Acronyms

 
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2D-MAX-DOAS
two-dimensional multi-axis differential optical absorption spectroscopy
2D-S
(stereo) optical array spectrometer
2DC
two-dimensional cloud
2DVD
two-dimensional video disdrometer
3DVAR
three-dimensional variational data assimilation
4DDA
four-dimensional data assimilation
4STAR
Spectrometer for Sky-scanning Sun-Tracking Atmospheric Research (NASA)
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A

A-ATOFMS
Aircraft-aerosol time-of-flight mass spectrometer
AA
absorbing aerosols
AACP
above-anvil cirrus plume
AAD
Australian Antarctic Division
AAE
Absorption Angstrom Exponent
AAF
ARM Aerial Facility
AALCO
Aerial Assessment of Liquid in Clouds at Oliktok
AAO
Adjacent Arctic Ocean
AAOD
aerosol absorption optical depth
AATS
Ames airborne tracking sunphotometer
AATSR
Advanced Along-Track Scanning Radiometer
ABC
absorbing boundary condition or atmospheric brown cloud
ABE
Aerosol Best Estimate
ABL
atmospheric boundary layer
ABLE
Argonne Boundary Layer Experiment or Arctic Boundary Layer Experiment
ABoVE
Arctic-Boreal Vulnerability Experiment
ABRACOS
Anglo-Brazilian Amazonian Climate Observation Study
ABRFC
Arkansas Basin Red River Forecast Center
ACAPEX
ARM Cloud Aerosol Precipitation Experiment
ACARS
Aerodynamic (Research Incorporated) Communication and Recording System or Aircraft Communication Addressing and Reporting System
ACCACIA
Aerosol Cloud Coupling and Climate Interaction in the Arctic
ACCESS
Australian Community Climate and Earth System Simulator
ACE
Aerosol Characterization Experiment
ACE-2
Second Aerosol Characterization Experiment
ACE-Asia
Asian Pacific Regional Aerosol Characterization Experiment
ACE-ENA
Aerosol and Cloud Experiments in the Eastern North Atlantic
ACI
aerosol-cloud interactions
ACME
Accelerated Climate Model for Energy
ACOM
Atmospheric Chemistry Observations and Modeling
ACOS
Atmospheric Carbon Observation from Space
ACP
absolute cavity pyrgeometer
ACR
airborne cloud radar
ACRE
Antarctic Clouds and Radiation Experiment
ACRF
ARM Climate Research Facility (no longer in use)
ACROS
airborne cloud-radiation observing system
ACSE
Arctic Clouds in Summer Experiment
ACSM
Aerosol Chemical Speciation Monitor
ACSYS
Arctic Climate System Study
ACT
ARM Coordination Team (no longer in use)
ACTIVE
aerosol and chemical transport in tropical convection
ACTOS
Airborne Cloud Turbulence Observation System
ACTRIS
Aerosols, Clouds and Trace Gases Research Infrastructure
ADA
anomalous diffraction approximation
ADAS
ARPS data analysis system
ADC
analog-to-digital converter
ADDEM
aerosol diameter-dependent equilibrium model
ADEOS
advanced earth observing system (Japan Space Program)
ADI
ARM Data Integrator
ADM
angular dependence model
ADMB
Air-deployed microbuoys
ADMIRARI
Advanced Microwave Radiometer for Rain Identification
ADT
anomalous diffraction theory
AE
Angstrom exponent (no longer in use)
AEB
Agencia Espacial Brasileira
AEBR
aerosol extinction-to-backscatter ratios
AEC
ARM Experiment Center
AEM
Automatic Exchange Mechanism
AER
Atmospheric Environmental Research, Inc.
AERI
atmospheric emitted radiance interferometer
AERI-ER
extended-range AERI
AERI-X
high-resolution (0.1 cm-1) version of AERI
AERIoe
Atmospheric Emitted Radiance Interferometer Optimal Estimation
AEROCLO-sA
Aerosol Radiation and Clouds in southern Africa
AERONET
Aerosol Robotic Network
AEROSE
Aerosol and Ocean Science Expedition
AES
airborne emission spectrometer or Atmospheric Environment Services (Canada)
AETH
Aethalometer
AF
adiabatic fraction
AFGL
Air Force Geophysics Laboratory
AFM/IR
atomic force microscope-infrared
AFOSR
Air Force Office of Scientific Research
AFRC
Armstrong Flight Research Center
AFRL
Air Force Research Laboratory
AFWEX
ARM-FIRE Water Vapor Experiment
AGARD
Advisory Group for Aerospace Research and Development
AGASP
Arctic Gas and Aerosol Sampling Program
AGC
Automatic Gain Control
AGCMs
atmospheric general circulation models
AGGI
annual greenhouse gas index
AGL
above ground level
AGU
American Geophysical Union
AHM
adaptive habit model
AI
aerosol index
AIA
ARM Information Architecture
AIDA
Aerosol Interaction and Dynamics in the Atmosphere cloud chamber (Karlsruhe Institute of Technology)
AIDJEX
Arctic Ice Dynamics Joint Experiment
AIE
aerosol indirect effect
AIF
aerosol indirect forcing
AIIE
Airborne Icing Instrumentation Evaluation
AIMS
Australian Institute of Marine Science
AIP
Algorithm Intrcomparison Project
AIRS
atmospheric infrared sounder or Alliance Icing Research Study
AIS
ARCS Integration Site (no longer in use)
AIV
aerosol invigoration effect
ALABAMA
aircraft-based laser ablation mass spectrometer
ALBSA
Aleutian Low-Beaufort Sea Anticyclone
ALC-IOP
Aerosol Lifecycle Intensive Observational Period (a 2011 U.S. DOE field campaign)
ALEX
AIDEX Lead Experiment
ALFA
AER local forecast and assimilation (model)
ALIVE
Aerosol Lidar Validation Experiment
ALM
ACME Land Model
ALOSE
Along Line of Site Experiment
ALTOS
Arctic Lower Troposphere Observed Structure
AMAP
Arctic Monitoring and Assessment Program (Arctic Council)
AMAZE
Amazonian Aerosol Characterization Experiment
AME
aerosol microphysical effect
AMEX
Australian Monsoon Experiment
AMF
ARM Mobile Facility
AMIE
ACRF MJO Investigation Experiment
AMIP
Atmospheric Model Intercomparison Project
AMMA
African Monsoon Multidisciplinary Analysis
AMO
Atlantic Multidecadal Oscillation
AmPMS
Ambient-pressure Proton transfer Mass Spectrometer
AMPS
Antarctic Mesoscale Prediction System
AMS
aerosol mass spectrometer or accelerator mass spectrometer
AMS-SMPS
aerosol mass spectrometer-scanning mobility particle sizer
AMSL
above mean sea level
AMSR
advanced microwave scanning radiometer
AMSU-B
Advanced Microwave Sounding Unit-B
AMT
ARM Management Team or Aerosol Modeling Testbed
ANL
Argonne National Laboratory
AO
Arctic Oscillation
AOD
aerosol optical depth
AOFB
Autonomous ocean flux buoy
AOGCM
atmosphere-ocean global coupled model or atmosphere-ocean general circulation model
AOML
Atlantic Oceanographic and Meteorological Laboratory
AOP
aerosol optical properties
AOPCIC
Aerosol Optical Particle Counter Intercomparison Campaign
AOS
aerosol observing system
AOT
aerosol optical thickness
AP
anisotropy parameter
API
application programming interface
APIMS
Atmospheric Pressure Ionization Mass Spectrometry
APIP
aircraft-produced ice particle
APOLLO
AVHRR Processing Scheme Over Land, Cloud, and Ocean
APPI
atmospheric pressure photoionization
APREF
Asia-Pacific Reference Frame
APS
aerosol particle-sizing spectrometer or aerodynamic particle sizer
APSS
absorbing polystyrene spheres
AR
atmospheric river
ARC
Ames Research Center
ARCPAC
Aerosol, Radiation, and Cloud Processes affecting Arctic Climate
ARCS
Atmospheric Radiation and Cloud Station (no longer in use)
ARCSS
Arctic System Science (NSF)
ARCSYM
Arctic Regional Climate System Model
ARCTAS
Arctic Research of the Composition of the Troposphere from Aircraft and Satellites
ARCUS
Arctic Research Consortium of the United States
ARDT
Atmospheric River Detection Tool
ARE
aerosol radiative effect
ARESE
ARM Enhanced Shortwave Experiment
ARF
aerosol radiative forcing
ARGN
Australian Regional GPS Network
ARH
atmospheric radiative heating
ARI
aerosol-radiation interactions
ARIES
Aryabhatta Research Institute of Observational Sciences
ARINC
Aerodynamic Research Incorporated Communication
ARL
Air Resources Laboratory (NOAA)
ARM
Atmospheric Radiation Measurement
ARM-ACME
ARM Airborne Carbon Measurements
ARMBE
ARM best estimate (data products)
ARMBEATM
ARM Best Estimate Atmospheric Measurements value-added product
ARMBECLDRAD
ARM Best Estimate Cloud Radiation value-added product
ARPS
Advanced Regional Prediction System
ARRA
American Recovery and Reinvestment Act (can also be shortened to "Recovery Act").
ARS
Agricultural Research Service
ARSCL
Active Remotely Sensed Cloud Locations (an ARM VAP)
ARTEMIS
Advanced Responsive Tactically Effective Military Imaging Spectrometer
ARTS
Atmospheric Radiative Transfer Simulator
AS
anvil stratus
ASAP-MS
atmospheric solids analysis probe mass spectrometry
ASC
arctic stratus cloud
ASCAT
Advanced SCATterometer
ASCII
American Standard Code for Information Interchange file format
ASCOS
Arctic Summer Cloud Ocean Study
ASD
analytical spectral devices
ASIR
absolute scanning infrared radiometer
ASIVA
All Sky Infrared Visible Analyzer
ASM
Asian summer monsoon
ASOP
atmospheric soil organic particles
ASOS
automatic surface observing system
ASP
Atmospheric Science Program
ASPEN
Atmospheric Sounding Processing Environment (NCAR software)
ASR
aerosol scattering ratio or absorbed solar radiation or absolute sky-scanning radiometer
ASRC
Atmospheric Sciences Research Center
ASSIST
Atmospheric Sounder Spectrometer for Infrared Spectral Technology
ASSP
axially scattering spectrometer probe
ASTER
Atmosphere-Surface Turbulent Exchange Research or Advanced Spaceborne Thermal Emission and Reflection Radiometer (NASA)
ASTEX
Atlantic Stratocumulus Transition Experiment
ASTI
absolute solar transmittance interferometer
ASTIC
All Sky Thermal Infrared Camera
ATD
Atmospheric Technology Division (NCAR)
ATHAM
Active Tracer High-resolution Atmospheric Model
ATLID
Atmospheric backscatter lidar
ATM
Atmospheric Transport Model
ATMIS-II
Atmospheric Moisture Comparison Study
ATML
Atmospheric and Terrestrial Mobile Laboratory
ATMOS
Atmospheric Trace Molecule Spectroscopy
ATMS
Advanced Technology Microwave Sounder
ATOMMS
Active Temperature, Ozone Moisture Microwave Spectrometer
ATR/FTIR
attenuated total reflectance-Fourier transform infrared
ATSR
Along-Track Scanning Radiometer
ATTREX
Airborne Tropical Tropopause Experiment
AUSMI
Australian monsoon index
AVA
ARM Volume-Imaging Array
AVG
Adaptive Vertical Grid
AVHRR
advanced very-high-resolution radiometer
AVIRIS
airborne visible and infrared imaging spectrometer
AVMP
atmospheric vertical moisture profile
AVOC
anthropogenic volatile organic carbon
AVP
ARM Aerial Vehicles Program *As of February 2009, this program was renamed ARM Aerial Facility.
