| 9414号热带气旋(DOUG)非对称结构和对降水影响的分析 |
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| 引用本文： | 丁金才,姚祖庆,唐新章.9414号热带气旋(DOUG)非对称结构和对降水影响的分析[J].气象学报,1997,55(3):379-384. |
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| 作者姓名： | 丁金才 姚祖庆 唐新章 |
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| 作者单位： | 上海中心气象台，上海市气象局 |
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| 摘 要： | ＤＯＵＧ热带气旋在靠近华东沿海大陆北上过程中，气旋西侧的降水强度显著减弱，主要是ＤＯＵＧ气旋的完全非对称结构造成的。本文从大尺度天气系统配置、卫星云图和中尺度数值模式计算结果分析了ＤＯＵＧ气旋内区和外区非对称结构的成因和演变。外区的非对称结构主要由环境场的大尺度天气系统的东高西低气压场配置造成的。气旋近中心中－β尺度的辐散下沉系统的发展是造成内区非对称结构的主要原因。二者的形成是相互独立的。但内区非对称结构的发展会促使外区非对称结构的加强。前者向后者逼近并结合造成了ＤＯＵＧ的完全非对称结构
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| 关 键 词： | 热带气旋，非对称结构，大尺度系统配置，中－β辐散下沉系统 |
| 收稿时间： | 1995/8/16 0:00:00 |
| 修稿时间： | 1995/12/1 0:00:00 |
THE ANALYSIS OF THE ASYMMETRIC STRUCTURE OF TROPICAL CYCLONE DOUG AND ITS INFLU-ENCE ON PRECIPITATION |
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| Ding Jincai,Yao Zuqing and Tang Xinzhang.THE ANALYSIS OF THE ASYMMETRIC STRUCTURE OF TROPICAL CYCLONE DOUG AND ITS INFLU-ENCE ON PRECIPITATION[J].Acta Meteorologica Sinica,1997,55(3):379-384. |
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| Authors: | Ding Jincai Yao Zuqing and Tang Xinzhang |
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| Institution: | Shanghai Meteorological Center, Shanghai, 200030;Shanghai Meteorological Center, Shanghai, 200030;Shanghai Meteorological Bureau, Shanghai, 200030 |
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| Abstract: | Long series of daily weather data are frequently needed to evaluate diachronic climatic impact on water resources,the effects of watershed changes on hydrology and to use in a variety of weather and general circulation models.A computer generation model called WGEN that was developed in the United States of America,was modified in this study and applied to Nigerian weather data spanning the period between 1969 to 1988 and covering 17 sites located in the different climatic zones in Nigeria.The model generated the monthly mean maximum and minimum temperatures,solar radiation,total rainfall,and number of wet and dry days with high accuracy,95% of the times.The Mann-Whitney U-test revealed that the number of months per year for which observed and generated weather variables were significant,was less than 4 in majority of the sites. |
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| Keywords: | weather generator model simulation |
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