摘要
利用大气环流九层谱模式，即澳大利亚Ｌ９Ｒ１５ＡＧＣＭ，进行了青藏高原雪盖增大对夏季东亚大气环流及其季节变化影响的数值试验。试验结果表明，青藏高原冬季多雪，则导致西太平洋副高减弱东撤，南亚高压减弱南移，东亚季风减弱及季节变化异常。它还使西太平洋副高季节性北移稍提前，减低了北移所达的纬度，以及缩短了东亚夏季流型的持续时间。这些大多与过去的观测事实基本一致。
9layer spectral general circulation model.i.e.,Australian L9R15 AGCM,was used to simulate the impacts of increasing winter snow cover at QinghaiXizang Plateau on summer general circulation over East Asia and its seasonal anormality.Preliminary results show that if winter snow cover on QinghaiXizang 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.
出处
《热带气象学报》
CSCD
北大核心
1998年第1期70-77,共8页
Journal of Tropical Meteorology
基金
青藏高原地气系统物理过程观测和理论研究项目
关键词
青藏高原
雪盖
季风
西太平洋
数值试验
Snow cover at QinghaiXizang Plateau EastAsia monsoon Subtropical high of Western Pacific ocean Numerical simulation
