Titre du document / Document title
Expansion of the Hadley cell under global warming
Auteur(s) / Author(s)
JIAN LU (1 2) ;
VECCHI Gabriel A. (3) ;
REICHLER Thomas (4) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Climate and Global Dynamics Division, National Center for Atmospheric Research, University Corporation for Atmospheric Research, Boulder, Colorado, ETATS-UNIS
(2) University Corporation for Atmospheric Research Visiting Scientist Program, Geophysical Fluid Dynamics Laboratory, NOAA, Princeton University, Princeton, New Jersey, ETATS-UNIS
(3) Geophysical Fluid Dynamics Laboratory, National Oceanic and Atmospheric Administration, Princeton University, Princeton, New Jersey, ETATS-UNIS
(4) Department of Meteorology, University of Utah, Salt Lake City, Utah, ETATS-UNIS
Résumé / Abstract
[1] A consistent weakening and poleward expansion of the Hadley circulation is diagnosed in the climate change simulations of the IPCC AR4 project. Associated with this widening is a poleward expansion of the subtropical dry zone. Simple scaling analysis supports the notion that the poleward extent of the Hadley cell is set by the location where the thermally driven jet first becomes baroclinically unstable. The expansion of the Hadley cell is caused by an increase in the subtropical static stability, which pushes poleward the baroclinic instability zone and hence the outer boundary of the Hadley cell.
Revue / Journal Title
Geophysical research letters
ISSN
0094-8276
CODEN GPRLAJ
Source / Source
2007, vol. 34, n
o6, [Note(s): L06805.1-L06805.5] (1/4 p.)
Langue / Language
Anglais
Editeur / Publisher
American Geophysical Union, Washington, DC, ETATS-UNIS
(1974)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 16687, 35400014951090.0560
Nº notice refdoc (ud4) : 18724246
