| SEASONAL VARIATIONS OF CONVECTIVE ACTIVITIES OVER THE SOUTH CHINA SEA AND ITS NEIGHBORHOOD AND THEIR COMPARATIVE ANALYSES IN THE STRONG AND WEAK CONVECTION YEARS |
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| 作者姓名： | 张卫青 钱永甫 |
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| 作者单位： | Department of Atmospheric Sciences Nanjing University，Nanjing 210093，Department of Atmospheric Sciences，Nanjing University，Nanjing 210093 |
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| 基金项目： | Supported jointly by the Key Program of National Natural Science Foundation of China“Analyses and Mechanism Study of the Regional Climatic Change in China”under Grant No.49735170，the National Climbing Program“The South China Sea Monsoon Experiment |
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| 摘 要： | The seasonal variations of convective activities over the South China Sea(SCS)and itsneighborhood.as well as the similarities and differences of convection in the different key regionsduring the strong and weak convection years are analyzed by using the pentad data of TBB from1980 to 1993.The results show that in winter and summer the seasonal variations of the convectiveactivities are synchronous over the SCS and its neighborhood,the anomalous convection amplitudesare obviously different in different regions.The significant extents of convective activities havesomewhat seasonal differences in the strong and weak convection years.In the strong convectionyears,it is in winter,spring and autumn that the convection anomaly is more evident than that inthe normal years,however,after the summer monsoon onset the convection is sustained.stableand similar to that in the normal years.In the weak convection years.the convection weakensgreatly in each season.but the primary weakening occurs in spring.summer and autumn.Nomatter in the strong or the weak convection years.the convective activities are somewhat ofdifference in the Bay of Bengal.the Indochina Peninsula.the SCS and the Philippines.In addition.the convective activities are also different over the south and the north parts of the SCS.theconvection variation in the strong year is similar to that in the weak year over the north part of theSCS.but over the south part there are great differences.
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SEASONAL VARIATIONS OF CONVECTIVE ACTIVITIES OVER THE SOUTH CHINA SEA AND ITS NEIGHBORHOOD AND THEIR COMPARATIVE ANALYSES IN THE STRONG AND WEAK CONVECTION YEARS |
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| ZHANG Weiqing QIAN Yongfu.SEASONAL VARIATIONS OF CONVECTIVE ACTIVITIES OVER THE SOUTH CHINA SEA AND ITS NEIGHBORHOOD AND THEIR COMPARATIVE ANALYSES IN THE STRONG AND WEAK CONVECTION YEARS[J].Acta Meteorologica Sinica,2001(2). |
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| Authors: | ZHANG Weiqing QIAN Yongfu |
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| Institution: | ZHANG Weiqing QIAN Yongfu Department of Atmospheric Sciences,Nanjing University,Nanjing 210093 |
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| Abstract: | The seasonal variations of convective activities over the South China Sea(SCS)and its neighborhood.as well as the similarities and differences of convection in the different key regions during the strong and weak convection years are analyzed by using the pentad data of TBB from 1980 to 1993.The results show that in winter and summer the seasonal variations of the convective activities are synchronous over the SCS and its neighborhood,the anomalous convection amplitudes are obviously different in different regions.The significant extents of convective activities have somewhat seasonal differences in the strong and weak convection years.In the strong convection years,it is in winter,spring and autumn that the convection anomaly is more evident than that in the normal years,however,after the summer monsoon onset the convection is sustained.stable and similar to that in the normal years.In the weak convection years.the convection weakens greatly in each season.but the primary weakening occurs in spring.summer and autumn.No matter in the strong or the weak convection years.the convective activities are somewhat of difference in the Bay of Bengal.the Indochina Peninsula.the SCS and the Philippines.In addition. the convective activities are also different over the south and the north parts of the SCS.the convection variation in the strong year is similar to that in the weak year over the north part of the SCS.but over the south part there are great differences. |
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| Keywords: | convective activities seasonal variations South China Sea(SCS) comparative analysis Empirical Orthognal Function(EOF) |
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