AVTP
atmospheric vertical temperature profile
AWARE
ARM West Antarctic Radiation Experiment
AWEX
AIRS Water Vapor Experiment
AWIPS
Advanced Weather Interactive Processing System
AWPAG
All-Weather Precipitation Accumulation Guage
AWS
automated weather station
AZA
azimuth angle
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BAECC
Biogenic Aerosols - Effects on Clouds and Climate
BAECC SNEX
Biogenic Aerosols--Effects on Clouds and Climate: Snowfall Experiment
BAERI
Bay Area Environmental Research Institute
BAMEX
Bow Echo and Mesoscale Convective Vortices Experiment
BAMS
Bulletin of the American Meteorological Society
BAO
Boulder Atmospheric Observatory
BAPMoN
Background Air Pollution Monitoring
BARC
Barrow Arctic Research Center
BARFEX
Boardman Atmospheric Radiation Flux Experiment
BASE
Beaufort Arctic Storms Experiment
BASE-A
Biomass Burning Airborne and Spaceborne Experiment in the Amazonas
BATSE1
Biosphere-Atmosphere Transfer Scheme, Version 1e
BB
biomass burning
BBA
biomass burning aerosols
BBCEAS
broadband cavity enhanced absorption spectrometer
BBHRP
broadband heating rate profile
BBOA
biomass burning organic aerosol
BBOP
Biomass Burning Observation Project
BBSS
balloon-borne sounding system
BC
black carbon
BC4
Boston College-Aerodyne led Coated Black Carbon Study
BCADS
Black Carbon Aerosol Deposition Study
BCL
buoyant condensation level
BCO
Barbados Cloud Observatory
BCR
baseline change request
BCS
Bayesian Compressive Sensing
BDRF
bidirectional reflectance functions
BEACH-ON-ROMBAS
Biohydro-atmosphere interactions of Energy, Aerosols, Carbon, H2O, Organics & Nitrogen Rocky Mountain Biogenic Aerosol Study
BEO
Barrow Environmental Observatory
BER
Biological and Environmental Research
BESST
Ball Experimental Sea Surface Temperature instrument
BF
boundary facility
BGC
biogeochemistry
BIC
Bayesian Information Criterion
BIOS
Bermuda Institute of Ocean Sciences
BL
boundary layer
BLC
Belfort laser ceilometer or boundary layer convection
BLCWG
Boundary Layer Cloud Working Group (GCSS)
BLH
boundary layer height
BLISS
Boundary Layer Sensing and Simulation working group
BLX
Boundary Layer Experiment
BMRC
Bureau of Meteorological Research Center
BNL
Brookhaven National Laboratory
BOM
Australian Bureau of Meteorology
BOMEX
Barbados Oceanographic and Meteorological Experiment
BORCAL
broadband outdoor radiometer calibration
BOREAS
Boreal Ecosystem-Atmosphere Study
BRDF
bidirectional reflectance distribution function
BRS
broadband radiometer station
BSA
Beaufort Sea Anticyclone
BSISO
boreal summer intraseasonal oscillation
BSRN
baseline surface radiation network
BSRWP
beam-steered radar wind profiler
BT
back trajectory or brightness temperature
BTD
brightness temperature difference
BVOC
biogenic volatile organic compound
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C-LAMP
Carbon-Land Model Intercomparison Project
C4MIP
Coupled Climate-Carbon Cycle MIP
C5H8
isoprene
CAA
Clean Air Act (U.S.) or cloud absorption anomaly
CABL
Characterizing the Atmospheric Boundary Layer
CACTI
Cloud, Aerosol, and Complex Terrain Interactions
CAD
computer-aided design
CAF
cloud area fraction
CAFS
Coupled Arctic Forecasting System
CAGATE
CCPP-ARM GCM analysis of tendency errors (no longer in use)
CAGEX
CERES/ARM/GEWEX Experiment
CALIOP
Cloud-Aerosol Lidar with Orthogonal Polarization
CALIPSO
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation
CALM
Circumpolar Active Layer Monitoring Grid
CalNex
California Nexus of Air Quality and Climate Experiment
CALVAL
Calibration and Validation
CAM
Community Atmosphere Model or convection-allowing model
CAM-4
NCAR Community Atmosphere Model Version 4
CAM-5
NCAR Community Atmosphere Model
CAM-MAM
PNNL Modal Aerosol Model
CAMEX
Convection and Moisture Experiment
CAMS
Copernicus Atmosphere Monitoring Service
CANSISE
Canadian Sea Ice and Snow Evolution Network
CAP-MBL
Cloud, Aerosol, and Precipitation in the Marine Boundary Layer
CAPE
convective available potential energy or Convection and Precipitation/Electrification experiment
CAPI
cloud-aerosol-precipitation interactions
CAPMoN
Canadian Air and Precipitation Monitoring Network
CAPPI
Constant Altitude Plan Position Indicators
CAPS
cloud, aerosol, and precipitation spectrometer or cavity attenuated phase shift
CAPS-PMEX
cavity attenuated phase shift extinction monitor
CAPT
CCPP-ARM Parameterization Testbed (no longer in use)
CAR
corrective action report
CARB
California Air Resources Board
CARES
Carbonaceous Aerosol and Radiative Effects Study
CARI
Community Airborne Research Instrumentation
CARL
CART Raman lidar (no longer in use)
CARMA
Community Aerosol-Radiation-Microphysics Application
CARRIBA
Cloud, Aerosol, Radiation, and Turbulence in the Trade Wind Regime over Barbados
CARSNET
China Aerosol Remote Sensing Network
CART
Cloud and Radiation Testbed (no longer in use)
CARVE
Carbon in the Arctic Reservoirs Vulnerability Experiment
CAS
cloud aerosol spectrometer
CASA
Carnegie-Ames-Stanford Approach
CASCC
Caltech Active Strand Cloud water Collector
CASES
Cooperative Atmosphere Surface Exchange Study
CASS
Continental Active Surface-Forced Shallow Cumulus
CAST
Co-ordinated Airborne Studies in the Tropics
CASTNET
Clean Air Status and Trend Network
CAUSES
Cloud Above the United States and Errors at the Surface
CAWCR
Centre for Australian Weather and Climate Research
CAWS
Canadian Arctic Weather Science
CBG
Chebogue Point (Canada)
CBH
cloud base height
CBL
convective boundary layer
CCAP
Characterization of Cirrus and Aerosol Properties
CCCMA
Canadian Centre for Climate Modelling and Analysis
CCD
charge-coupled device
CCEW
convectively coupled equatorial waves
CCI
Climate Change Initiative (ESA)
CCIE
Coastal Convective Interaction Experiment
CCM1
Community Climate Model, Version 1
CCM2
Community Climate Model, Version 2
CCM3
Community Climate Model, Version 3
CCN
cloud condensation nuclei
CCPP
Climate Change Prediction Program
CCSEM/EDX
computer-controlled scanniing electron microscopy/energy-dispersive X-ray spectroscopy
CCSM2
Community Climate System Model, Version 2
CCSP
Climate Change Science Program or Carbon Cycle Science Plan
CDAAC
Constellation Observing System for Meteorology, Ionosphere, and Climate Data Analysis and Archive Center
CDE
CART data environment (no longer in use)
CDER
cloud droplet effective radius
CDF
cumulative distribution function
CDL
cloud detection lidar or coherent Doppler lidar
CDNC
cloud droplet number concentration
CDP
cloud droplet probe
CDR
circular depolarization ratio or Critical Design Review
CDSD
cloud droplet size distribution
CE
collection efficiency
CEAREX
Coordinated Eastern Arctic Experiment
CED
cloud equivalent diameter
CEES
Committee on Earth and Environmental Sciences
CEM
cloud ensemble model
CEOS
Committee on Earth Observation Satellites
CEP
cloud extinction probe
CEPEX
Central Equatorial Pacific Experiment
CERES
Clouds and the Earth's Radiant Energy System
CESAR
Cabauw Experimental Site for Atmospheric Research
CESD
Climate and Environmental Science Division
CESM
Community Earth System Model
CESM-LENS
Community Earth System Model Large Ensemble Project
CF
Central Facility or Climate and Forecast or cloud fraction
CFAD
contoured-frequency-by-altitude diagram
CFC
chlorofluorocarbon
CFCR
Centroid Frequency Chirp Rate
CFDC
continuous flow diffusion chamber
CFDE II
Canadian Freezing Drizzle Experiment II
CFH
cryogenic frost point hygrometer
CFI
cloud-free index or Canada Foundation for Innovation
CFMIP
Cloud Feedback Model Intercomparison Project
CFODD
Contoured Frequency by Optical Depth Diagram
CFP
carbon flux phenology
CFSR
Climate Forecast System Reanalysis (NCEP)
CGA
calibration, grooming, and alignment
CGCM
coupled (ocean-atmosphere) general circulation model
CGPS
Continuous Global Positioning System
CHAPS
Cumulus Humilis Aerosol Processing Study
CHARMS
CH4 Atmospheric Remote Monitoring
CHARTS
Code for High-Resolution Accelerated Radiative Transfer from Scattering
CI
convective initiation
CIC
Cloudiness Intercomparison Campaign (no longer in use)
CIDS
CEPEX integrated data system
CIMMS
Cooperative Institute for Mesoscale Meteorological Studies
CIMS
chemical ionization mass spectrometer
CIMSS
Cooperative Institute for Meteorological Satellite Studies
CIN
convective inhibition
CINC
cloud ice number concentration
CINDY2011
Cooperative Indian Ocean Experiment on Intraseasonal Variability in Year 2011
CIP
column intensive properties or cloud imaging probe
CIR
cloud infrared radiometer
CIRA
Cooperative Institute for Research in the Atmosphere
CIRES
Cooperative Institute for Research in Environmental Sciences (U. of Colorado)
CIRP
Cooperative Institute for Regional Prediction (University of Utah)
CIRPAS
Center for Interdisciplinary Remotely Piloted Aircraft Studies
CKE
cumulus kinetic energy or collisional kinetic energy
CL
convective precipitation over land
CLACE
Cloud and Aerosol Characterization Experiments
CLAMPS
Collaborative Lower Atmospheric Mobile Profiling System
CLAMS
Chesapeake Lighthouse and Aircraft Measurements for Satellites
CLAP
continuous light absorption photometer
CLARIFY-2017
Cloud-Aerosol-Radiation Interactions and Forcing: Year 2017
CLASIC
Cloud Land Surface Interaction Campaign
CLASS
Cross-Chain Loran Atmospheric Sounding System
CLAVR
Cloud Advanced Very High-Resolution Radiometer
CLEAR
Colorado State University Lightning, Environment, Aerosol, and Radar analysis framework
CLEARFLO
Clean Air for London
CLEX
Complex Layered Cloud Experiment
CLI
command line interface
CLIVAR
Climate Variability and Predictability (Program)
CLM
Community Land Model
CLOWD
Clouds with Low Optical (Water) Depths Working Group
CLP
cloud liquid path (no longer in use)
CLS
cloud and aerosol lidar system
CLUBB
Cloud Layers Unified By-Binormals
CLW
column liquid water
CLWG
Cloud Lifecycle Working Group
CLWP
cloud liquid water path
CM
cloud mask
CMAP
Climate Prediction Center Merged Analysis of Precipitation
CMAQ
Community Multiscale Air Quality
CMBE
Climate Modeling Best Estimate
CMC
