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      氣候變化研究進展 ?? 2008, Vol. 4 ?? Issue (002): 95-100.

      ? 研究短論 ? 上一篇    下一篇

      1880-2006年中國夏季雨帶類型的年代際變化特征

      趙振國 朱艷峰 柳艷香 許力 孫林海 李想   

      1. 國家氣候中心 氣候診斷預測室 國家氣候中心預測室 國家氣候中心 國家氣候中心
      • 收稿日期:2007-08-14 修回日期:2007-12-07 出版日期:2008-03-31 發(fā)布日期:2008-03-31
      • 通訊作者: 趙振國

      Decadal Variation of Summer Rain-Pattern in China During 1880-2006

        

      • Received:2007-08-14 Revised:2007-12-07 Online:2008-03-31 Published:2008-03-31

      摘要: 利用1880-2006年中國東部地區(qū)夏季降水量及1951-2006年中國160個站夏季降水量和北半球大氣環(huán)流資料,在夏季降水分型的基礎(chǔ)上,研究了夏季雨型的年代際變化規(guī)律,分析了夏季各類雨型所對應的北半球500 hPa環(huán)流場的主要特征。結(jié)果表明:東部季風區(qū)和西部區(qū)存在著20~40 a左右的年代際振蕩趨勢,東北區(qū)則表現(xiàn)為明顯的15 a左右的年代際變化特點;東部季風區(qū)四類雨型東亞大氣環(huán)流差異顯著,西部區(qū)二類雨型和東北區(qū)二類雨型歐亞大氣環(huán)流的配置基本都相反。

      關(guān)鍵詞: 中國, 夏季雨型, 年代際變化, 環(huán)流特征

      Abstract: Based on the summer precipitation data in eastern China during 1880-2006 and at 160 stations in China during 1951-2006, and 500 hPa geopotential height data in the North Hemisphere during 1951-2006, the decadal variation law of summer rain-pattern was explored. The results show that there existed obvious 20-to 40-year period in the eastern monsoon region and the western region, and about 15-year period in the northeastern region of China. Additionally, the main features of geopotential heights at 500 hPa in the Northern Hemisphere for different summer rain-patterns were analyzed. Results show obvious differences of East Asian circulation for four rain-patterns in the eastern monsoon region, and the basically opposite allocation of Eurasia circulation pattern between the two rain-patterns in the western region and the two rain-patterns in the northeastern China.

      Key words: China, summer rain-pattern, decadal variation, circulation feature

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