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大气科学  2007 

青藏高原地表热力异常与我国江淮地区夏季降水的关系

DOI: 10.3878/j.issn.1006-9895.2007.01.15

Keywords: 青藏高原,地表温度,空间热力差异,江淮地区夏季降水

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Abstract:

利用NCEP/NCAR再分析月平均资料和中国160站降水资料,分析了1951~2000年间5月青藏高原主体、高原东部和高原西部(90°E分界)地表温度的变化特征及其与江淮地区夏季降水的关系。结果发现:在研究高原热力异常对我国江淮地区夏季降水的影响时,要考虑到高原热力状况的空间差异对其的影响。相关分析发现,与高原主体和高原西部相比,高原东部地表温度变化对7月江淮地区的降水有更好的指示性。高原东部和其以北区域的大尺度热力差异比高原本身的热力异常对江淮地区夏季降水有更好的指示意义,可以作为我国江淮地区夏季降水的一个预报因子。

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