摘要
本文应用1982年11月16日—1983年3月15日欧洲中期预报中心的格点资料及向外长波辐射资料(OLR),考察了冬季亚澳季风区季风环流的演变规律。分析了冬季亚澳季风盛期的月平均流场;对澳大利亚季风活跃与中断的几个不同时期流场进行了对比。结果表明,冬季亚澳地区季风环流的演变具有准40天低频振荡特征。主要表现是局地哈得莱环流的准40天强弱变化,澳大利亚季风槽的东西进退,以及北半球副热带高压的东西摆动。
In this paper, the evolution features of monsoon circulation over East Asia and Australia are investigated using ECMWF gridpoint data and OLR for Nov. 16, 1982-March 15, 1983. An analysis is carried out of monthly mean wind fields during prevailling monsoon period and a comparison of flows is also made between monsoon active and break phases over Australia. The results show that the evolution of the monsoon circulation in winter exhibits quasi 30-50 day oscillations. The major features are the variations in intensity of local Hadley circulation cell as well as an east-west movement of the Australian monsoon trough and of the Pacific High over Northern Hemisphere.
出处
《热带气象》
CSCD
1991年第2期104-112,共9页
基金
国家自然科学基金
国家气象局季风科研基金联合资助