Canadian Meteorological Centre
CMCS
connected MCS
CMDEWP
chilled-mirror dew point hygrometer
CMDL
Climate Monitoring and Diagnostics Laboratory (NOAA)
CMIP
Coupled Model Intercomparison Project
CMMG
Center of Climate, Meteorology, and Climate change (University of the Azores)
CMORPH
Climate Prediction Center Morphing Technique
CMSAF
Climate Monitoring Satellite Application Facility
CMT
convective momentum transport
CN
condensation nucleus
CNES
Centre National d'Etudes Spatiales
CNPq
Brazilian National Council for Scientific and Technological Development
CNT
classical nucleation theory
Co2FLX
carbon dioxide flux system
COALA
Coordinated Observations of the Lower Arctic Atmosphere
COARE
Coupled Ocean Atmosphere Response Experiment
COBRA
CO2 Budget and Rectification Airborne stody
COD
cloud optical depth
CODE
Center for Orbit Determination in Europe
COLMA
Colorado Lightning Mapping Array
COMBLE
Cold-Air Outbreaks in the Marine Boundary Layer Experiment
CombRet
Combined Retrieval
CONTRAST
CONvective TRansport of Active Species in the Tropics
CONUS
continental United States
COPE
Convective Precipitation Experiment
COPS
Convective and Orographically-induced Precipitation Study
COSMIC
Constellation System for Meteorology, Ionosphere, and Climate
COSP
CFMIP Observation Simulator Package
CP
Cloud Properties Working Group
CPC
Climate Prediction Center
CPI
cloud particle imager
CPM
Cloud Parameterization and Modeling
CPMA
centrifugal particle mass analyzer
CPOL
C-band polarimetric radar
CPRS
cloud profiling radar system
CPT
cold point tropopause
CPW
Cloud Properties Working Group (no longer in use)
CQI
continuous quality improvement
CRAICC
Nordic Centre of Excellence
CRD
cavity ring-down
CRD-AES
cavity ring down aerosol extinction spectrometer
CRE
cloud radiative effect
CRF
cloud radiative forcing
CRH
column relative humidity
CRHF
cloud radiative heat forcing
CRL
compact Raman lidar
CRM
cloud-resolving model or column radiation model
CROC
Convective Radio Occultations Campaign
CRREL
Cold Regions Research and Engineering Laboratory (U.S. Army Corps of Engineers)
CRS
Clouds and Radiative Swath
CRYSTAL-FACE
Cirrus Regional Study of Tropical Anvils and Cirrus Layers—Florida Area Cirrus Experiment
CS
cloudscope
CSA
convective-stratiform-anvil
CSCE
Continental Stratocumulus Experiment (Pennsylvania State University)
CSET
Cloud System Evolution in the Trades
CSHNET
Chinese Sun Hazemeter Network
CSI
cloud spectrometer and impactor or clear-sky identification
CSIP
Convective Storm Initiation Project
CSIRO
Commonwealth Scientific and Industrial Research Organization
CSLAEX
Cross-Scale Land-Atmosphere Experiment
CSM1
Climate System Model, Version 1
CSP
Combined Sensor Program
CSPHOT
cimel photometer
CSPOT
camel sun photometer (no longer in use)
CSRM
cloud system-resolving model (no longer in use)
CSTRIPE
Coastal Stratocumulus Imposed Perturbation Experiments
CSU
Colorado State University
CSU-MAPS
California State University mobile atmospheric profiling system
CT
cloud thickness
CTBL
cloud-topped boundary layer or cumulus-topped boundary layer
CTFS
Center for Tropical Forest Science
CTH
cloud top height
CTL
CarbonTracker-Lagrange
CTM
chemical transport model
CTP
convective triggering potential
CTT
cloud-top temperature
Cu
cumulus
CuPIDO
Cumulus Photogrammetric, In situ, and Doppler Observations
CUT
Coordinated Universal Time
CVE
coherent vorticity extraction
CVF
cloud vertical fraction
CVI
counter-flow vertical impactor
CW3E
Center for Western Weather and Water Extremes
CWV
columnar water vapor
CZO
Critical Zone Observatory
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DAAC
Distributed Active Archive Center
DABUL
depolarization aerosol and backscatter unattended lidar
DACCIWA
Dynamics-aerosol-chemistry-cloud interactions in West Africa
DALES
Dutch Atmospheric Large Eddy Simulation model
DAO
data assimilation office
DARF
direct aerosol radiative forcing
DART
discrete angle radiative transfer or Data Assimilation Research Testbed (NCAR)
DAWEX
Darwin Wave Experiment
DBS
Dichroic Beam Splitter
DC3
Deep Convective Clouds and Chemistry
DCC
deep convective cloud
DCP
downward control principle
DDA
discrete dipole approximation
DDI
downwelling diffuse irradiance
DDR
diffuse-to-direct ratio
DDV
differential Doppler velocity
DEM
digital elevation model
DER
droplet effective radius
DESI
desorption electrospray ionization
DESI-HRMS
desorption electrospray ionization high-resolution mass spectrometry
DESI-MS
desorption electrospray ionization mass spectrometry
DEW
distant early warning
DFAR
double-fence automated reference
DFDI
diffuse downward irradiance
DFG
Deutsche Forschungsgemeinschaft (German Research Foundation)
DFIR
double-fence intercomparison reference
DFR
dual-frequency reflectivity ratio
DGVM
dynamic global vegetation model
DHARMA
Distributed Hydrodynamic Aerosol and Radiative Modeling Application
DHR
differential heating rate
DIAL
differential absorption lidar
DICE
Diurnal Land/Atmosphere Coupling Experiment
DISORT
discrete ordinate radiative transfer
DLCA
diffusion-limited cluster aggregation
DLF
downwelling longwave flux (no longer in use)
DLH
diode laser hygrometer
DLR
Deutsches Zentrum fur Luft- und Raumfahrt (German Aerospace Center)
DMA
differential mobility analyzer or Defense Mapping Agency
DMAN
Dynamic Model for Aerosol Nucleation
DMF
Data Management Facility or dry air mole fraction
DMPS
differential mobility particle sizer
DMS
Data Management System
DMSP
Defense Meteorological Satellite Program
DMT
Data Management Team or Droplet Measurement Technologies
DNS
direct numerical simulation
DNSI
direct-normal solar irradiance
DOAS
differential optical absorption spectroscopy
DOC
dissolved organic carbon
DOD
data object design
DOE
U.S. Department of Energy
DOF
depth of field
DOFS
degree of freedom for signal
DOI
Digital Object Identifier
DOMEX
Dominica Experiment
DOP
dioctyl phthalate
DOS
dioctyl sebacate
DOW
Doppler on wheels: dual-polarization X-band Doppler radar
DOY
day of year
DPR
dual-frequency precipitation radar
DPV
diesel-powered vehicles
DQ
Data Quality
DQ HandS
Data Quality Health and Status
DQAR
Data Quality Assessment Report
DQM
Data Quality Manager
DQMS
Data Quality Management System
DQO
Data Quality Office
DQPR
Data Quality Problem Report
DQR
Data Quality Report
DR
depolarization ratio
DRE
direct radiative effect
DRF
direct radiative forcing or diurnal mean radiative forcing
DRFE
diurnal mean radiative forcing efficiency
DRI
Desert Research Institute
DRUM
Davis Rotating-drum Universal-size-cut Monitoring
DSC
directed scattering coefficients
DSD
drop size distribution
DSE
dry static energy
DSIT
Data and Science Integration Team
DSLR
digital single-lens reflex
DSP
digital signal processor
DTLB
drained thaw lake basin
DVD
Doppler velocity difference
DVM
dynamic vegetation model
DWR
dual-wavelength ratio
DYCOMS-II
Second Dynamics and Chemistry of Marine Stratocumulus Experiment
DYMECS
Dynamical and Microphysical Evolution of Convective Storms
DYNAMO
Dynamics of the Madden-Julian Oscillation (MJO)
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E-AIM
Extended Aerosol Inorganics Model
E3SM
Energy Exascale Earth System Model
EA
environmental assessment
EARLINET
European Aerosol Research Lidar Network
EASE
Equal-Area Scalable Earth grid
EASM
East Asian summer monsoon
EASOE
European Arctic Stratospheric Ozone Experiment
EAST-AIRC
East Asian Studies of Tropospheric Aerosols and Impact on Regional Climate
EAST-AIRE
East Asian Study of Tropospheric Aerosols: an International Regional Experiment
EB
energy balance
EBBR
energy balance bowen ratio
EC
Experiment Center or eddy correlation or eddy covariance or Environment Canada or elemental carbon
ECC
electrochemical cell
ECCC
Environmental and Climate Change Canada
ECDL
external cavity diode laser
ECLIPS
Experimental Cloud Lidar Pilot Study
ECMWF
European Centre for Medium-Range Weather Forecasts
ECOR
eddy correlation or eddy correlation flux measurement system
ECPP
Explicit-Cloud Parameterized-Pollutant
ECR
Engineering Change Request
ECS
equilibrium climate sensitivities
ECV
essential climate variable
ED
experiment design
EDAS
Eta Data Assimilation System
EDC
EROS Data Center (USGS)
EDGAR
Emissions Database for Global Atmospheric Research
EDMF
eddy-diffusivity/mass-flux
EDR
energy dissipation rate
EDS
energy dispersive spectroscopy
EDX
energy dispersive X-ray spectroscopy
EDXMA
energy dispersive X-ray microanalysis
EELS
electron energy loss spectroscopy
EEPROM
electrically erasable programmable read-only memory
EESI
extractive electrospray ionization
EF
extended facility or evaporative fraction or emission factor
EF/TEM
energy filtered/transmission electron microscopy
EFEDA
European Field Experiment in a Desertification-threatened Area
EGA
evolved gas analysis
EGF
ethanol growth factors
EGU
electric generation unit
EI
electron ionization
EIL
entrainment interfacial layer
EIS
estimated inversion strength
EL
equilibrium level
ELF
extremely low frequency
ELP
evaporated liquid particle
ELVOC
extremely low-volatility organic compound
EM-MIC
electromagnetic-microphysical
EMEP
European Monitoring of Environmental Pollution program or European Monitoring and Evaluation Programme
EMERALD
Egrett Microphysics Experiment with Radiation, Lidar, and Dynamics
EMEX
Equatorial Mesoscale Experiment
EML
Environmental Measurements Laboratory (DOE)
ENA
Eastern North Atlantic
ENCORE
ENsemble ClOud Retrieval
EnKF
ensemble adjustment Kalman filter
ENP/A
Eastern North Pacific/Atlantic
ENSO
El Nino-Southern Oscillation
ENTLN
Earth Networks Total Lightning Network
ENVI
Environment for Visualizing Images
ENVSAT
ESA earth observation satellite (now inactive)
EOF
empirical orthogonal functions
EOL
Earth Observing Laboratory (NCAR)
EOM
Easter Ocean Margin (CART site)
EOP
experiment operation plan or extended operational period
EOS
earth observing plan
EPA
U.S. Environmental Protection Agency
EPIC
Eastern Pacific Investigation of Climate
EPLAB
The Eppley Laboratory, Inc.
