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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, no6, [Note(s): L06805.1-L06805.5] (1/4 p.)

Langue / Language

Anglais

Editeur / Publisher

American Geophysical Union, Washington, DC, ETATS-UNIS  (1974) (Revue)

Mots-clés anglais / English Keywords

Dynamical climatology

;

Baroclinic instability

;

stability

;

Jet

;

subtropical zone

;

projects

;

simulation

;

climate modification

;

Climate modification

;

global change

;

global warming

;

atmospheric circulation

;

Hadley cell

;

expansion

;

Mots-clés français / French Keywords

Climatologie dynamique

;

Instabilité barocline

;

Stabilité

;

Jet

;

Zone subtropicale

;

Projet

;

Simulation

;

Modification climat

;

Modification climat

;

Changement planétaire

;

Réchauffement planétaire

;

Circulation atmosphérique

;

Cellule Hadley

;

Expansion

;

Mots-clés espagnols / Spanish Keywords

Climatología dinámica

;

Inestabilidad baroclínica

;

Estabilidad

;

Jet

;

Zona subtropical

;

Proyecto

;

Simulación

;

Modificación clima

;

Cambio planetario

;

Célula Hadley

;

Expansión

;

Localisation / Location

INIST-CNRS, Cote INIST : 16687, 35400014951090.0560

Nº notice refdoc (ud4) : 18724246



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