| 青藏高原大气热源与江淮梅雨异常的关系 |
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| 引用本文： | 毛文书,巩远发,周强.青藏高原大气热源与江淮梅雨异常的关系[J].高原气象,2009,28(6):1291-1298. |
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| 作者姓名： | 毛文书 巩远发 周强 |
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| 作者单位： | 成都信息工程学院,大气科学学院,四川,成都,610225 |
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| 基金项目： | 国家自然科学基金，成都信息工程学院科研基金，中国气象局成都高原气象研究所基本科研项目 |
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| 摘 要： | 利用江淮流域1954\_2001年梅雨量资料和同期内美国NCEP/NCAR 逐日高度场、 风场、 比湿场和地面气压场再分析资料， 网格距为2.5°×2.5°。采用模糊聚类、 EOF分解、 合成分析、 SVD分解等方法， 详细讨论了青藏高原大气热源与江淮梅雨的关系。结果表明： 梅雨量区域指数能很好地揭示江淮流域梅雨量的丰枯， 高原大气热源大致以90°E为界， 可分为高原东部型和西部型; 高原大气热源与梅雨量存在显著相关关系， 高原大气热源东部型与江淮梅雨量呈显著正相关关系， 西部型与梅雨量呈显著负相关关系、说明高原大气热源东部型增强， 西部型减弱, 江淮梅雨量异常偏多。高原大气热源东部型减弱， 西部型增强， 江淮梅雨量异常偏少; 反之亦然、SVD分解结果与合成分析的结果完全一致。
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| 关 键 词： | 青藏高原 梅雨 大气热源 模糊聚类 SVD分析 |
Relationship between Atmospheric Heat Source in Tibetan Plateau and Abnormality of Meiyu in Changjiang-Huaihe River Valley |
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| MAO Wen-shu,GONG Yuan-fa,ZHOU Qiang.Relationship between Atmospheric Heat Source in Tibetan Plateau and Abnormality of Meiyu in Changjiang-Huaihe River Valley[J].Plateau Meteorology,2009,28(6):1291-1298. |
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| Authors: | MAO Wen-shu GONG Yuan-fa ZHOU Qiang |
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| Abstract: | Based on the precipitation of Meiyu at 37 stations in the Changjiang-Huaihe River valley and the daily reanalysis geopotential height,wind field,humidity field and surface pressure field data(Grid 2.5°×2.5°) from 1954 to 2001,the relationship between the atmospheric heat source in the Tibetan Plateau and the abnormality of Meiyu in the Changjiang-Huaihe River valley is studied by terms of the fuzzy cluster analysis,EOF,composite analysis,SVD analyses,and so on. The results show that there are notable correlation between the reginal index of Meiyu precipitation in the good(poor) Meiyu year and the atmospheric heat source in the Tibetan Plateau. The atmospheric heat source in the Tibetan Plateau is devided into the east and north patterns according to the 90°E. There are positive or negative correlation between the atmospheric heat source in the Tibetan Plateau and the precipitation in the Changjiang-Huanhe River valley. The atmospheric heat source in the eastern (western) of the Tibetan Plateau is marked increasing(decreasing) while the precipitation is is marked increasing(decreasing) in the Changjiang-Huaihe River valley,and vice verse. |
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| Keywords: | Tibetan Plateau Meiyu Atmospheric heat source Fuzzy Cluste analyses SVD analyses |
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