Estimate of global atmospheric organic aerosol from oxidation of biogenic hydrocarbons
Estimate of global atmospheric organic aerosol from oxidation of biogenic hydrocarbons
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DOI：
10.1029/1999gl900476
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发表时间：
1999-09-01
影响因子：
5.2
通讯作者：
Dabdub, D
中科院分区：
文献类型：
--
作者：
Griffin, RJ;Cocker, DR;Dabdub, D
确定14种萜类碳氢化合物的大气气溶胶形成潜力的一系列室外室内实验的结果已被用来估计全球每年由植被排放的化合物形成的二次有机气溶胶的数量。在完全光氧化实验中，羟基自由基、臭氧和硝酸根的氧化都对气溶胶的形成有贡献；由于硝酸根在常温、偏远条件下的氧化很可能可以忽略不计，因此开发了描述羟基自由基和臭氧反应形成气溶胶的参数。室内结果、时间和空间分辨的、特定于化合物的生物成因碳氢化合物排放估计以及羟基自由基和臭氧层场结合在一起，得到了每年由生物成因前体形成的大气二次有机气溶胶的估计值18.5Tg，这个数字小于先前公布的30-270 Tg的估计值[Andreae和Crutzen，1997]。
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].