| 近几十年青藏高原夏季风变化趋势及其对中国东部降水的影响 |
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| 引用本文： | 华维,范广洲,王炳赟.近几十年青藏高原夏季风变化趋势及其对中国东部降水的影响[J].大气科学,2012,36(4):784-794. |
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| 作者姓名： | 华维 范广洲 王炳赟 |
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| 作者单位： | 1.成都信息工程学院大气科学学院,高原大气与环境四川省重点实验室,成都 610225;中国科学院大气物理研究所竺可桢—南森国际研究中心,北京 100029 |
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| 基金项目： | 国家重点基础研究发展计划2009CB421406, 中挪国际合作项目 “Exploring decadal to century scale variability and changes in the East Asian climate during the last Millennium (East Asia DecCen)”, 国家自然科学基金资助项目 40875053, 国家科技支撑计划 2009BAC51B03, 公益性行业(气象)科研专项GYHY201006023, 高原大气与环境四川省重点实验室开放课题 PAEKL-2010-K1 |
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| 摘 要： | 根据NCEP/NCAR、NCEP/DOE和ERA40再分析资料以及中国596个台站逐月降水观测资料,利用相关分析、小波分析和交叉谱分析等统计方法,分析了近几十年青藏高原夏季风变化趋势及其对中国东部降水的影响,探讨了影响高原夏季风长期变化的可能原因.结果表明:高原夏季风具有年际和年代际的多时间尺度变化特征,在1958～2...
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| 关 键 词： | 高原夏季风 东亚夏季风 南亚夏季风 热力差异 |
| 收稿时间： | 2011/9/26 0:00:00 |
| 修稿时间： | 3/9/2012 12:00:00 AM |
Variation of Tibetan Plateau Summer Monsoon and Its Effect on Precipitation in East China |
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| Hua Wei,Fan Guangzhou and WANG Bingyun.Variation of Tibetan Plateau Summer Monsoon and Its Effect on Precipitation in East China[J].Chinese Journal of Atmospheric Sciences,2012,36(4):784-794. |
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| Authors: | Hua Wei Fan Guangzhou and WANG Bingyun |
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| Institution: | 1.College of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225;Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 1000292.College of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225 |
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| Abstract: | Based on the NCEP/NCAR, NCEP/DOE and ERA40 reanalysis data and the monthly precipitation data from 596 stations of China, the variation of the Tibetan Plateau (TP) summer monsoon and its impact on precipitation in eastern China are investigated by using the correlation analysis, the wavelet analysis, and the cross-spectral analysis. The results show that the plateau summer monsoon exhibits the strong interannual and long-term variability. It also shows an obviously upward trend during 1958-2010. The further analysis reveals that the abnormal enhancement of the plateau summer monsoon changes the Asia atmospheric circulation and then weakens the Asian summer monsoon. This leads to an increase of monsoon rainfall over the middle-lower reaches of the Yangtze River and a decrease over North China and South China. The strengthening of the plateau summer monsoon over the past 50 years may be related to the enhancement of thermal difference between the TP and its surrounding plains in the middle-upper troposphere (especially of the increase of thermal difference between the TP and the plain in eastern China). |
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| Keywords: | Tibetan Plateau summer monsoon East Asian summer monsoon South Asian summer monsoon thermal difference |
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