Southern Hemisphere jet latitude biases in CMIP5 models linked to shortwave cloud forcing
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Published version
Supporting information
Author(s)
Ceppi, Paulo
Hwang, Yen-Ting
Frierson, Dargan MW
Hartmann, Dennis L
Type
Journal Article
Abstract
[1] Substantial biases in shortwave cloud forcing (SWCF) of up to ±30 W m−2are found in the midlatitudes of the Southern Hemisphere in the historical simulations of 34 CMIP5 coupled general circulation models. The SWCF biases are shown to induce surface temperature anomalies localized in the midlatitudes, and are significantly correlated with the mean latitude of the eddy‐driven jet, with a negative SWCF bias corresponding to an equatorward jet latitude bias. Aquaplanet model experiments are performed to demonstrate that the jet latitude biases are primarily induced by the midlatitude SWCF anomalies, such that the jet moves toward (away from) regions of enhanced (reduced) temperature gradients. The results underline the necessity of accurately representing cloud radiative forcings in state‐of‐the‐art coupled models.
Date Issued
2012-10-05
Date Acceptance
2012-09-04
Citation
Geophysical Research Letters, 2012, 39, pp.1-5
ISSN
0094-8276
Publisher
American Geophysical Union
Start Page
1
End Page
5
Journal / Book Title
Geophysical Research Letters
Volume
39
Copyright Statement
©2012. American Geophysical Union. All Rights Reserved.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000309606600004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Geosciences, Multidisciplinary
Geology
CLIMATE MODELS
PERTURBATIONS
SYSTEM
OZONE
Publication Status
Published
Article Number
ARTN L19708
Date Publish Online
2012-10-05