| 夏季青藏高原大气热源与西南地区东部旱涝的关系 |
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| 引用本文： | 李永华,卢楚翰,徐海明,等.夏季青藏高原大气热源与西南地区东部旱涝的关系[J].大气科学,2011,35(3):422-434. |
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| 作者姓名： | 李永华 卢楚翰 徐海明 等 |
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| 作者单位： | 1.重庆市气候中心, 重庆, 401147; 南京信息工程大学气象灾害省部共建教育部重点实验室, 南京, 210044 |
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| 基金项目： | 国家自然科学基金资助项目40975058， 重庆市自然科学基金计划重点项目CSTC2008BA0022， 公益性行业 (气象) 科研专项GYHY201006054 |
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| 摘 要： | 利用1959～2006年西南地区东部20个测站逐日降水量资料和NCEP/NCAR再分析月平均资料,分析了夏季青藏高原大气热源特征,指出了影响西南地区东部夏季旱涝的热源关键区域,并就关键区大气热源对该区域夏季旱涝的影响进行了诊断,得出了以下主要结论:西南地区东部夏季降水与高原主体东南部的热源变化关系密切,当该区域(该区域...
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| 关 键 词： | 西南地区东部 夏季旱涝 高原热源 影响 |
Contemporaneous Relationships between Summer Atmospheric Heat Source over the Tibetan Plateau and Drought/Flood in Eastern Southwest China |
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| Li Yonghu,Lu Chuhan,Xu Haiming and et al.Contemporaneous Relationships between Summer Atmospheric Heat Source over the Tibetan Plateau and Drought/Flood in Eastern Southwest China[J].Chinese Journal of Atmospheric Sciences,2011,35(3):422-434. |
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| Authors: | Li Yonghu Lu Chuhan Xu Haiming and |
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| Institution: | 1.Chongqing Climate Center, Chongqing, 401147; Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 2100442.Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044 |
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| Abstract: | Based on the NCEP/NCAR reanalysis monthly data and daily precipitation data at 20 stations in eastern Southwest China from 1959 to 2006, the features of atmospheric heat source over the Tibetan Plateau and the key area associated with the drought/flood in summer over eastern Southwest China have been analyzed. Results show that there is a close relationship between the flood/drought over eastern Southwest China and the intensity of the atmospheric heat source over southeastern Tibetan Plateau (key area), i.e., the rainfall is more than normal while the heat source is stronger. It is propitious to appearance of circulation making for the summer rainfall in eastern Southwest China; furthermore, the vapor transport and convergent upward velocity are strengthened, the East Asian summer monsoon is weaker, and the ridge positions of the western Pacific subtropical high and South Asia high lean to south when the intensity of the atmospheric heat source over eastern Tibetan Plateau (key area) is stronger than normal, vice versa. |
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| Keywords: | eastern Southwest China drought/flood in summer atmospheric heat source over the Tibetan Plateau effect |
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