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Abrupt Seasonal Migration of the ITCZ into the Summer Hemisphere
- Article from:
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Journal of the Atmospheric Sciences
- Article date:
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June 1, 2008
- Author:
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;
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Copyright informationCopyright American Meteorological Society Jun 2008. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Although the maximum of solar radiation at the top of the atmosphere moves gradually from one hemisphere to the other as part of the seasonal cycle, the intertropical convergence zone (ITCZ) moves abruptly into the summer hemisphere. An axisymmetric circulation model is developed
to study this rapid transition. The model consists of an upper and lower layer of the Hadley circulation (HC), with the surface layer attached to a slab ocean and the lower layer connected to the upper layer by a constant lapse rate. The model is forced by solar heating, and the ITCZ is prescribed to coincide with the warmest sea surface temperature (SST). The collocation of tropical rainfall with warm SST ...
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