| 夏季东亚副热带经圈环流特征及其对长江流域降水的影响 |
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| 引用本文： | 李萍,缪启龙.夏季东亚副热带经圈环流特征及其对长江流域降水的影响[J].气象与减灾研究,2011,34(1):24-31. |
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| 作者姓名： | 李萍 缪启龙 |
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| 作者单位： | 南京信息工程大学,江苏,南京,210044 |
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| 基金项目： | 科技部公益性行业(气象)科研专项(编号:GYHY201006006) |
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| 摘 要： | 利用NCEP/NCAR 1979-2009年月平均风场资料,用质量流函数来定义东亚副热带的经圈环流指数,分析夏季(6-8月)东亚副热带经圈环流特征.结果表明,夏季东亚地区受反Hadlev环流影响,表现出与全球平均经圈环流不同的特征,用指数表征的东亚副热带经圈环流强度存在明显的年际和年代际变化.另外,利用相关性及水汽通量...
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| 关 键 词： | 东亚副热带 经圈环流 质量流函数 夏季降水 |
CHARACTERISTICS OF SUBTROPICAL MERIDIONAL CIRCULATION IN EAST ASIA AND THEIR INFLUENCES ON PRECIPITATION OVER YANGTZE RIVER BASIN |
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| Li Ping,Miao Qilong.CHARACTERISTICS OF SUBTROPICAL MERIDIONAL CIRCULATION IN EAST ASIA AND THEIR INFLUENCES ON PRECIPITATION OVER YANGTZE RIVER BASIN[J].Meteorology and Disaster Reduction Research,2011,34(1):24-31. |
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| Authors: | Li Ping Miao Qilong |
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| Institution: | Li Ping,Miao Qilong Nanjing University of Information Science & Technology,Nanjing 210044,China |
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| Abstract: | With the 1979—2009 NCAR/NCEP reanalyzed data,an East Asia subtropical meridional circulation index is defined by using mass stream function,and the characteristics of meridional circulation in summer are studied.The result shows that East Asia is affected by counter Hadley circulation in summer and has different features with mean meridional circulation,and the subtropical meridional circulations in East Asia present obvious interannual or interdecadal variations.In addtion,correlation and water vapor flux are analyzed,and it shows that there is a good relationship between the circulation index and precipitation over Yangtze River basin,the stronger（weaker） circulation index corresponds to the more（less） rainfall over Yangtze River basin,especially in July. |
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| Keywords: | Subtropical Meridional circulation Mass stream function Precipitation |
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