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Constraining the in...
Constraining the instantaneous aerosol influence on cloud albedo
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Gryspeerdt, Edward (author)
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Quaas, Johannes (author)
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Ferrachat, Sylvaine (author)
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Gettelman, Andrew (author)
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Ghan, Steven (author)
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Lohmann, Ulrike (author)
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Morrison, Hugh (author)
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Neubauer, David (author)
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- Partridge, Daniel G. (author)
- Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi,University of Exeter, United Kingdom
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Stier, Philip (author)
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Takemura, Toshihiko (author)
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Wang, Hailong (author)
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Wang, Minghuai (author)
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Zhang, Kai (author)
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(creator_code:org_t)
- 2017-04-26
- 2017
- English.
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In: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 114:19, s. 4899-4904
- Related links:
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https://www.pnas.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Much of the uncertainty in estimates of the anthropogenic forcing of climate change comes from uncertainties in the instantaneous effect of aerosols on cloud albedo, known as the Twomey effect or the radiative forcing from aerosol-cloud interactions (RFaci), a component of the total or effective radiative forcing. Because aerosols serving as cloud condensation nuclei can have a strong influence on the cloud droplet number concentration (Nd), previous studies have used the sensitivity of the Nd to aerosol properties as a constraint on the strength of the RFaci. However, recent studies have suggested that relationships between aerosol and cloud properties in the present-day climate may not be suitable for determining the sensitivity of the Nd to anthropogenic aerosol perturbations. Using an ensemble of global aerosol-climate models, this study demonstrates how joint histograms between Nd and aerosol properties can account for many of the issues raised by previous studies. It shows that if the anthropogenic contribution to the aerosol is known, the RFaci can be diagnosed to within 20% of its actual value. The accuracy of different aerosol proxies for diagnosing the RFaci is investigated, confirming that using the aerosol optical depth significantly underestimates the strength of the aerosol-cloud interactions in satellite data.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- aerosols
- clouds
- radiative forcing
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Gryspeerdt, Edwa ...
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Quaas, Johannes
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Ferrachat, Sylva ...
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Gettelman, Andre ...
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Ghan, Steven
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Lohmann, Ulrike
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show more...
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Morrison, Hugh
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Neubauer, David
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Partridge, Danie ...
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Stier, Philip
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Takemura, Toshih ...
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Wang, Hailong
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Wang, Minghuai
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Zhang, Kai
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Proceedings of t ...
- By the university
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Stockholm University