| 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。 |
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| 基金项目:国家自然科学基金;国家气象局季风科研基金联合资助 |
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| THE 30-50 DAY OSCILLATION CHARACTERISTICS OF MONSOON CIRCULATION OVER EAST ASIA AND AUSTRALIA DURING THE WINTER OF 1982-1983 |
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Wang Jianhong, He Jinhai
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Nan jing Institute of Meteorology
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| Abstract: |
| 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. |
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