First Look at the Extended Aerosol Size Distribution Measured from the New SGP AOS

 

Authors

Chongai Kuang — Brookhaven National Laboratory
Robert Lesley Bullard — Brookhaven National Laboratory
Janek Uin — Brookhaven National Laboratory
Scott Smith — Brookhaven National Laboratory
Stephen R. Springston — Brookhaven National Laboratory

Category

ARM infrastructure

Description

The Atmospheric Radiation Measurement (ARM) Facility of DOE has deployed a new Aerosol Observing System (AOS7) at the Southern Great Plains Climate Research Facility in Lamont, OK. Deployed in November, 2016, the AOS7 features aerosol instruments that extend aerosol size distribution measurements down to 3 nanometers and up to 20 microns. Through a combined deployment of a Nano-SMPS (3-50 nanometers), SMPS (10-500 nanometers), UHSAS (50-1000 nanometers), and APS (0.5-20 microns), long-term measurements of the extended aerosol size distribution at a rural agricultural U.S. site will now be available to the scientific community. In particular, these new measurement capabilities, in combination with co-deployed measurements of trace gases such as sulfur dioxide, will enable studies of new particle formation and growth of ultrafine aerosols to climate–relevant sizes. Based on initial measurements made so far, presented results include examples of the extended aerosol size distribution merged from various instruments, aerosol number concentration closure analyses, and examples of new particle formation and growth.