EPRI
Electric Power Research Institute
ER
ecosystem respiration
ERASMUS
Evaluation of Routine Atmospheric Sounding Measurements using Unmanned Systems
ERAST
Environmental Research Aircraft and Sensor Technology (NASA)
ERBE
Earth Radiation Budget Experiment
ERL
Environmental Research Laboratory
ERL (SGP site)
Electronics Repair Laboratory
ERM
eddy-resolving model
EROS
earth sciences resources observation systems
ERS-1
European research satellite-1
ESA
European Space Agency or enhanced sounding array
ESFT
exponential sum fitting of transmission (technique)
ESGF
Earth System Grid Federation
ESI
electrospray ionization
ESLCS
Enhanced Soundings for Local Coupling Studies
ESM
Earth System Modeling (U.S. DOE program)
ESM-SnowMIP
Earth System Model Snow Model Intercomparison Project
ESMValTool
Earth System Model Evaluation Tool
ESRL
Earth System Research Laboratory (NOAA)
ESTAR
electronically scanned thinned array radiometer
ESTARFM
Enhanced Spatial and Temporal Adaptive Reflectance Fusion Model
ET
evapotranspiration
ETA/EDAS
ETA Data Assimilation System
ETH
echo top height
ETL
Environmental Technology Laboratory (NOAA)
ETM+
enhanced thematic mapper plus
EUCREM
European Cloud-Resolving Modeling
EUCREX
European Cloud and Radiation Experiment
EUMETSAT
European Organisation for the Exploitation of Meteorological Satellites
EUROCS
European Project for Cloud Systems Studies
EVI
enhanced vegetation index
EVS
Earth Venture Suborbital
EWO
Engineering Work Order
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FAA
Federal Aviation Administration
FAAM
Facility for Airborne Atmospheric Measurements (UK)
FACE
Free-Air Carbon dioxide Enrichment
FAD
frequency-by-altitude diagram
FAO
Flatland Atmospheric Observatory
FASCODE
Fast Atmospheric Signature Code
FASE
FASCODE for the environment
FASINEX
First Air-Sea Interaction Experiment
FASTER
FAst-physics System TEstbed and Research (a BNL project)
FBAP
fluorescent biological aerosol particle
FC
IISCCP Flux Cloud
FCC
fractional cloud cover
FCCSET
Federal Coordinating Council on Science, Engineering, and Technology
FCDP
fast cloud droplet probe
FDDA
four-dimensional data assimilation
FDTD
finite-dimensional data assimilation or finite-difference time domain
FE-SEM
field emission scanning electron microscope
FFSSP
fast-forwarding scattering spectrometer probe
FFT
fast Fourier transform
FIA
Forest Inventory and Analysis
FIDO
Field Instrument Deployments and Operations
FIDUCEO
Fidelity and Uncertainty in Climate Data record from Earth Observations
FIE
first aerosol indirect effect
FIFE
First ISLSCP Field Experiment
FIGAERO
filter inlet for gases and aerosols
FIMS
fast integrating mobility spectrometer
FIRE
First ISCCP Regional Experiment
FIRST
Far-Infrared Spectroscopy of the Troposphere
FLAASH
Fast Line-of-Sight Atmospheric Analysis of Hypercubes
FLAME-IV
Fourth Fire Lab at Missoula Experiment
FLRT
flexible, longwave, radiative transfer
FMCW
Frequency Modulated Continuous Wave
FMF
fine mode fraction
FMI
Finnish Meteorological Institute
FNMOC
Fleet Numerical Meteorology and Oceanography Center
FONSI
finding of no significant impact
ForestGEO
Forest Global Earth Observatory
ForTraCC
Forecasting and Tracking the evolution of Cloud Clusters
FOV
field of view
FPH
frost point hygrometer
fps
frames per second
FROST
Front Range Orographic Storms
FRSR
fast rotating shadowband radiometer
FSBR
fractional solar broadband radiometer
FSD
fractional standard deviation
FSL
Forecast Systems Laboratory (NOAA)
FSSP
forward scattering spectrometer probe
FT
free troposphere
FTIR
fourier transform infrared radiometer
FTRH
free tropospheric relative humidity
FTS
Fourier transform spectrometer
FWHM
full width at half maximum
FWI
Fractional Water Index
FWSC
fair-weather shallow cumulus
FY
Fiscal Year
FZL
freezing level
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GA
Geoscience Australia or genetic algorithm
GAC
global area coverage
GALE
Genesis of Atmosphere Lows Experiment
GAPD
Geiger-mode avalanche photo diode detector
GAPP
GEWEX Americas Prediction Project
GARP
Global Atmospheric Research Program
GASS
global atmospheric system studies
GATE
GARP Atlantic Tropical Experiment
GAUS
GPS Advanced Upper-Air Sounding System
GAW
Global Atmosphere Watch
GC-ECD
gas chromatograph-electron capture detector
GC-ITMS
gas chromatograph ion trap mass spectrometer
GC-MS
gas chromatograph-mass spectrometer
GCCN
giant cloud condensation nuclei
GCE
Goddard Cumulus Ensemble model
GchM-O
Global Chemistry Model driven by observed meteorology
GCIP
GEWEX Continental-Scale International Project
GCM
General Circulation Model (no longer in use)
GCOS
Global Climate Observing System
GCSS
GEWEX Cloud System Study
GCW
Global Cryosphere Watch
GDAS
Global Data Assimilation System
GDEM
Global Digital Elevation Model
GEA
generic enhanced absorption
GEBA
global energy balance archive
GECKO-A
Generator of Explicit Chemistry and Kinetics of Organics in the Atmosphere
GEDI
Global Ecosystem Dynamics Investigation
GEFS
Global Ensemble Forecast System
GEISA
Gestion et Etude des Informations Spectroscopiques Atmospheriques
GEM
Global Ecosystem Monitoring network or Global Environmental Multiscale model
GENESIS
Global Environmental and Ecological Simulation of Interactive Systems
GEOS
Goddard Earth Observing System
GERB
Geostationary Earth Radiation Budget
GES DISC
Goddard Earth Sciences Data and Information Services Center (NASA)
GEWEX
Global Energy and Water Experiment
GF
growth factor
GFA
geophysical focus area
GFDL
Geophysical Fluid Dynamics Laboratory
GFED
Global Fire Emissions Database
GFEM
Galerkin finite element method
GFS
Global Forecast System
GHCN
Global Historic Climatology Network
GIFTS
Geostationary Imaging Fourier Transform Spectrometer
GIM
geostatistical inverse modeling
GIPSY-OASIS
GNSS-Inferred Positioning System and Orbit Analysis Simulation Software
GIS
geophysical information system
GISS
Goddard Institute for Space Studies
GIST
GEWEX Integrated System Test
GLACE
Global Land-Atmosphere Coupling Experiment
GLAS
Geoscience Laser Altimeter System
GLASS
Global Land-Atmosphere System Study
GLCTS
Global Land Cover Test Site
GLDAS
Global Land Data Assimilation System
GLM
generalized linear model
GLO
ground-level ozone
GloBEIS
Global Biosphere Emissions and Interactions System
GLOMAP
Global Model of Aerosol Processes
GMD
Global Monitoring Division
GMI
GPM Microwave Imager
GMS
geostationary meteorological satellite or gross moist stability
GMST
global mean surface temperature
GMT
Greenwich Mean Time
GNDRAD
ground radiometers on stand for upwelling radiation
GNDVI
green normalized difference vegetation index
GNSS
Global Navigation Satellite System
GOALS
global-ocean-atmosphere-land-system
GOAMAZON
Observations and Modeling of the Green Ocean Amazon
GOCART
Goddard Chemistry Aerosol Radiation and Transport model
GODAS
Global Ocean Data Assimilation System
GOES
Geostationary Operational Environmental Satellite
GoMACCS
Gulf of Mexico Atmospheric Composition and Climate Study
GOME
Global Ozone Monitoring Experiment
GOSAT
Greenhouse gases Observing SATellite
GPCC
Global Precipitation Climatology Centre
GPCI
GCSS Pacific Cross-Section Intercomparison
GPCP
Global Precipitation Climatology Project
GPH
geopotential height
GPM
Global Precipitation Measurement mission (NASA)
GPP
gross primary productivity
GPS
global positioning system
GPS RO
global positioning system radio occultation
GPV
gasoline-powered vehicles
GRACE
Gravity Recovery And Climate Experiment
GRAMS
ground radiation measurement system
GRDC
Global Runoff Data Center
GrIS
Greenland Ice Sheet
GRMDM
Generalized Refractive Mixing Dielectric Model
GROGRAT
Gravity wave Regional OR Global Ray Tracer model
GRUAN
GCOS Reference Upper-Air Network
GSA
global sensitivity analysis
GSD
geometric standard deviation
GSFC
Goddard Space Flight Center
GSI
Gridpoint Statistical Interpolation
GSM
global spectral model
GSPO
Global Studies Program Office
GSWP3
Global Soil Wetness Project 3
GTS
global telecommunications system
GUAN
GCOS Upper Air Network
GUI
graphical user interface
GVAP
GEWEX Water Vapor Project
GVAX
Ganges Valley Aerosol Experiment
GVD
gradient of Doppler velocity
GVR
G-band (183 GHz) vapor radiometer
GVRP
G-band (183 GHz) vapor radiometer profiler
GWTSA
gamma-weighed two-stream approximation
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HadGEM2-ES
Hadley Centre Global Environmental Model version 2, earth system configuration
HADS
Hydrometeorological Automated Data System
HAIC-HIWC
High Altitude Ice Crystals-High Ice Water Content Project
HALOE
Halogen Occultation Experiment
HAPEX
Hydrology Atmosphere Pilot Experiment
HARIMAU
Hydrometeorological Array for Interseasonal Variation-Monsoon Automonitoring
HARP
HIAPER Airborne Radiation Package
HATPRO
Humidity and Temperature Profiler
HAWKS
HITRAN Atmospheric Workstation
HBL
hurricane boundary layer
HBMI
Howard Beltsville MWR Intercomparison
HCA
hydrometeor classification algorithm
HCF
heated condensation framework
HCR
HIAPER Cloud Radar
HDF
Heirarchical Data Format
HDOP
Horizontal dilution of precision
HDPE
high-density polyethylene
HDR
high dynamic range
HEA
high-energy approximation
HEPA
high-efficiency particulate air (filter)
HERB
Hydrologic Cycle and Earth Radiation Budget
HGF
hygroscopic growth factors
HI-SCALE
Holistic Interactions of Shallow Clouds, Aerosols, and Land-Ecosystems
HIAPER
High-performance Instrumented Airborne Platform for Environmental Research
HiLaMS
High-Latitude Measurement of Snowfall
HiLAT-RASM
High-Latitude Application and Testing of Earth System Models-Regional Arctic System Model (DOE)
HIPPO
HIAPER Pole-to-Pole Observations
HIRLAM
high-resolution limited area model
HIRS
High-Resolution Infrared Radiation Scanner
HIS
high-resolution interferometer spectrometer
HITRAN
high-resolution transmission
HL
high latitude
HMQC
heteronuclear multiple quantum coherence
HMT
hydrometeorological testbed
HOA
hydrocarbon-like organic aerosol
HOLODEC
holographic detector for clouds
HOM
highly oxidized molecule or highly oxygenated molecule or Holmes Moss (UK)
HOMME
High Order Method Modeling Environment
HONER
hemispherical optimized new radiometer
HOPE
High-Definition Clouds and Precipitation Observational Prototype Experiment
HPLC
high-performance liquid chromatography
HPR
high-pressure ridge
HR
heating rate
HR-ESI/MS
high-resolution electrospray ionization mass spectrometry
HRDL
high-resolution doppler lidar
HRLDAS
High-Resolution Land Data Assimilation System
HRMS
high-resolution mass spectrometry
HRRR
High-Resolution Rapid Refresh
HRToF-CIMS
high-resolution time-of-flight chemical ionization mass spectrometer
HSD
hydrometeor size distribution
HSFOVR
hemispherical field of view radiometer
HSI
hemispheric sky imager
HSRHI
hemispheric range height indicator
HSRL
high-spectral-resolution lidar
HSVD
hydrometeor velocity size detector
HTAP
Hemispheric Transport of Air Pollution emissions inventory
HTDMA
hygroscopic tandem differential mobility analyzer
HUCM
Hebrew University of Jerusalem Cloud Model
HULIS
humic-like substances
HUMEX -- I
Humidity Experiment - Infrared
HVPS
high-volume precipitation spectrometer
HWT
Hazardous Weather Testbed (NOAA)
HYSPLIT
Hybrid Single-Particle Lagrangian Integrated Trajectory
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IAM
incidence angle modifier
IAP
in situ aerosol profile
IARPC
Interagency Arctic Research Policy
IASC-AWG
International Arctic Science Committee-Atmosphere Working Group
IASI
infrared atmospheric sounding interferometer
IASOA
International Arctic Systems for Observing the Atmosphere
IATA
International Air Transport Association
IAV
interannual variability
IBTrACS
International Best Track Archive for Climate Stewardship
IC
ion chromatography
ICA
independent column approximation
ICARTT
International Consortium for Atmospheric Research on Transport and Transformation
ICARUS
Inaugural Campaigns for ARM Research using Unmanned Systems
ICE
Interface Configuration Experiment (no longer in use)
ICE-L
Ice in Clouds Experiment-Layers
ICE-T
Ice in Clouds Experiment-Tropical
ICECAPS
e Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit Program
ICI
Infrared Cloud Imager
ICL
integrated cloud liquid
ICOS
Integrated Carbon Observation System
ICP
inductively coupled plasma-based techniques
ICP-AES
inductively coupled plasma atomic emission spectroscopy
ICP-OES
inductively coupled plasma-optical emission spectroscopy
ICPR
integrated cross-polarization ratio
ICRCCM
Intercomparison of Radiation Codes in Climate Models
IDASS
integrated data assimilation and sounding system
IDEAS-2011
Instrumentation Development and Education in Airborne Science 2011 (NSF)
IDL
interactive data language
IDP
Instrument Development Program
IEEE
Institute of Electrical and Electronics Engineers
IF
intermediate frequency
IFA
intensive flux array
IFN
ice-forming nuclei
IFO
intensive field observation
IFOV
instantaneous field of view
IGAC
International Global Atmospheric Chemistry Project
IGBP
International Geosphere Biosphere Programme
IGOM
improved geometric optics method
IGR
inherent growth rate
IGS
International GNSS Service
IGW
inertio-gravity wave
IHOP
International H2O Project
IIDC
Instrumentation and Industrial Digital Camera
ILAMB
International Land Model Benchmarking
ILS
instrument line shape
ILW
integrated liquid water
IMB
Infrastructure Management Board
IMG
Interferometric Monitor of Greenhouse Gases
IMMS
Instrument Mentor Monthly Summary
IMPACT
Integrated Massively Parallel Atmospheric Chemistry Transport model
IMPROVE
Interagency Monitoring of Protected Visual Environments (U.S.) or Improvement of Microphysical Parameterization through Observational Verification Experiment
IMR
ice mixing ratio
IMS
Ice Mapping System
IN
ice nuclei
INCA
Interhemispheric difference in cirrus properties from anthropogenic emissions
INDOEX
Indian Ocean Experiment
INP
ice-nucleating particle
INPA
Instituto Nacional de Pesquisas da Amazonia
INPE
Instituto Nacional de Pesquisas Espaciais
INPOP
Ice Nucleating Particles at Oliktok Point
INS
Inertial Navigation System
INSTAAR
Institute of Arctic and Alpine Research
INTERACT
International Network for Terrestrial Research and Monitoring in the Arctic
IOP
intensive operational period
IOT
Internet of things
IPA
independent pixel approximation
IPAS
ice particle aggregate simulator
IPASRC
International Pyrgeometer and Absolute Sky-scanning Radiometer Comparison
IPC
International Pyrheliometer Comparison
IPCC
Intergovernmental Panel on Climate Change
IPEX
Intermountain Precipitation Experiment
IPHEX
integrated Precipitation and Hydrology Experiment
IPM
instrument performance model
IPY
International Polar Year
IR
infrared
IRF
instantaneous radiative flux
IRGA
infrared gas analyzer
IRICP
International Research Institute for Climate Prediction
IRIS
integrating sphere infrared radiometer
IRSI
infrared sky imager
IRT
infrared thermometer
IS
ice spectrometer
ISAN
isentropic analysis
ISAR
Infrared Sea Surface Temperature Autonomous Radiometer
ISCCP
International Satellite Cloud Climatology Project
ISDAC
Indirect and Semi-Direct Aerosol Campaign
ISLSCP
International Satellite Land Surface Climatology Project
ISM
Indian summer monsoon
ISMN
International Soil Moisture Network
ISO
International Organization for Standardization or intraseasonal oscillation
ISS
integrated sounding system
ISVHE
Intraseasonal Variability Hindcast Experiment
IT
instrument team
ITCZ
intertropical convergence zone
ITEX
International Tundra Experiment or Island Thunderstorm Experiment
ITF
Intertropical Front
ITOP
Intercontinental Transport of Ozone and Precursors experiment
ITP
Ice-tethered profiler
ITPP
International TOVS Processing Package
IVOC
intermediate-volatility organic compound
IWC
ice water content
IWP
ice water path
IWRF
Integrated Weather Radar Facility
IWV
integrated water vapor
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JACCS
Japanese Cloud and Climate Study
JAMSTEC
Japanese Marine Science and Technology Center
JASMINE
Joint Air-Sea Monsoon Interaction Experiment
JAXA
Japan Aerospace Exploration Agency
JD
Julian Day
JFD
joint frequency distribution
JISAO
Joint Institute for the Study of the Atmosphere and Ocean
JOSS
Joint Office for Science Support
JPEG
Joint Photographic Expert Group file format
JPL
Jet Propulsion Laboratory (NASA)
JPSS
Joint Polar Satellite System
JWD
Joss-Waldvogel disdrometer
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KDE
kernel density equivalent
KF-CuP
Kain--Fritsch cumulus potential
KNMI
Royal Netherlands Meteorological Institute
KSC
Kennedy Space Center (NASA)
KWAJEX
Kwajalein Experiment
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LABLE
Lower Atmospheric Boundary Layer Experiment
LAC
light-absorbing carbon
LACIS
Leipzig Aerosol Cloud Interaction Simulator
LACO
Laboratory for Aerosol and Cloud Optics
LAFE
Land-Atmosphere Feedback Experiment
LAI
leaf area index
LAII
land-atmosphere-ice-interactions
Lake-ICE
Lake-Induced Convection Experiment
LAMPAS
laser mass analysis of particles in the airborne state
LAMS
limited area models
LANCE
Land, Atmosphere Near real-time Capability for EOS (NASA)
LANDSAT-TM
Land Satellite Thematic Mapper
LANL
Los Alamos National Laboratory
LAOC
light-absorbing organic carbon
LAPS
Local Analysis and Prediction System
LARC
Langely Research Center (NASA)
LAS
laser aerosol spectrometer
LASE
Lidar Atmospheric Sensing Experiment
LASIC
Layered Atlantic Smoke Interactions with Clouds
LASPLAST
Leicester Along-Track Scanning Radiometer and Sea Surface Temperature Radiometer Processor for Land Surface Temperature
LASSO
LES ARM Symbiotic Simulation and Observation
LBA
Large-Scale Biosphere-Atmosphere Experiment in Amazonia
LBCL
liquid-bearing cloud layer
LBL
line-by-line
LBLRTM
Line-By-Line Radiative Transfer Model
LBNL
Lawrence Berkeley National Laboratory
LBTM
Layered Bispectral Threshold Method
LCL
lifting condensation level
LDAR
Lightning Detection and Ranging
LDN
Lightening Detection Network (U.S.)
