A21A-0045
OVOC Sources and Sinks over North America: New Constraints from Recent Aircraft Campaigns
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Xin Chen1, Dylan B Millet1, Hanwant B Singh2, Armin Wisthaler3,4, Tomas Mikoviny4 and Markus Müller3, (1)University of Minnesota Twin Cities, Minneapolis, MN, United States, (2)NASA Ames Research Center, Moffett Field, CA, United States, (3)University of Innsbruck, Innsbruck, Austria, (4)University of Oslo, Oslo, Norway
Abstract:
Aircraft campaigns (e.g. DISCOVER-AQ, SENEX, SEAC4RS, DC3, CalNex) conducted over North America in the past 5 years provide new constraints on the sources and sinks of oxygenated volatile organic compounds (OVOC). Over that same time period, analytical advances (e.g. PTR-TOF-MS and other CIMS techniques) have substantially widened the array of atmospheric OVOC that can be detected and quantified, and thus provide rich new information for testing present understanding. Here, we apply a nested version of the GEOS-Chem CTM run with a new and expanded chemical mechanism to interpret these data. We use model-measurement comparisons of mixing ratios and species-species correlations to test current budget estimates for key individual OVOCs, while also testing the model ability to capture the overall chemical tendencies across the ensemble of detected organic compounds.
