Spatial Distributions and Source Characterization of Trace Organic Gases during SEAC4RS and Comparison to DC3

Wednesday, 17 December 2014
Nicola J Blake1, Barbara Barletta1, Isobel Jane Simpson1, Jason Schroeder1, Stacey Hughes1, Josette Elizabeth Marrero1, Simone Meinardi1, Donald Ray Blake1, Eric C Apel2, Rebecca S Hornbrook2 and Louisa K Emmons2, (1)University of California Irvine, Irvine, CA, United States, (2)NCAR, Boulder, CO, United States
Trace organic compounds are emitted into the atmosphere by a wide variety of anthropogenic and natural sources, where they can impact atmospheric chemistry and air quality. A broad suite of volatile organic compounds (VOCs) were measured on the NASA DC-8 by the UC-Irvine whole air sampler (WAS) during the Studies of Emissions and Atmospheric Composition, Clouds, and Climate Coupling by Regional Surveys (SEAC4RS) and Deep Convective Clouds and Chemistry Project (DC3) field campaigns. The NCAR Trace Organic Gas Analyzer (TOGA) also measured VOCs on board the NSF GV during DC-3. Numerous sources, as identified by their characteristic emission ratios were encountered during the two campaigns, including oil and gas wells in Colorado, Texas, and Oklahoma, urban, biomass burning, and biogenic emissions. The results will be compared to model simulations from the Community Atmosphere Model with Chemistry (CAM-chem).