LDR
linear depolarization ratio
LE
latent energy
LEADEX
Lead Experiment
LED
light-emitting diode
LED-CE-DOAS
light-emitting diode cavity-enhanced differential optical absorption spectroscopy
LEM
Lagrangian-Eulerian Model
LES
large-eddy simulation
LFC
level of free convection
LGM
last glacial maximum
LH
latent heat
LHF
latent heat flux
LI
lifted index
LIF
laser-induced fluorescence
LIFT
lidars in flat terrain
LIM
linear inverse model
LIMS
Limb Infrared Monitor of the Stratosphere
LIP
localized intensification of precipitation
LIRAD
lidar-infrared radiometer
LIS
Land Information System
LITE
Lidar In-space Technology Experiment
LLJ
low-level jet
LLNL
Lawrence Livermore National Laboratory
LMB
level of maximum buoyancy
LMD
Laboratoire de Meteorologie Dynamique or level of maximum detrainment
LMMS
laser microprobe mass spectrometry
LMOS
Lake Michigan Ozone Study
LMS
least median squares
LN
liquid nitrogen
LNA
low noise amplifier
LNB
level of neutral buoyancy
LoCo
Local Land-Atmosphere Coupling project
LOD
limit of detection
LP DAAC
Land Processes Distributed Active Archive Center
LPDM
Lagrangian Particle Dispersion Model
LPRM
Land Parameter Retrieval Model
LPVEX
Light Precipitation Validation Experiment
LRT
long-range transport or local recommendation team
LRU
lowest replaceable units (spare/replacement parts)
LS-SP-AMS
light-scattering soot particle aerosol mass spectrometer
LS3MIP
Land Surface, Snow and Soil Moisture Model Intercomparison Program
LSFEM
least-squares finite element method
LSM
Land Surface Model
LSP
land surface parameterization
LST
local solar time or land surface temperature
LTE
local thermodynamic equilibrium
LTER
Long-Term Ecological Research Network
LTS
lower tropospheric stability
LUC
land use category
LUCID
Land-Use and Climate, IDentification of robust impacts
LUE
light use efficiency
LULCC
land use and land cover change
LUMIP
Land Use Model Intercomparison Project
LUT
look up table
LV-OOA
low-volatility oxygenated organic aerosol
LVOC
low-volatility organic compound
LW
longwave
LWC
liquid water content
LWCF
longwave cloud forcing
LWE
liquid water equivalent
LWP
liquid water path
LWR
longwave radiation
LWSI
land surface water index
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M-O
Monin-Obukhov
M-PACE
Mixed-Phase Arctic Cloud Experiment
MAAP
multiple angle absorption photometer
MABNAG
Model for Acid-Base chemistry in NAnoparticle Growth
MAC
mass absorption cross-section or mass absorption coefficient
MACC
Monitoring Atmospheric Composition and Climate
MACE
Multi-Spectral Atmospheric Column Extinction
MACPEX
Middle Latitude Airborne Cirrus Properties Experiment
MADE
Model Aerosol Dynamics Model for Europe
MADRID
Model of Aerosol Dynamics, Reaction, Ionization, and Dissolution
MAE
mass absorption efficiency or mean absolute error
MAERI
marine atmospheric emitted radiance interferometer
MAGIC
Marine ARM GPCI Investigation of Clouds
MAGICC
Measurement of Atmospheric Gases Influencing Climate Change
MAM
Model Aerosol Model
MAPP
Modeling, Analysis, Prediction and Projection (NOAA program) or microphysical aerosol properties from polarimetry
MAPR
multiple antenna profiling radar
MAPS
Mesoscale Analysis and Prediction System
MAQNET
multi-scale air quality network (no longer in use)
MARCUS
Measurement of Aerosols, Radiation and Clouds over the Southern Oceans
MAS
MODIS airborne simulator
MASC
Multi-Angle Snowflake Camera
MASE
MArine Stratus Experiment
MASRAD
Marine Stratus Radiation Aerosol and Drizzle
MAST
Monterey Area Ship Track Experiment
MATCH
Model for Atmosphere Transport and Chemistry
MAX-Mex
Megacity Aerosol eXperiment - Mexico City
MBA
marine biogenic aerosol
MBL
marine boundary layer
MC3E
Midlatitude Continental Convective Clouds Experiment
MCAO
marine cold air outbreak
MCBH
multiple cloud base height
MCC
mesoscale convective complex
MCE
modified combustion efficiency
MCICA
Monte Carlo Independent Column Approximation
MCIDAS
man-computer interactive data analysis system
MCM
Master Chemical Mechanism
MCS
mesoscale convective system
MCSST
multichannel sea surface temperature
MCTEX
Maritime Continent Thunderstorm Experiment
MDF
model-data fusion
MDN
meta data navigator
mdr
minimum detectable radiance
MDS
meta data system
MDTERP
Maryland Terrestrial Radiation Package
MDV
mean Doppler velocity
ME
modulation efficiency
MED
mass equivalent diameter
MEE
mass extinction efficiency
MEFO
Manitou Experimental Forest Observatory
MEGAN
Model of Emissions of Gases and Aerosols from Nature
MERIS
medium-resolution imaging spectrometer
MERRA
Modern Era Retrospective Analysis for Research and Applications
MESH
maximum expected size of hail
MET
Meteorological Instrumentation at AMF
MetUM
Met Office Unified Model (UK)
MEX
Mexico City
MFC
moisture flux convergence
MFP
mean-free-path
MFR
multi-filter radiometer
MFRIRT
multifilter radiometer and infrared thermometer
MFRSR
multi-filter rotating shadowband radiometer
MHS
Microwave Humidity Sounder
MHz
megahertz
MICRE
Macquarie Island Cloud and Radiation Experiment
MidCiX
Midlatitude Cirrus Experiment
MILAGRO
Megacity Initiative: Local and Global Research Observations
MIMD
multiple instruction multiple data
MIP
model intercomparison project
MIPS
mobile integrated profiling system
MIR
millimeter-wave imaging radiometer
MIROC
Model for Interdisciplinary Research on Climate
MIRS
Microwave Integrated Retrieval System
MISMO
Mirai Indian Ocean Cruise for the Study of the MJO Convection Onset
MISO
monsoon intraseasonal oscillation
MISR
multi-angle imaging spectroradiometer
MISS
mobile integrated sounding system
MIZ
marginal ice zone
MIZOPEX
Marginal Ice Zone Observations and Processes Experiment
MJO
Madden-Julian Oscillation
MJY
Mellor-Yamada-Janjic (a PBL modeling scheme)
ML
mixing layer or melting layer
MLD
mixed-layer depth
MLS
mid-latitude summer or microwave limb sounder
MLW
mid-latitude winter
MM
mobile mesonet
MM5
Mesoscale Meteorology model version 5
MMCR
millimeter wave cloud radar or multimode cloud radar
MMD
mean mass diameter
MMF
multi-scale modeling framework
MMTP
microwave temperature profiler
MNMB
modified normalized mean biases
MOA
memorandum of agreement
MOAS
Microwave Oxygen Absorption Study
MODIS
moderate-resolution imaging spectroradiometer
MODM
monochromatic optical depth
MODTRAN
moderate-resolution atmospheric radiance and transmittance model
MOI
micro-orifice impactor
MOLTS
model output location time series
MOP
memorandum of participation
MOPA
master oscillator power amplifier
MOPD
maximum optical path difference
MOPEX
Model Parameter Estimation Experiment
MOPITT
measurements of pollution in the troposphere
MOR
Meteorological Optical Range
MOSAiC
Multidisciplinary Drifting Observatory for the Study of Arctic Climate
MOST
Monin-Obukhov similarity theory
MOU
memorandum of understanding
MOUDI
micro-orifice uniform deposit impactor
MOVI
micro-orifice volatilization impactor
MOZAIC
Measurement of Ozone and Water Vapor by Airbus in-service Aircraft
MOZART
Model for Ozone and Related chemical Tracers
MPAS
Model for Prediction Across Scales
MPC
mixed-phase cloud
MPE
maximum permisiable exposure or multisensor precipitation estimate
MPEG
Moving Picture Expert Group file format
MPEX
Mesoscale Predictability Experiment
MPI
Max Planck Institute
MPIC
Max Planck Institute for Chemistry
MPIR
multi-spectral pushbroom imaging radiometer
MPL
micropulse lidar
MPM
Millimeter-wave Propagation Model
MRAS
mesoscale radiatively-induced anvil spreading
MRC
Mission Research Corporation
MRF
medium-range forecast
MRG
mixed Rossby-gravity
MRI
Meteorological Research Institute
MRMS
multi-radar multi-sensor
MRO
maximum-random overlap
MRR
micro rain radar
MS
marine stratus
MS-DA
Multiscale Data Assimilation
MSC
multichannel scaler card
MSE
moist static energy
MSFES
Mie solution for equivalent spheres
MSG
Meteosat Second Generation
MSL
mean sea level
MSLP
mean sea level pressure
MSMM
measurement system maturity matrix
MSS
multi-spectral scanner
MSSA
multi-channel singular spectral analysis
MsTMIP
Multi-scale Synthesis & Terrestrial Model Intercomparison Project
MSX
Mid-Course Space Experiment
MTP
microwave temperature profiler
MTVDI
Modified Temperature Vegetation Dryness Index
MWISP
Mount Washington Icing Sensors Program
MWMFOC
multi-wavelength multifield of view
MWR
microwave radiometer
MWR3C
microwave radiometer, 3-channel
MWRP
microwave radiometer profiler
MWSR
microwave water substance radiometer
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N-ICE
Norwegian Young Sea Ice Experiment
NAAMES
North Atlantic Aerosols and Marine Ecoystems Study
NAAPS
Navy Aerosol Analysis and Prediction System
NAAQS
National Ambient Air Quality Standard
NADA
North American Drought Atlas
NAEI
National Atmospheric Emissions Inventory (UK)
NAM
North American Model
NAME
Nocturnal Avian Migration Experiment or North American Monsoon Experiment
NAMMA
NASA African Monsoon Multidisciplinary Analyses
NAMS
nanoaerosol mass spectrometer
NAO
North Atlantic Oscillation
NARE
North Atlantic Regional Experiment
NARL
Naval Arctic Research Laboratory
NARR
North American Regional Reanalysis
NAS
National Academy of Science (U.S.)
