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Narrowing of the ITCZ in a warming climate: Physical mechanisms

Abstract:

The Intertropical Convergence Zone (ITCZ) narrows in response to global warming in both observations and climate models. However, a physical understanding of this narrowing is lacking. Here we show that the narrowing of the ITCZ in simulations of future climate is related to changes in the moist static energy (MSE) budget. MSE advection by the mean circulation and MSE divergence by transient eddies tend to narrow the ITCZ, while changes in net energy input to the atmosphere and the gross mois...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's Version

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Publisher copy:
10.1002/2016GL070396

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Subgroup:
Atmos Ocean & Planet Physics
Schneider, T More by this author
Publisher:
American Geophysical Union Publisher's website
Journal:
Geophysical Research Letters Journal website
Volume:
43
Issue:
21
Pages:
11,350-11,357
Publication date:
2016-11-09
Acceptance date:
2016-10-14
DOI:
ISSN:
0094-8276
Pubs id:
pubs:942647
URN:
uri:85be5944-9a9c-491c-9cd8-326aa96e53e9
UUID:
uuid:85be5944-9a9c-491c-9cd8-326aa96e53e9
Local pid:
pubs:942647

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