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Global secondary organic aerosol from isoprene oxidation
Author(s) -
Henze Daven K.,
Seinfeld John H.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl025976
Subject(s) - isoprene , aerosol , environmental chemistry , environmental science , total organic carbon , troposphere , chemistry , atmospheric sciences , organic chemistry , geology , copolymer , polymer
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.