摘要
利用中尺度区域大气模式RAMS对青藏高原下垫面植被变化的气候效应进行了数值模拟试验,研究了植被变化对区域气候的可能影响。结果表明,青藏高原气候效应在对流层高层(300hPa)有很好的体现,高原植被的变化后所引起的加热和降温效应在地表和高空表现不一致,且在流场上表现出的气旋性差值(反气旋性差值)会加强对流层高层南亚高压(低层西南低涡系统),从而可能会影响长江流域的降水。
Using the mesoscale regional atmospheric model RAMS(The Regional Atmospheric Modeling System),the climatic effects of underlying surface vegetation changes of Tibetan Plateau were conducted the numerical simulation.The possible influence of vegetation variation on regional climate was studied.The results showed that the climatic effects of Tibetan Plateau were well represented in the upper troposphere(300 hPa).The heating effect and cooling effect caused by vegetation changes of Tibetan Plateau were inconsistent between land surface and upper air,and the cyclone(anticyclone) differences reflected in the flow field would enhance South Asia high in the higher troposphere(lower southwest vortex system),which might have an effect on the precipitation in Yangtze River basin.
基金
Supported by National Science and Technology Support Project(2007BAC29B04)
Major State Basic Research Development Program of China(2009CB421402)
关键词
青藏高原
RAMS
植被变化
Tibetan Plateau
RAMS
Vegetation variation
China
