青藏高原夏季下垫面植被变化气候效应的数值模拟

Numerical Simulation of Tibetan Plateau Underling Surface Vegetation Variation Climate Effect in Summer

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。

RAMS （The Regional Atmospheric Modeling System） has been used to study the climate influence of Tibetan Plateau vegetation variation. The results showed that the climate effect of Tibetan Plateau is good at 300 hPa, the heating effect and cooling effect caused by vege- tation changes in Tibetan Plateau are inconsistent between land surface and upper air, and the cyclone（anticyclones） differences will increase troposphere high pressure in south Asia separately（Southwest Vortex）, this phenomenon may effect on the precipitation in Yangtze River basin.