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Minimal models of the tropical climate: theoretical aspects and implication for the future climate change

Abstract : Why does the surface temperature in thee Tropics exhibit a maximum around 30°C, what are the mechanisms that control the stability of the tropical climate, and what are the specificities of climate change in that region of the Earth? A simple two-column model is used to confirm the high sensitivity of the tropical climate to a change of relative surfaces covered by moist and dry zones, particularly in the context of a warming related to the increase of greenhouse gas concentration. The influence of surface winds is shown to be significant. Two-column moist/dry systems exhibit a bimodal size distribution in the observations, with a synoptic mode and a large-scale one. This bimodality can be reproduced with a simple model, in which the surface dynamics select the spatial scales. Finally, the limits of idealized modelling of the trade-wind boundary layer are analyzed.
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https://tel.archives-ouvertes.fr/tel-00007385
Contributor : Bellon Gilles <>
Submitted on : Monday, November 29, 2004 - 6:08:58 PM
Last modification on : Tuesday, December 22, 2020 - 11:52:02 AM
Long-term archiving on: : Friday, April 2, 2010 - 9:14:21 PM

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  • HAL Id : tel-00007385, version 1

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Gilles Bellon. Minimal models of the tropical climate: theoretical aspects and implication for the future climate change. domain_other. Université Pierre et Marie Curie - Paris VI, 2004. English. ⟨tel-00007385⟩

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