| 冬季风异常年份的环流特征及其与华南前汛期降水的关系 |
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| 引用本文： | 徐淑爱.冬季风异常年份的环流特征及其与华南前汛期降水的关系[J].热带气象学报,1988(3):263-271. |
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| 作者姓名： | 徐淑爱 |
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| 作者单位： | 中山大学大气科学系 |
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| 摘 要： | 本文分析了1963—1982年资料,研究了冬季风异常年份的环流特征及其与华南初夏降水的关系。结果表明:冬季风强年,500百帕西太平洋副高偏弱,亚洲西风环流弱,东亚槽南伸,200百帕115°E西风急流强而偏北。冬季风弱年的环流特征与此相反。强冬季风年后期环流演变特点,中高纬度环流逐渐向夏季型过渡,而副热带环流则变化强烈。弱冬季风年后期中高纬度环流在2月下旬至3月上旬有一个反复的过程,副热带环流则是逐步增强北上的。强冬季风年初夏500百帕西太平洋副高较正常年偏强,位置偏北,西脊点偏东,100百帕南亚高压偏西,华南及珠江三角洲前汛期降水偏少。弱冬季风年初夏环流特点与此相反,华南及珠江三角洲前汛期降水偏多。
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| 收稿时间： | 8/1/1987 12:00:00 AM |
| 修稿时间： | 1987/12/15 0:00:00 |
CIRCULATION FEATURES OF THE ABNORMAL WINTER MONSOON AND THEIR RELATION WITH THE EARLY SUMMER RAINFALL OVER SOUTH CHINA |
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| Xu Shuai.CIRCULATION FEATURES OF THE ABNORMAL WINTER MONSOON AND THEIR RELATION WITH THE EARLY SUMMER RAINFALL OVER SOUTH CHINA[J].Journal of Tropical Meteorology,1988(3):263-271. |
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| Authors: | Xu Shuai |
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| Institution: | Department of Atmospheric Sciences, Zhongshan University |
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| Abstract: | The data set of 1963-1982 was used to analyse the mean circulation for winters with abnormal monsoon in relation to early summer rainfall in South China, indicating that strong monsoon years see weaker 500 hPa subtropical high over the West Pacific and westerlies throughout Asia,more southward East Asia Trough, stronger and more northward 200 hPa westerly jet across 115°E. In the years of weak monsoon, the features are almost opposite.In the late season, circulation systems gradually evolve into their summer type in mid-and-highlatitudes with great changes in the subtropical high. In contrast, the systems of the same latitudes repeat themselves in their transition and the high goes north with slow increase in intensity, in years of weak monsoon.In strong monsoon years, early summer sees stronger and more northward 500 hPa subtropical high over the West Pacific, far-westward extended 100 hPa South Asia High and below-mean rainfall for South China.In weak monsoon years, early summer sees opposite features from the strong monsoon cases. |
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