Imperial College London
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DrEdwardGryspeerdt

Faculty of Natural Sciences, The Grantham Institute for Climate Change

Royal Society University Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 7900e.gryspeerdt Website

 
 
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Location

 

708Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Gryspeerdt:2017:10.1073/pnas.1617765114,
author = {Gryspeerdt, E and Quaas, J and Ferrachat, S and Gettelman, A and Ghan, S and Lohmann, U and Morrison, H and Neubauer, D and Partridge, DG and Stier, P and Takemura, T and Wang, H and Wang, M and Zhang, K},
doi = {10.1073/pnas.1617765114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
pages = {4899--4904},
title = {Constraining the instantaneous aerosol influence on cloud albedo},
url = {http://dx.doi.org/10.1073/pnas.1617765114},
volume = {114},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - Gryspeerdt,E
AU  - Quaas,J
AU  - Ferrachat,S
AU  - Gettelman,A
AU  - Ghan,S
AU  - Lohmann,U
AU  - Morrison,H
AU  - Neubauer,D
AU  - Partridge,DG
AU  - Stier,P
AU  - Takemura,T
AU  - Wang,H
AU  - Wang,M
AU  - Zhang,K
DO  - 10.1073/pnas.1617765114
EP  - 4904
PY  - 2017///
SN  - 1091-6490
SP  - 4899
TI  - Constraining the instantaneous aerosol influence on cloud albedo
T2  - Proceedings of the National Academy of Sciences of the United States of America
UR  - http://dx.doi.org/10.1073/pnas.1617765114
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000400818400033&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/48925
VL  - 114
ER  -
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