NASA
National Aeronautics and Space Administration
NASDA
Japanese National Space Development Agency
NAST-I
NPOESS Aircraft Sounding Testbed-Interferometer
NATO
North Atlantic Treaty Organization
NAVGEM
Navy Global Environmental Model
NAVMETOC
Naval Meteorology and Oceanography
NBL
nocturnal boundary layer
NBP
net biosphere productivity
NCAR
National Center for Atmospheric Research
NCAS
NOAA Center for Atmospheric Sciences or National Centre for Atmospheric Science (UK)
NCDC
National Climatic Data Center
NCEI
National Centers for Environmental Information
NCEO
National Centre for Earth Observation (UK)
NCEP
National Centers for Environmental Prediction
NCEP GFS
National Centers for Environmental Prediction Forecasting System
NCFR
narrow cold-front rainband
NCP
Normalized Coherent Power
NDACC
Network for the Detection of Atmospheric Composition Change
NDNR
normalized differences of nadir reflectivity
NDSVI
normalized difference senescent vegetation index
NDTI
normalized difference tillage index
NDVI
Normalized Difference Vegetation Index
NEAQS
New England Air Quality Study
NEAX
Northeast Aerosol Experiment
NEDIS
National Environmental Satellite Data and Information Service (NOAA)
NEE
net ecosystem exchange
NEI
National Emissions Inventory (U.S. EPA)
NEON
National Ecological Observatory Network
NEP
noise equivalent power or net ecosystem production
NEPA
National Environmental Policy Act of 1969
NERC
National Environment Research Council (UK)
NERSC
National Energy Research Scientific Computing Center (DOE)
NESDIS
National Environmental Satellite, Data, and Information Service
NetCDF
Network Common Data Form
NEXRAD
next-generation weather radar
NFOV
narrow field of view
NGA
National Geospatial-Intelligence Agency
NGEE
Next-Generation Ecological Experiment or Next-Generation Ecosystem Experiments
NGMS
Normalized Gross Moist Stability
NGS
National Geodetic Survey
NH-SCE
Northern Hemisphere Snow Cover Extent data set
NIC
noninductive charging
NICAM
Nonhydrostatic Icosahedral Atmospheric Model
NIDS
NEXRAD Information Dissemination Service
NIEHS
National Institute of Environmental Health Sciences
NIES
Nauru Island Effect Study
NIGEC
National Institute for Global Environmental Change
NILU
Norwegian Institute of Air Research
NIMFR
normal incidence multifilter radiometer
NIP
normal incidence pyrheliometer
NIPA
nonlocal independent pixel approximation
NIR
near infrared
NIST
National Institute of Standards and Technology
NLCD
National Land Cover Dataset
NLDN
National Lightning Detection Network
NLLJ
nocturnal low-level jet
NMASS
nucleation mode aerosol size spectrometer
NMC
National Meteorological Center
NMI
nonlinear multiscale interaction
NMQ
National Mosaic and Multisensor Quantitative Precipitation Estimation project
NMVOC
non-methane volatile organic compound
NNLS
non-negative least squares
NOA
nitrogen-enriched organic aerosol
NOAA
National Oceanic and Atmospheric Administration
NOCS
National Oceanography Centre, Southampton (UK)
NOGAPS
Navy Operational Global Atmospheric Prediction System
NOMADS
National Operational Model Archive and Distribution System (NOAA)
NORAD
North American Aerospace Defense Command
NORAPS
Navy Operational Regional Prediction System
NPF
new particle formation
NPFS
New Particle Formation Study
NPI
Norwegian Polar Institute
NPOESS
National Polar orbiting Operational Environmental Satellite System
NPOL
NASA Polerametric radar site in rutherford County, North Carolina
NPP
Net Primary Productivity
NR
noonrefractory
NRB
normalized relative backscatter
NRBC
NCAR radiation bias correction
NRCS
Natural Resources Conservation Service or normalized radar cross-section
NREL
National Renewable Energy Laboratory
NSA
North Slope of Alaska
NSA/AAO
North Slope of Alaska and Adjacent Arctic Ocean
NSB
North Slope Borough
NSE
Nash-Sutcliffe Efficiency
NSERC
Natural Sciences and Engineering Research Council (Canada)
NSF
National Science Foundation
NSIDC
National Snow and Ice Data Center
NSSL
National Severe Storms Laboratory
NTBC
narrow-to-broadband-conversion
NTP
Network Time Protocol
NU-WRF
NASA Unified Weather Research and Forecasting model
NUCAPS
NOAA-Unique Combined Atmospheric Processing System
NVAP
NASA Water Vapor Project
NVDI
normalized difference vegetation index
NWO
Netherlands Organization for Scientific Research
NWP
numerical weather prediction
NWS
National Weather Service
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OA
organic aerosol
OAII
Ocean-Atmosphere-Ice-Interactions
OAP
optical array probe
OASIS
Ocean-Atmosphere-Sea-Ice-Snow experiment
OC
organic carbon
OCO
Orbiting Carbon Observatory
OCS
Oklahoma Climatological Society
OD
optical depth
ODAS
Ocean Data Assimilation System
ODE
ozone depletion event or ordinary differential equation
ODEQ
Oklahoma Department of Environmental Quality
ODR
Orthogonal Distance Regression
ODS
ozone-depleting substance
OFR
oxidation flow reactor
OGP
Office of Global Programs
OIN
other inorganic material
OISST
Optimum Interpolation Sea Surface Temperature
OKM
Oklahoma Mesonet
OLR
outgoing longwave radiation
OLYMPEX
Olympic Mountain Experiment
OM
organic matter
OMAERUV
OMI/Aura Aerosol Optical Thickness & Single Scattering
OMB
Office of Management and Budget
OMI
Ozone Monitoring Instrument
OMT
ortho-mode transducer
OMWOG
Oceans-based Measurements Working Group
ONI
Oceanic Nino Index
ONR
Office of Naval Research
OOA
oxygenated organic aerosol
OPAC
Optical Properties of Aerosols and Clouds software package
OPC
optical particle counter
ORACLES-2016
Observations of Aerosols above Clouds and their Interactions-2016
ORG
optical rain gauge
ORNL
Oak Ridge National Laboratory
ORR
Operational Readiness Review
OSS
Operations Status System
OSSE
observation simulation system experiments
OSTIA
Operational Sea Surface Temperature and Sea Ice Analysis
OSU
Oklahoma State University
OTDMA
organic tandem differential mobility analyzer
OVOC
oxygenated volatile organic compound
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PA
photoacoustic
PABSI
profiling oxygen A-band spectrometer/visible integer
PAH
polycyclic aromatic hydrocarbon
PalEON
Paleo-Ecological Observatory Network
PALMS
particle analysis by laser mass spectrometry
PALS
Protocol for the Analysis for Land Surface models
PAM
portable automated mesonet
PAMTRA
Passive and Active Microwave radiative TRAnsfer model
PAPE
perturbation available potential energy
PAQS
Pittsburgh Air Quality Study
PAR
photosynthetically active radiation
PaRaDIso
Payerne Radar and Isotopes
PARAGON
Progressive Aerosol Retrieval and Assimilation Global Observing Network
PARSIVEL
Particle Size and Velocity disdrometer
PARSL
Pacific Northwest National Laboratory's Atmospheric Remote Sensing Laboratory
PartMc-MOSAIC
Particle Monte Carlo-Model for Simulating Aerosol Interactions and Chemistry
PAS
photo-acoustic absorption spectrometer
PAS2000CE
photoelectric aerosol sensor
PASCAL
Physical Feedbacks of Arctic Planetary Boundary Level Sea Ice, Cloud and Aerosol
PASS
Parameterization of Subgrid Scale
PASS-3
3-wavelength photo-acoustic soot spectrometer
PAX
photoacoustic extinctiometer
PBAP
primary biological aerosol particle
PBL
planetary boundary layer
PBO
Plate Boundary Observatory
PCASP
passive cavity aerosol spectrometer probe
PCB
printed circuit board
PCI
pressure control inlet
PCMDI
Program for Climate Model Diagnosis and Intercomparison
PCN
Permafrost Carbon Network
PCP
programmable compressor package
PCTM
Parameterized Chemical Transport Model
PCVI
pumped counterflow virtual impactor
PDF
probability distribution function or Portable Document Format
PDL
polarization diversity lidar
PDR
Preliminary Design Review
PDSI
Palmer drought severity index
PECAN
Plains Elevated Convection at Night
PEEX
Pan Eurasian Experiment
PEGASUS
PNNL Eulerian Gas and Aerosol Scalable Unified System
PERSIANN
Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks
PET
potential evapotranspiration
PFT
plant functional type
PGS
Precision Carbon Dioxide Mixing Ratio System or precision gas system
PHI
probabilistic hazard information
PHIPS
Particle Habit Imaging and Polar Scattering probe (Karlsruhe Institute of Technology)
PI
principal investigator
PI-Neph
Polarized Imaging Nephelometer
PIA
path-integrated attenuation
PICASSO-CENA
Pathfinder Instruments for Cloud and Aerosol Spaceborne Observations-Climatologie Etendue des Nuages et des Aerosols
PID
particle identification algorithm
PIF
problem identification form
PILPS
Project for the Intercomparison of Land-Surface Parameterization Schemes
PILS
particle-into-liquid sampler
PILS-IC
particle-into-liquid sampler coupled to ion chromatographs
PIP
Particle Imaging Package (NASA) or precipitation imaging package or primary ice production
PIR
precision infrared radiometer
PIRAQ
PC-integrated acquisition system
PISA
PECAN Integrated Sounding Array
PIXE
proton-induced X-ray emission
PKE
perturbation kinetic energy
PLUMBER
PALS Land Surface Model Benchmarking Evaluation Project
PM
particulate matter
PMEL
Pacific Marine Environmental Laboratory
PMF
positive matrix factorization
PML
perfectly matched layer
PMM
Pacific Measurement Mission (NASA)
PMO
Pico Mountain Observatory
PMS
particle measuring system
PMW
passive microwave
PNC
particle number concentration
PNG
Portable Network Graphics file format or Papua New Guinea
PNNL
Pacific Northwest National Laboratory
PNSD
particle number size distribution
POA
primary organic aerosol
POC
particulate organic carbon
POD
probability of detection
POES
polar orbiting environmental satellite
POFA
probability of false alarm
POLARCAT
Polar Study using Aircraft, Remote Sensing, Surface Measurements and Models, of Climate, Chemistry, Aerosols, and Transport
POLARIS
Photochemistry of Ozone Loss in the Arctic Region in Summer
POLDER
Polarization and Directionality of the Earth's Reflectances
POLMIP
POLARCAT Model Intercomparison Project
POM
primary organic matter
POPEYE
Profiling at Oliktok Point to Enhance YOPP Experiments
POPS
printed optical particle spectrometer
PPA
plane parallel approximation
PPP
point-to-point protocol
PR
precipitation radar
PRB
Problem Review Board
PRE-STORM
Preliminary Regional Experiment for Stormscale Operational and Research Meteorology
PRF
pulse repetition frequency
PRISM
Parameter elevation Regression on Independent Slopes Model
PROBE
Pilot Radiation Observation Experiment
PROF
profile
Promis
Program for an Operational Meteorological Information System (Swedish Meteorological and Hydrological Institute)
PRP
Portable Radiation Package or phase retarding plate
PRR
pre-readiness review
PSAP
particle/soot absorption photometer
PSD
particle size distribution
PSL
photo-stimulated luminescence or polystyrene latex
PSP
precision spectral pyranometer
PSU
Pennsylvania State University
PTI
photo-thermal interferometer
PTR-MS
proton transfer reaction mass spectrometer
PV or photovoltaic
potential vorticity
PVI
particle video imager
PW
precipitable water
PWD
present weather detector
PWGA
population-weighted global average
PWS
present weather sensor
PWV
precipitable water vapor
PX
Pleim-Xiu model
PYE
Point Reyes, California
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Q-AMS
quadrupole aerosol mass spectrometer
