PASS3 measurements from two DOE ARM aerosol observing systems (AOS): SGP and the recent MAOS deployments for PACE and TCAP

 
Poster PDF

Authors

Allison C Aiken — Los Alamos National Laboratory
Manvendra K. Dubey — Los Alamos National Laboratory
Shang Liu — Los Alamos National Laboratory

Category

Aerosol Properties

Description

Aerosol absorption and scattering are reported from the three-wavelength photoacoustic soot spectrometers (PASS3, Droplet Measurement Technologies) located in two DOE ARM aerosol observing systems (AOS) from within the last year. Stationary measurements have been made at the Southern Great Plains (SGP) Central Facility in Ponca City, Oklahoma, since January 2013 at 405 nm, 532 nm, and 781 nm with an upgraded instrument. Improved lasers with increased laser powers and an external acoustic filter have been deployed to increase instrumental signal-to-noise ratios over those previously made from 2009 to 2012. Results from the PASS3 within the two recent MAOS deployments will also be shown. The Pajarito Aerosol Coupling to Ecosystems (PACE) campaign occurred in the winter of 2012 at Los Alamos National Laboratory in New Mexico, and the Two-Column Aerosol Project has been a two-phase project occurring during two different seasons in Cape Cod, Massachusetts, during summer 2012 and winter 2013. Absorption and scattering measurements are compared with collocated measurements made with the particle soot absorption photometer (PSAP, Radiance Research) at 467 nm, 530 nm, and 660 nm, and a cavity attenuated phase shift spectrometer (CAPS, Aerodyne, Inc.) that measures particulate extinction (absorption + scattering) at 450 nm.