Isoprene forms secondary organic aerosol through cloud processing: Model simulations

被引：351

作者：

Lim, HJ ^{[1
]}

Carlton, AG ^{[1
]}

Turpin, BJ ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2005年 / 39卷 / 12期

关键词：

D O I：

10.1021/es048039h

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Isoprene accounts for more than half of non-methane volatile organics globally. Despite extensive experimentation, homogeneous formation of secondary organic aerosol (SOA) from isoprene remains unproven. Herein, an in-cloud process is identified in which isoprene produces SOA. Interstitial oxidation of isoprene produces water-soluble aldehydes that react in cloud droplets to form organic acids. Upon cloud evaporation new organic particulate matter is formed. Cloud processing of isoprene contributes at least 1.6 Tg yr(-1) to a global biogenic SOA production of 8-40 Tg yr(-1). We conclude that cloud processing of isoprene is an important contributor to SOA production, altering the global distribution of hygroscopic organic aerosol and cloud condensation nuclei.

引用

页码：4441 / 4446

页数：6

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