La dynamique du temps et du climat en Amérique Centrale

Abstract : The Central American isthmus is characterised by a lowering of the relief which supports the aerological communication between the Atlantic and the Pacific. Because of their power and drain exerted by the relief, the Moving Polar Highs (MPHs) penetrate deeply in the tropical zone. The displacement of the MPHs and their progressive deceleration in direction of the Tropics, the meeting of the continents and their relieves and the effects on the mass flow form Anticyclonics Agglutinations. The MPHs get agglutinated and the Lines of Pulsation become gradually the trade winds and/or monsoon circulation. Tropical flows of the two weather hemispheres meet along the Meteorological Equator. The Central American isthmus constitutes a single climatic crossroads in the world. The study of the disturbances gives the key of dynamic analysis of weather and climate in Central America. Recent climatic evolution shows a modification of the style of general circulation since the Seventies.
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Submitted on : Tuesday, November 30, 2004 - 4:36:58 PM
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  • HAL Id : tel-00007550, version 1

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Emmanuel Barbier. La dynamique du temps et du climat en Amérique Centrale. Géographie. Université Jean Moulin - Lyon III, 2004. Français. ⟨tel-00007550⟩

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