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DOI10.5194/acp-18-7669-2018
Strong impacts on aerosol indirect effects from historical oxidant changes
Karset, Inger Helene Hafsahl1; Berntsen, Terje Koren1,2; Storelvmo, Trude1; Alterskjaer, Kari2; Grini, Alf3; Olivie, Dirk3; Kirkevag, Alf3; Seland, Oyvind3; Iversen, Trond3; Schulz, Michael3
2018-06-01
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2018
卷号18期号:10页码:7669-7690
文章类型Article
语种英语
国家Norway
英文摘要

Uncertainties in effective radiative forcings through aerosol-cloud interactions (ERFaci, also called aerosol indirect effects) contribute strongly to the uncertainty in the total preindustrial-to-present-day anthropogenic forcing. Some forcing estimates of the total aerosol indirect effect are so negative that they even offset the greenhouse gas forcing. This study highlights the role of oxidants in modeling of preindustrial-to-present-day aerosol indirect effects. We argue that the aerosol precursor gases should be exposed to oxidants of its era to get a more correct representation of secondary aerosol formation. Our model simulations show that the total aerosol indirect effect changes from -1.32 to -1.07 W m(-2) when the precursor gases in the preindustrial simulation are exposed to preindustrial instead of present-day oxidants. This happens because of a brightening of the clouds in the preindustrial simulation, mainly due to large changes in the nitrate radical (NO3). The weaker oxidative power of the preindustrial atmosphere extends the lifetime of the precursor gases, enabling them to be transported higher up in the atmosphere and towards more remote areas where the susceptibility of the cloud albedo to aerosol changes is high. The oxidation changes also shift the importance of different chemical reactions and produce more condensate, thus increasing the size of the aerosols and making it easier for them to activate as cloud condensation nuclei.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000433963400005
WOS关键词COMMUNITY ATMOSPHERE MODEL ; EARTH SYSTEM MODEL ; INTERCOMPARISON PROJECT ACCMIP ; STRATIFORM CLOUD MICROPHYSICS ; HETEROGENEOUS ICE NUCLEATION ; CLIMATE MODEL ; PARTICLE FORMATION ; ORGANIC AEROSOL ; SULFURIC-ACID ; PREINDUSTRIAL TIMES
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/27312
专题地球科学
作者单位1.Univ Oslo, Dept Geosci, Sect Meteorol & Oceanog, Oslo, Norway;
2.CICERO Ctr Int Climate Res, Oslo, Norway;
3.Norwegian Meteorol Inst, Oslo, Norway
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Karset, Inger Helene Hafsahl,Berntsen, Terje Koren,Storelvmo, Trude,et al. Strong impacts on aerosol indirect effects from historical oxidant changes[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(10):7669-7690.
APA Karset, Inger Helene Hafsahl.,Berntsen, Terje Koren.,Storelvmo, Trude.,Alterskjaer, Kari.,Grini, Alf.,...&Schulz, Michael.(2018).Strong impacts on aerosol indirect effects from historical oxidant changes.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(10),7669-7690.
MLA Karset, Inger Helene Hafsahl,et al."Strong impacts on aerosol indirect effects from historical oxidant changes".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.10(2018):7669-7690.
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