| The Impact of Atmospheric Heat Sources over the Eastern Tibetan Plateau and the Tropical Western Pacific on the Summer Rainfall over the Yangtze-River Basin |
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| 作者姓名： | 简茂球 乔云亭 袁卓建 罗会邦 |
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| 作者单位： | Research Center for Monsoon and Environment/Department of Atmospheric Sciences, Sun Yat-sen￡Zhongshan¤University, Guangzhou 510275,Research Center for Monsoon and Environment/Department of Atmospheric Sciences, Sun Yat-sen￡Zhongshan¤University, Guangzhou 510275,Research Center for Monsoon and Environment/Department of Atmospheric Sciences, Sun Yat-sen￡Zhongshan¤University, Guangzhou 510275,Research Center for Monsoon and Environment/Department of Atmospheric Sciences, Sun Yat-sen￡Zhongshan¤University, Guangzhou 510275 |
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| 基金项目： | National Key Program for Developing Basic Research，中国科学院资助项目 |
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| 摘 要： | The variability of the summer rainfall over China is analyzed using the EOF procedure with a new parameter （namely, mode station variance percentage） based on 1951-2000 summer rainfall data from 160 stations in China. Compared with mode variance friction, the mode station variance percentage not only reveals more localized characteristics of the variability of the summer rainfall, but also helps to distinguish the regions with a high degree of dominant EOF modes representing the analyzed observational variable. The atmospheric circulation diagnostic studies with the NCEP/NCAR reanalysis daily data from 1966 to 2000 show that in summer, abundant （scarce） rainfall in the belt-area from the upper-middle reaches of the Yangtze River northeastward to the Huaihe River basin is linked to strong （weak） heat sources over the eastern Tibetan Plateau, while the abundant （scarce） rainfall in the area to the south of the middle-lower reaches of the Yangtze River is closely linked to the weak （strong） heat sources over the tropical western Pacific.
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| 关 键 词： | 西藏 太平洋 热带气象 长江 降雨量 夏季 |
| 收稿时间： | 2005-02-07 |
| 修稿时间： | 2005-10-21 |
The impact of atmospheric heat sources over the eastern Tibetan Plateau and the tropical western Pacific on the summer rainfall over the Yangtze-River basin |
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| Maoqiu Jian,Yunting Qiao,Zhuojian Yuan,Huibang Luo.The Impact of Atmospheric Heat Sources over the Eastern Tibetan Plateau and the Tropical Western Pacific on the Summer Rainfall over the Yangtze-River Basin[J].Advances in Atmospheric Sciences,2006,23(1):149-155. |
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| Authors: | Maoqiu Jian Yunting Qiao Zhuojian Yuan Huibang Luo |
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| Abstract: | The variability of the summer rainfall over China is analyzed using the EOF procedure with a new parameter (namely, mode station variance percentage) based on 1951-2000 summer rainfall data from 160 stations in China. Compared with mode variance friction, the mode station variance percentage not only reveals more localized characteristics of the variability of the summer rainfall, but also helps to distinguish the regions with a high degree of dominant EOF modes representing the analyzed observational variable.The atmospheric circulation diagnostic studies with the NCEP/NCAR reanalysis daily data from 1966 to 2000 show that in summer, abundant (scarce) rainfall in the belt-area from the upper-middle reaches of the Yangtze River northeastward to the Huaihe River basin is linked to strong (weak) heat sources over the eastern Tibetan Plateau, while the abundant (scarce) rainfall in the area to the south of the middle-lower reaches of the Yangtze River is closely linked to the weak (strong) heat sources over the tropical western Pacific. |
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| Keywords: | heat sources eastern Tibetan Plateau tropical western Pacific summer rainfall Yangtze River basin |
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