385 NO3-initiated oxidation of plant emissions as a source of secondary organic aerosol: speciated BVOC yield parameterization and policy implications

Monday, 7 January 2013
Exhibit Hall 3 (Austin Convention Center)
Juliane L. Fry, Reed College, Portland, OR; and C. Koski

Handout (5.4 MB)

NO3 oxidation of some biogenic volatile organic compounds (BVOCs) has been shown to produce large mass yields of secondary organic aerosol (SOA). We have conducted atmospheric simulation chamber experiments at the NCAR Community Lab investigating SOA growth rates and mass yields from individual hydrocarbons representative of the ambient mix observed in a pine forest. We find great diversity in SOA growth from NO3 oxidation among pine-emitted monoterpenes and sesquiterpenes. This diversity in climate-cooling aerosol production from different BVOCs means that the types of trees planted near NOx sources will affect regional climate. Here, we will present a combination of chamber and model results situated in the current context of environmental policy in the United States to guide future thinking on the role of NO3–initiated biogenic SOA. The research considers consequences for regional climate and the implications for current efforts at the national and subnational level to address climate change via regulation and planning.
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