QC
Quality Control
QCLCD
Quality Controlled Local Climatological Data (NOAA)
QCRAD
Data Quality Assessment for ARM Radiation Data value-added product
QFF
quartz fiber filter
QL
Quantitative Links
QME
Quality Measurement Experiment
QMOM
quadrature method of moments
QMS
quadrupole mass spectrometer
QNSE
quasi-normal scale elimination
QPE
Quantitative Precipitation Estimation
QVP
quasi-vertical profile
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R/V
research vessel
re
effective radius
RACM
regional atmospheric chemistry mechanism
RACORO
Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations
RAD
Radiation Measurements at AMF
RADAGAST
Radiative Divergence using AMF, GERB and AMMA Stations
RAM
random access memory or root-zone available moisture
RAMIX
Radon Measurements of Atmospheric Mixing
RAMS
regional atmospheric modeling system
RAOB
radiosonde observation
RAOS
Reno Aerosol Optics Study
RAP
Rapid Refresh model (NCEP)
RAPRAD
rapid radiation transfer model
RASS
radio acoustic sounding system
RAW
data file created by an instrument
RaXPol
Rapid X-band Polarimetric Radar
RBF
radial basis function
RBL
remote balloon launching
RCC
radiometer calibration and characterization
RCCL
Royal Caribbean Cruise Lines
RCE
radiative-convective equilibrium
RCF
radiometer calibration facility
RCS
remote cloud sensing
RCSA
revised convective stratiform anvil
RDI
rotating drum impactor
RDP
Research and Development Project
REBS
radiation energy balance system
RED
relative Euclidean distance
REDDIC
Retrieval of Entrainment and Droplet Density in Cumulus
REFIR-PAD
Radiation Explorer in the Far-Infrared-Prototype for Applications and Development
RegCM2
regional climate model, Version 2 (NCAR)
RELAMPAGO
Remote sensing of Electrification, Lightning, and Mesoscale/microscale Processes with Adaptive Ground Observations
RESET
Regional Service Team (TWP)
RF
radio frequency
RFA
radiative flux analysis
RFD
relative frequency distribution
RFO
relative frequency of occurrence
RGA
reduction gas analyzer or Rayleigh-Gans approximation
RH
relative humidity
RHC
relatively highly reactive hydrocarbon
RHI
range-height indicator
RHR
radiative heating rate
RHUBC
Radiative Heating in Underexplored Bands Campaign
RHUBC-II
Radiative Heating in Underexplored Bands Campaign, Phase II
RI
refractive index
RICO
Rain in Cumulus over the Ocean
RIE
relative ionization efficiency
RINEX
Receiver Independent Exchange Format
RIS
Ross Ice Shelf
RISC
Russian Ice Station Comparison
RISCAM
Routine In Situ Cloud and Aerosol Measurements
RK
residual kriging
RL
Raman lidar
RLWP
rain liquid water path
RMA
reduced-major-axis
RMM
real-time multivariate MJO
rms
root mean square
RMSE
root-mean-square error
ROCS
Rocky Mountain Organic Carbon Study
ROI
radius of influence
ROM
rough order of magnitude or regional oxidant model
RoMBAS
Rocky Mountain Biogenic Aerosol Study
RONOCO
Role of Night-time chemistry in controlling the Oxidising Capacity Of the atmosphere (U.K. university project)
ROSR
remote ocean surface radiometer
RPA
remotely piloted aircraft
RPH
roll, pitch, and heave
RPV
remotely piloted vehicles
RR
rain rate
RRC
rainfall-rate criteria
RRM
regionally refined model
RRTM
rapid radiative transfer model
RSD
relative standard deviation
RSMAS
Rosenstiel School of Marine and Atmospheric Science
RSP
research scanning polarimeter
RSS
rotating shadowband spectroradiometer
RT
radiative transfer
RTA
residence time analysis
RTD
resistive temperature device or resistance temperature detector
RUC
rapid update cycle
RVS
Riverside, California
RWC
rain water content
RWP
radar wind profiler
RZSM
root-zone soil moisture
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S-XRF
synchrotron-induced X-ray fluorescence spectrometry
SABL
scanning aerosol backscatter lidar
SABLE
Surface Atmospheric Boundary Layer Experiment
SABOR
Ship-Aircraft Bio-Optical Research
SAC
Site Advisory Committee
SACOL
Semi-Arid Climate and Environment Observatory of Lanzhou University
SACZ
southern Atlantic convergence zone
SAGE
Stratospheric Aerosol and Gas Experiment
SAIC
Science Application International Corporation
SAL
supercontinuum absorption lidar or Saharan air layer
SALLJ
South American low-level jet
SAM
Sun and Aureole Measurement or System for Atmospheric Modeling
SAMEX
Storm and Mesoscale Ensemble Experiment or System for Atmospheric Modeling-Explicit Microphysics
SAO
Smithsonian Astrophysical Observatory
SAON
Sustaining Arctic Observing Networks
SAPHIR
Sondeur Atmospherique du Profil d'Humidite Intertropicale par Radiometrie
SAPRC
Statewide Air Pollution Research Center (University of California)
SAR
synthetic aperture radar or search and rescue
SARA
Simplified Aerosol Retrieval Algorithm
SARB
Surface and Atmospheric Radiation Budget
SARS
Site Access Request System
SAS
sub-arctic summer or Simplified Arakawa-Schubert
SatCORPS
Satellite Cloud and Radiation Property retrieval System
SAV
surface-area-to-volume ratio
SAW
sub-arctic winter
SBD
short-burst data
SBDART
Santa Barbara DISORT Atmospheric Radiative Transfer
SBIR
Small Business Innovation Research (grant)
SBJ
Sierra Barrier Jet
SBL
stable boundary layer
SBM
spectral bin microphysics
Sc
stratocumulus
SCAM
Single-Column Atmosphere Model
SCAN
Soil Climate Analysis Network
SCAR-B
Smoke, Clouds, and Radiation-Brazil
ScaRaB
Scanner for Radiation Budget
SCCN
size-resolved cloud condensation nuclei
SCE
stochastic collection equation
SciDAC
Scientific Discovery through Advanced Computing (DOE)
SCLW
supercooled liquid water
SCM
single-column model
SCMS
Small Cumulus Microphysics Study
SCNNLS
smoothness constrained non-negative least squares
SCOPE
San Clemente Ocean Probing Experiment
SCOW
Scatterometer Climatology of Ocean Winds
SCSI
small computer system interface
SCSMEX
South China Sea Monsoon Experiment
SCT
stratocumulus-to-cumulus transition
SDIRK
Singly Diagonally Implicit Runge-Kutta method
SDM
superdroplet method
SDS
site data system
SDSS
self-deploying surface sensor
SEAC4RS
Studies of Emissions and Atmospheric Composition, Clouds, and Climate Coupling by Regional Surveys
SEARCH
Study of Environmental Arctic Change
SEBEX
Sahelian Energy Balance Experiment
SEBS
Surface Energy Balance System
SEC
South Equatorial Current
SECC
South Equatorial Countercurrent
SEM
scanning electron microscopy
SERRS
surface-enhanced resonance Raman spectroscopy
SERS
surface-enhanced Raman spectroscopy
SESI
Science and Engineering Services, Inc.
SEVIRI
Spinning Enhanced Visible and InfraRed Imager
SFMR
stepped frequency microwave radiometer
SGMM
self-generating master mechanism
SGP
Southern Great Plains
SHARPpy
Sounding/Hodograph Analysis and Research Program in Python
SHAVE
Severe Hazard Analysis and Verification Experiment
SHAWMS
Soil Heat And Water Measurement System
ShCu
shallow cumulus
SHDOM
Spherical Harmonic Discrete Ordinate Method
SHEBA
Surface Heat Budget of the Arctic Ocean (Subprogram of NSF ARCSS Oil)
SHF
sensible heat flux
SHOC
simplified higher-order closure
SiB2
simple biosphere model
SiBCASA
simple biosphere Carnegie-Ames-Stanford Approach
SIBYL
Selective Iterated Boundary Location scheme
SIC
sea ice concentration
SIE
sea ice extent
SIMD
single instruction multiple data
SIMS
secondary ion mass spectrometry
SINT
solar-infrared near-infrared technique
SIP
secondary ice production
SIROS
solar and infrared observing system
SIRS
solar infrared radiation station
SIRTA
Site Instrumental de Recherche par Teled'etrection Armospherique
SISC
Science and Infrastructure Steering Committee
SIST
solar-infrared split-window technique
SITAC
Spectral Imagery Technology Applications Center
SKYRAD
sky radiometers on stand for downwelling radiation
SL
stable precipitation over land
SL3D
storm labeling n three dimensions
SLAM
Simple Land-Atmosphere Model
SLP
sea level pressure
SLR
scanning Raman lidar
SLSTR
Sea and Land Surface Temperature Radiometer
SM
soil moisture
SMACS
Smart Aerosonde Clusters
SMAP
Soil Moisture Active Passive mission (NASA)
SMART-R
Shared Mobile Atmospheric Research and Teaching Radar
SMB
surface mass balance
SMC
stratiform mixed-phase cloud
SMCS
separated MCS
SMEAR
Station for Measuring Ecosystem-Atmosphere Relations (Finland)
SMET
Surface Meteorological Instruments for TWP
SMILES
simplified molecular-input line-entry system
SML
surface microlayer
SMM
soil moisture memory
SMMR
scanning multichannel microwave radiometer
SMOKE
Sparse Matrix Kernel Emissions model
SMOPS
Soil Moisture Operations Products System
SMOS
Surface Meteorological Observing Station or Soil Moisture and Ocean Salinity
SMPS
scanning mobility particle sizer
SNACS
Studies of the Northern Alaskan Coastal System
SNEX
Snowfall Experiment (BAECC)
SNICAR
Snow, Ice and Aerosol Radiation model
SNL
Sandia National Laboratories
SNOTEL
Snowpack Telemetry
SNPP
Suomi National Polar-Orbiting Partnership
SNR
signal-to-noise ratio
SOA
secondary organic aerosol
SOAG
semivolatile organic gas-phase species
SOAS
Southern Oxidant and Aerosol Study
SoCAB
Southern California Air Basin
SOCCR
State of the Carbon Cycle Report
SOFIA
Surface of the Ocean, Fluxes, and Interactions with the Atmosphere
SOL
site operations log *Now known as metadata system (MDS)
SOM
slab ocean model or self-organizing map
SOP
special observing period
SOPAC
South Pacific Applied Geoscience Commission
SORCE
Solar Radiation and Climate Experiment
SORGAM
Secondary Organic Aerosol Model
SORTI
solar radiance transmittance interferometer
SOS
Southern Oxidants Study
SOW
statement of work
SP-AMS
Soot Particle--Aerosol Mass Spectrometer
SP2
single particle soot photometer
SPA
Storm-penetrating aircraft
SPADE
Separate Physics and Dynamics Experiment or Stratospheric Photochemistry, Aerosols, and Dynamics Experiment
SPARC
Space Science and Engineering Center Portable Atmospheric Research Center
SPARTICUS
Small Particles in Cirrus
SPC
Storm Prediction Center (NOAA)
SPCZ
South Pacific convergence zone
SPECTRE
Spectral Radiance Experiment
SPICE
Solid Precipitation Intercomparison Experiment (WMO)
SPIE
Society of Photo-optic Instrumentation Engineers
SPL
Storm Peak Laboratory
SPLAT
single-particle laser ablation time-of-flight mass spectrometer
SPLAT-II
second-generation single-particle laser ablation time-of-flight mass spectrometer
SPM
site program manager
SPN
sunshine pyranometer
SPREP
South Pacific Regional Environmental Program
SPRGN
South Pacific Regional GPS Network
SQI
signal quality index
SR-XRF
synchrotron radiation-induced X-ray fluorescence spectrometry
SRB
surface radiation budget
SRDB
solar radiation dry bias
SRH
storm-relative helicity
SRL
scanning raman lidar
SRRB
Surface Radiation Research Branch (NOAA)
SRTM
Shuttle Radar Topography Mission
SS
supersaturation
SSA
single-scattering albedo or sea spray aerosol
SSCL
suppressed shallow cloud regime
SSD
snowflake size distribution
SSEC
Space Science and Engineering Center
SSFR
solar spectral flux radiometer
SSHF
surface sensible heat flux
SSM/I
special sensor microwave/imager
SSMIS
special sensor microwave imager sounder
SSP
scanning spectral polarimeter or sea spray particles
SSPA
solid-state power amplifier
SSPM
stretched scattering potential method
SSRGA
self-similar Rayleigh-Gans approximation
