Global secondary organic aerosol from isoprene oxidation

Details Global secondary organic aerosol from isoprene oxidation Global secondary organic aerosol from isoprene oxidation

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3309812h&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 9, CiteID L09812

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98

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Troposphere: Composition And Chemistry, Geochemistry: Composition Of Aerosols And Dust Particles, Computational Geophysics: Modeling (4255)

Scientific paper

Inclusion of isoprene as a source of secondary organic aerosol (SOA) in a global model increases the global burden of SOA from all sources by more than a factor of two. The isoprene source substantially increases SOA concentrations in the free troposphere, because isoprene, and, more importantly, isoprene's oxidation products, have much greater concentrations at higher altitudes than other biogenic SOA precursors, highlighting the importance of semi-volatile organics for SOA formation. These results are robust with respect to increases in partitioning of non-isoprene oxidation products at higher altitudes and increased wet removal of isoprene oxidation products. This additional source of SOA enhances production of SOA from other parent hydrocarbons by 17%, and leads to an overall distribution of SOA that differs enough from previous predictions to warrant reevaluation of the radiative effects of organic carbon aerosol.

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