青藏高原冬季雪盖增大对夏季东亚大气环流影响的数值试验

利用二维非线性能量（Ｅ－ε）闭合的边界层数值模式，研究了中纬度地区海岸日间局地海风环流的特征，并对不同海风特性条件下的ＴＩＢＬ高度廓线用幂指数关系进行了数学拟合。对大量的数值试验结果分析表明，ＴＩＢＬ廓线幂指数（α）的取值与海风特性有关，其大小在０．４－１．１之间，α＝０．５只在海风充分发展时的陆上适用，文中还给出了不同海风发展程度（阶段）下的α取值。

NUMERICAL SIMULATION OF THE IMPACT OF WINTER SNOW COVER AT QINGHAI XIZANG PLATEAU ON SUMMER GENERAL CIRCULATION OVER EAST ASIA

A 9-layer spectral general circulation model.i.e.,Australian L9R15 AGCM,was used to simulate the impacts of increasing winter snow cover at Qinghai-Xizang Plateau on summer general circulation over East Asia and its seasonal anormality.Preliminary results show that if winter snow cover on Qinghai-Xizang Plateau is larger than normal,the Subtropical high of western Pacific will be weakened and move eastward,Southern Asia high will also be weakened and move southward,meanwhile East Asia monsoon will be weakened and its seasonal variation is anormal.That means the beginning of seasonal northward moving of Subtropical high in western Pacific Ocean is earlier,the maximum latitude of northward moving is lower,and the maintenance duration of East Asia monsoon is shorter.These are almost the same as results in other papers.