SSST
sea surface (skin) temperature
SST
sea-surface temperature
SSURGO
Soil Survey Geographic (database)
StaBLE
Stable Boundary Layer Education
STAC
size-to-area conversion
START08
Stratosphere-Troposphere Analyses of Regional Transport 2008
STE
stratosphere-troposphere exchange
STEC
Science Team Executive Committee (no longer in use)
STEM
Sulfur Transport Eulerian Model or scanning transmission electron microscopy
STEPS
Severe Thunderstorm Electrification and Precipitation Study
STI
simple tillage index
STILT
Stochastic Time-Inverted Lagrangian Transport
STORM-FEST
Stormscale Operational Research and Meteorology Fronts Experiment Systems Test
STORMVEX
Storm Peak Lab Cloud Property Validation Experiment
STP
standard temperature and pressure
STRAT
Stratospheric Tracers of Atmospheric Transport
STXM/NEXAFS
scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy
SUCCESS
Subsonic Aircraft Contrail and Cloud Effects Special Study
SUNY
State University of New York
SUPG
streamline upwind Petrov Galerkin method
SURFRAD
Surface Radiation Budget Network
SURTHREF
Surface Temperature and Humidity Reference System for Sondes
SV-OOA
semi-volatile oxygenated organic aerosol
SV-TAG
semi-volatile thermal desorption aerosol gas chromatograph
SVC
subvisible cirrus
SVD
singular value decomposition
SVOC
semi-volatile organic compound
SVOOA
semi-volatile oxygenated organic aerosol
SW
shortwave
SWACR
Scanning W-band ARM Cloud Radar
SWATS
soil water and temperature system
SWC
snow water content
SWCF
shortwave cloud forcing
SWDI
severe weather data inventory (NCEI)
SWE
snow water equivalent
SWERUS-C3
Swedish-Rssian-U.S. Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions
SWI
soil wetness index
SWIR
shortwave infrared
SWR
shortwave radiation
SWS
shortwave spectroradiometer
SWV
slant water vapor
SZA
solar zenith angle
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TAB
total attenuated backscattering
TACTIC
Tropospheric Aerosols for Climate in CNRM-CM
TAFTS
tropospheric airborne Fourier transform spectrometer
TAMU
Texas A&M University
TANSO-FTS
Thermal and Near infrared Sensor for Carbon Observation Fourier Transform Spectrometer
TAO
Tropical Atmosphere Ocean
TAOS
two-dimensional angular optical scattering
TAR
Tape ARchive
TARFOX
Tropospheric Aerosol Radiative Forcing Observational Experiment (1996)
TAS
true air speed
TB
tar balls
TBM
terrestrial biogeochemical model
TBS
tethered balloon system
TC
tropical cyclone
TC-RSR
thin-cloud rotating shadowband radiometer
TC4
Tropical Composition, Cloud and Climate Coupling
TCAP
Two-Column Aerosol Project
TCC
total cloud cover
TCCON
Total Carbon Column Observing Network
TCIP
Transit Communications Interface Profiles
TCWV
total column water vapor
TD
thermodenuder or thermal desorption
TD-LIF
thermal dissocation laser-induced fluorescence
TDCIMS
thermal desorption chemical ionization mass spectrometer
TDDR
total direct diffuse radiometer
TDL
Tactical Data Link
TDLAS
tunable diode laser absorption spectrometer
TDMA
time division multiple access (from ARM acronym list); also tandem differential mobility analyzer
TDWR
terminal Doppler weather radar (FAA)
TEA
transverse-excited atmospheric pressure
TEC
thermoelectric cooler
TEJ
tropical easterly jet
TEM
transmission electron microscope or trajectory ensemble model
TEM/EELS
transmission electron microscopy/electron energy loss spectroscopy
TERS
tip-enhanced Raman spectroscopy
TES
tropospheric emission spectrometer or thermal emission sounder or Terrestrial Ecosystem Science
TexAQS
Texas Air Quality Study
THF
turbulent heat flux
THOR
Thickness from Offbeam Returns
THORPEX
The Observing System Research and Predictability Experiment (no longer in use)
THWAPS
temperature, humidity, winds, and pressure system
TI
transverse ionization
TIBL
thermal internal boundary layer
TIC
total ion count
TICFIRE
Thin Ice Clouds in Far IR Experiment
TILDAS
Tunable Infrared Laser Differential Absorption Spectrometer
TIMEX
Thunderstorm Initiation Mobile Experiment
TIPA
tilted independent pixel approximation
TIR
thermal infrared
TIROS
television and infrared observation satellite
TIWE
Tropical Instability Wave Experiment
TKE
turbulent kinetic energy
TM
thematic mapper
TMI
Tropical Rainfall Measurement Mission (TRMM) Microwave Imager
TOA
top of the atmosphere
TOAR
Tropospheric Ozone Assessment Report
TOC
total organic carbon
TOCS
Tropical Ocean Climate Study
TOGA
trace organic gas analyzer
TOGA-COARE
Tropical Ocean Global Atmosphere-Coupled Ocean Atmosphere Response Experiment
TOMS
total ozone mapping experiment spectrometer
TOPAZ
tunable ozone profiler for aerosol and ozone
TOVS
TIROS operational vertical sounder
TP
temperature profiling
TPPN
Trans-Pacific Profiler Network
TPS
total precipitation sensor
TPW
total precipitable water
TRAC
time-resolved aerosol collector
TRACE-A
Transport and Atmospheric Chemistry near the Equator-Atlantic
TRACE-P
Transport and Chemical Evolution over the Pacific campaign (NASA)
TRI
Toxic Release Inventory (U.S. EPA)
TRL
technology readiness level
TRMM
Tropical Rainfall Measuring Mission
TRMM-KWAJEX
Tropical Rainfall Measuring Mission-Kwajalein Experiment
TRMM-LBA
Tropical Rainfall Measuring Mission Large-Scale Biosphere-Atmosphere Experiment in Amazonia
TROA
time-resolved optoacoustic (cell)
TROPOMI
Tropospheric Monitoring Instrument
TSBR
total solar broadband radiometer
TSI
total sky imager
TSP
total suspended particles
TTL
tropical tropopause layer
TUVR
total ultraviolet radiometer
TVC
total volume coverage
TWC
total water content or total water cloud
TWP
Tropical Western Pacific
TWP-ICE
Tropical Warm Pool International Cloud Experiment
TWST
three-waveband spectrally agile technique
TWT
traveling wave tubes
TWTA
Traveling Wave Tube Amplifier
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UAS
unmanned aerial system
UAV
unmanned aerospace vehicle
UAV-AERI
miniaturized version of the ground-based AERI
UCAR
University Corporation for Atmospheric Research
UCLA
University of California, Los Angeles
UCM
Urban Canopy Model
UCSD
University of California, San Diego
UDF
UAV demonstration flights
UEA
Universidade do Estado do Amazonia
UHI
urban heat island
UHMA
University of Helsinki Multicomponent Aerosol model
UHSAS
ultra-high-sensitivity aerosol spectrometer
UIC
Ukpeagvik Iñupiat Corporation
UIF
UAV interim flight
UIR
upwelling infrared radiometer
UMBC
University of Maryland, Baltimore County
UMR
unit mass resolution
UNAVCO
University NAVSTAR Consortium
UNESCO
United Nations Education, Scientific, and Cultural Organization
UNICON
unified convective scheme
UNIFAC
universal functional group activity coefficient
UPS
uninterruptable power supply
URIP
University Research Instrumentation Program
URL
Uniform Resource Locator
USB
Universal Serial Bus
USCG
United States Coast Guard
USCRN
U.S. Climate Reference Network
USDA
U.S. Department of Agriculture
USGCRP
U.S. Global Change Research Program
USGS
U.S. Geological Survey
USN
U.S. Navy
USP
Universidade de Sao Paulo
USR
upwelling solar radiation
UT
upper troposphere
UTH
upper tropospheric humidity
UV
ultraviolet
UV-APS
ultraviolet aerodynamic particle sizer
UVB
ultraviolet B
UVRL
ultraviolet Raman lidar
UVSR
ultraviolet spectral radiometer
UW-SSEC
University of Wisconsin Space Science and Engineering Center
UWLCM
University of Warsaw Lagrangian Cloud Model
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VAD
velocity-azimuth display
VAMOS
Variability of the American Monsoon System
VAP
value-added product
VarBC
variational bias correction
VBS
volatility basis set
VCEIL
Vaisala ceilometer
VCP
volume coverage pattern
VDA
variational data assimilation
VDM
vegetation demographic model
VED
volume equivalent diameter
VFR
volume fraction remaining or visual flight rules
VGA
video graphics array
VIIRS
Visible Infrared Imaging Radiometer Suite
VIMF
vertically integrated moisture flux
VIP
video integrator processor
VIPS
video ice particle sampler
VIRS
visible infrared scanning radiometer
VIS
visible or visible satellite imagery
VISST
visible infrared solar-infrared split-window technique
VLBI
very-long-baseline interferometry
VLF
very low frequency
VMR
volume mixing ratio
VNIR
visible/near infrared
VOAG
vibrating orifice aerosol generation
VOC
volatile organic carbon or volatile organic compound
VOCALS
VAMOS Ocean-Cloud-Atmosphere-Land Study
VOCALS-REX
Variability of the American Monsoon System (VAMOS) Ocean-Cloud-Atmosphere-Land Study Regional Experiment
VOCAR
variation of coastal atmospheric refractivity
VPD
vapor pressure deficit
VPN
virtual private network
VPR
vertically pointing radar
VSMOW
Vienna Standard Mean Ocean Water
VTLC
video time-lapsed camera
VTMX
Vertical Transport and Mixing Experiment
VUV
vacuum ultraviolet
VV
vertical velocity
VWS
vertical wind shear
VZA
viewing zenith angle
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WACR
W-band ARM Cloud Radar
WAIS
West Antarctic Ice Sheet
WAS
whole air sampling
WBF
Wegener-Bergeron-Findeisen process
WCB
warm conveyor belt
WCL
Wyoming cloud lidar
WCPC
water-based condensation particle counter
WCR
Wyoming cloud radar
WCRP
World Climate Research Programme
WCT
wavelet covariance transform
WDCA
World Data Center for Aerosols
WDSS-II
Warning Decision Support System-Integrated Information
WFOV
wide field of view
WHOI
Woods Hole Oceanographic Institution
WIBS
wide issue bioaerosol spectrometer
WIOC
water-insoluble organic carbon
WISG
World Infrared Standard Group
WISHE
wind-induced surface heat exchange
WISP
Winter Icing and Storms Project (NOAA)
WISPAR
Winter Storms and Pacific Atmospheric Rivers
WMO
World Meteorological Organization
WP
warm pool
WPDN
wind-profiler demonstration network
WPL
Wave Propagation Laboratory
WRC
World Radiation Center
WRF
Weather Research and Forecasting (Model)
WRF-Chem
chemistry version of the Weather Research and Forecasting model
WRF-STILT
Weather Research and Forecasting-Stochastic Time-Inverted Lagrangian Transport
WRR
World Radiometric Reference
WSFO
Weather Service Forecast Office
WSG
World Standard Group
WSI
whole sky imager
WSOC
water-soluble organic compound
WSR-88D
weather surveillance radar-88 Dopplers
WSRA
wide-swath radar altimeter
WTG
weak temperature gradient
WV
water vapor
WVM
water vapor mass
WVMR
water vapor mixing ratio
WVP
water vapor profiling
WVR
water vapor radiometer
WWLLN
World Wide Lightning Location Network
WWRP
World Weather Research Programme
WWW
World Weather Watch
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X-SAPR
X-Band Scanning ARM Precipitation Radar
XANES
X-ray Absorption Near Edge Structure spectroscopy
XBT
expendable bathythermograph
XDC
External Data Center (ARM)
XEDS
X-ray energy dispersive spectroscopy
XPIA
Experimental Measurement Campaign: Planetary boundary layer Instrumentation Assessment
XPS
X-ray photoelectron spectroscopy
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YES
Yankee Environmental Systems
YOPP
Year of Polar Prediction
YOTC
Year of Tropical Convection
YRD
Yangtze River Delta
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ZHD
zenith hydrostatic delay
ZPW
Zero Power Warming experiment
ZSS
Zvenigorod Scientific Station
ZTD
zenith total delay
ZWD
zenith wet delay