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Recent advances in understanding secondary organic aerosol : Implications for global climate forcing

Shrivastava, Manish; Cappa, Christopher D.; Fan, Jiwen; Goldstein, Allen H.; Guenther, Alex B.; Jimenez, Jose L.; Kuang, Chongai; Laskin, Alexander; Martin, Scot T. and Ng, Nga Lee, et al. (2017) In Reviews of Geophysics
Abstract

Anthropogenic emissions and land use changes have modified atmospheric aerosol concentrations and size distributions over time. Understanding preindustrial conditions and changes in organic aerosol due to anthropogenic activities is important because these features (1) influence estimates of aerosol radiative forcing and (2) can confound estimates of the historical response of climate to increases in greenhouse gases. Secondary organic aerosol (SOA), formed in the atmosphere by oxidation of organic gases, represents a major fraction of global submicron-sized atmospheric organic aerosol. Over the past decade, significant advances in understanding SOA properties and formation mechanisms have occurred through measurements, yet current... (More)

Anthropogenic emissions and land use changes have modified atmospheric aerosol concentrations and size distributions over time. Understanding preindustrial conditions and changes in organic aerosol due to anthropogenic activities is important because these features (1) influence estimates of aerosol radiative forcing and (2) can confound estimates of the historical response of climate to increases in greenhouse gases. Secondary organic aerosol (SOA), formed in the atmosphere by oxidation of organic gases, represents a major fraction of global submicron-sized atmospheric organic aerosol. Over the past decade, significant advances in understanding SOA properties and formation mechanisms have occurred through measurements, yet current climate models typically do not comprehensively include all important processes. This review summarizes some of the important developments during the past decade in understanding SOA formation. We highlight the importance of some processes that influence the growth of SOA particles to sizes relevant for clouds and radiative forcing, including formation of extremely low volatility organics in the gas phase, acid-catalyzed multiphase chemistry of isoprene epoxydiols, particle-phase oligomerization, and physical properties such as volatility and viscosity. Several SOA processes highlighted in this review are complex and interdependent and have nonlinear effects on the properties, formation, and evolution of SOA. Current global models neglect this complexity and nonlinearity and thus are less likely to accurately predict the climate forcing of SOA and project future climate sensitivity to greenhouse gases. Efforts are also needed to rank the most influential processes and nonlinear process-related interactions, so that these processes can be accurately represented in atmospheric chemistry-climate models.

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Secondary organic aerosol
in
Reviews of Geophysics
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American Geophysical Union
external identifiers
  • scopus:85020713245
  • wos:000405304200008
ISSN
8755-1209
DOI
10.1002/2016RG000540
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English
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yes
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d8f3bc80-8ca9-492c-8e7a-54ca37cf08c5
date added to LUP
2017-07-05 10:30:17
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2017-09-18 11:37:50
@article{d8f3bc80-8ca9-492c-8e7a-54ca37cf08c5,
  abstract     = {<p>Anthropogenic emissions and land use changes have modified atmospheric aerosol concentrations and size distributions over time. Understanding preindustrial conditions and changes in organic aerosol due to anthropogenic activities is important because these features (1) influence estimates of aerosol radiative forcing and (2) can confound estimates of the historical response of climate to increases in greenhouse gases. Secondary organic aerosol (SOA), formed in the atmosphere by oxidation of organic gases, represents a major fraction of global submicron-sized atmospheric organic aerosol. Over the past decade, significant advances in understanding SOA properties and formation mechanisms have occurred through measurements, yet current climate models typically do not comprehensively include all important processes. This review summarizes some of the important developments during the past decade in understanding SOA formation. We highlight the importance of some processes that influence the growth of SOA particles to sizes relevant for clouds and radiative forcing, including formation of extremely low volatility organics in the gas phase, acid-catalyzed multiphase chemistry of isoprene epoxydiols, particle-phase oligomerization, and physical properties such as volatility and viscosity. Several SOA processes highlighted in this review are complex and interdependent and have nonlinear effects on the properties, formation, and evolution of SOA. Current global models neglect this complexity and nonlinearity and thus are less likely to accurately predict the climate forcing of SOA and project future climate sensitivity to greenhouse gases. Efforts are also needed to rank the most influential processes and nonlinear process-related interactions, so that these processes can be accurately represented in atmospheric chemistry-climate models.</p>},
  author       = {Shrivastava, Manish and Cappa, Christopher D. and Fan, Jiwen and Goldstein, Allen H. and Guenther, Alex B. and Jimenez, Jose L. and Kuang, Chongai and Laskin, Alexander and Martin, Scot T. and Ng, Nga Lee and Petaja, Tuukka and Pierce, Jeffrey R. and Rasch, Philip J. and Roldin, Pontus and Seinfeld, John H. and Shilling, John and Smith, James N. and Thornton, Joel A. and Volkamer, Rainer and Wang, Jian and Worsnop, Douglas R. and Zaveri, Rahul A. and Zelenyuk, Alla and Zhang, Qi},
  issn         = {8755-1209},
  keyword      = {Secondary organic aerosol},
  language     = {eng},
  month        = {06},
  publisher    = {American Geophysical Union},
  series       = {Reviews of Geophysics},
  title        = {Recent advances in understanding secondary organic aerosol : Implications for global climate forcing},
  url          = {http://dx.doi.org/10.1002/2016RG000540},
  year         = {2017},
}