Isoprene forms secondary organic aerosol through cloud processing: Model simulations

Ho Jin Lim; Annmarie G. Carlton; Barbara J. Turpin

doi:10.1021/es048039h

Isoprene forms secondary organic aerosol through cloud processing: Model simulations

Ho Jin Lim, Annmarie G. Carlton, Barbara J. Turpin

Department of Environmental Engineering

Rutgers - The State University of New Jersey, New Brunswick

Research output: Contribution to journal › Article › peer-review

346 Scopus citations

Abstract

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 incloud 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.

Original language	English
Pages (from-to)	4441-4446
Number of pages	6
Journal	Environmental Science and Technology
Volume	39
Issue number	12
DOIs	https://doi.org/10.1021/es048039h
State	Published - 15 Jun 2005

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abstract = "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 incloud 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.",

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AB - 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 incloud 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.

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Isoprene forms secondary organic aerosol through cloud processing: Model simulations

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