Expansion of the Hadley cell under global warming

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.

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Copyright 2007 American Geophysical Union.
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Author Lu, Jian
Vecchi, Gabriel
Reichler, Thomas
Publisher UCAR/NCAR - Library
Publication Date 2007-03-24T00:00:00
Digital Object Identifier (DOI) Not Assigned
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:27:01.687162
Metadata Record Identifier edu.ucar.opensky::articles:6999
Metadata Language eng; USA
Suggested Citation Lu, Jian, Vecchi, Gabriel, Reichler, Thomas. (2007). Expansion of the Hadley cell under global warming. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d72n52j6. Accessed 19 March 2025.

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