| 长江中下游夏季降水与热带对流的关系 |
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| 引用本文： | 李春,康建鹏,吴芃.长江中下游夏季降水与热带对流的关系[J].气象科学,2004,24(4):448-454. |
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| 作者姓名： | 李春 康建鹏 吴芃 |
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| 作者单位： | 1. 中国海洋大学海洋气象系,青岛,266003
2. 江苏省扬州市气象局,扬州,225009 |
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| 基金项目： | 国家自然科学基金 (编号 :4 0 170 193)，南京信息工程大学KLME开放课题 (编号 :Kjs0 30 5 )资助 |
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| 摘 要： | 本文利用1979～2001年中国160站月平均降水资料、NCEP／NCAR月平均再分析资料，包括OLR资料、500hPa高度场、海平面气压场及850hPa风场，借助相关分析、合成分析研究了长江中下游夏季降水与热带对流活动的关系。结果表明，热带对流活动与长江中下游夏季降水之间呈显著的正相关，即夏季热带对流活动强(弱)，长江中下游降水偏少(多)，易出现干旱(洪涝)。热带对流活动异常引起中、低纬度大气环流系统异常，中、低纬度大气环流系统异常向中、高纬度传播，引起中、高纬度大气环流系统异常，构成东亚地区大气环流异常，导致长江中下游地区夏季降水异常。
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| 关 键 词： | 热带对流 长江中下游降水 大气环流 遥相关 |
| 收稿时间： | 2003/8/14 0:00:00 |
| 修稿时间： | 2003年8月14日 |
LINKAGE OF SUMMER PRECIPITATIONS OVER YANGZE RIVER VALLEY AND TROPICAL CONVECTION |
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| Li Chun,Kang Jianpeng and Wu Peng.LINKAGE OF SUMMER PRECIPITATIONS OVER YANGZE RIVER VALLEY AND TROPICAL CONVECTION[J].Scientia Meteorologica Sinica,2004,24(4):448-454. |
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| Authors: | Li Chun Kang Jianpeng and Wu Peng |
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| Institution: | Li Chun 1 Kang Jianpeng 2 Wu Peng 1 |
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| Abstract: | Based on Chinese 160 stations monthly mean precipitations data and NCEP/NCAR monthly mean re-analysis data including OLR,500hPa geo-potential height,sea level pressure(SLP) and 850 hPa wind field data,the paper studies the linkage of summer precipitations over Changjiang River valley and tropical convection by means of correlation analysis and component analysis and so on. The results show that there is evidently positive correlation between tropical convection and summer precipitations over Changjiang River valley, that is, when summer tropical convection is stronger (weaker), summer precipitation over Changjiang River valley is less (richer), and then drought (flood) can easily appear. Tropical convective anomaly causes anomaly of mid-low latitude general circulation of atmosphere system , then its anomaly propagates from mid-low latitude to mid-high latitude, and then leads to anomaly of mid-high latitude general circulation of atmosphere system, and they constitute east Asian remote correlation pattern (EAP), thereby, result in summer precipitation anomaly over Changjiang River valley. |
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| Keywords: | Tropical convection Summer precipitation over Changjiang River valley General circulation of atmosphere Remote correlation pattern |
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