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Estimate of global atmospheric organic aerosol from oxidation of biogenic hydrocarbons
Author(s) -
Griffin Robert J.,
Cocker David R.,
Seinfeld John H.,
Dabdub Donald
Publication year - 1999
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 - 10.1029/1999gl900476
Subject(s) - aerosol , ozone , hydroxyl radical , hydrocarbon , nitrate , environmental chemistry , chemistry , atmosphere (unit) , atmospheric chemistry , photochemistry , environmental science , meteorology , radical , organic chemistry , physics
The results from a series of outdoor chamber experiments establishing the atmospheric aerosol‐forming potential of fourteen terpenoid hydrocarbons have been used to estimate the annual amount of secondary organic aerosol formed globally from compounds emitted by vegetation. Hydroxyl radical, ozone, and nitrate radical oxidation each contribute to aerosol formation in full‐photooxidation experiments; because oxidation by nitrate radical under ambient, remote conditions is likely to be negligible, parameters describing aerosol formation from hydroxyl radical and ozone reaction only are developed. Chamber results, temporally and spatially resolved, compound‐specific estimates of biogenic hydrocarbon emissions, and hydroxyl radical and ozone fields are combined to lead to an estimate for atmospheric secondary organic aerosol formed annually from biogenic precursors of 18.5 Tg, a number smaller than the previously published estimate of 30–270 Tg [ Andreae and Crutzen , 1997].