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      氣候變化研究進(jìn)展 ?? 2008, Vol. 4 ?? Issue (002): 101-105.

      ? 研究短論 ? 上一篇    下一篇

      1960-2005年湖南省降水的變化

      張劍明 黎祖賢 章新平   

      1. 湖南師范大學(xué)資源與環(huán)境科學(xué)學(xué)院
      • 收稿日期:2007-04-03 修回日期:2007-11-11 出版日期:2008-03-31 發(fā)布日期:2008-03-31
      • 通訊作者: 張劍明

      Precipitation Change in Hunan Province

        

      • Received:2007-04-03 Revised:2007-11-11 Online:2008-03-31 Published:2008-03-31

      摘要: 利用線性回歸、突變分析及小波分析方法,分析了湖南省1960-2005年86個(gè)地面臺(tái)站降水量的變化。結(jié)果表明:46 a來湖南省年降水量呈增加的趨勢(shì),氣候傾向率為21.8 mm/10a,其中春秋兩季降水量呈減少趨勢(shì),夏冬兩季降水量呈顯著增加的趨勢(shì),11 a滑動(dòng)平均曲線表明,今后湖南省降水量有減少趨勢(shì); 湖南省在1990年代初年降水量增多是一突變現(xiàn)象,主要是夏冬降水量發(fā)生突變,而春秋兩季無(wú)突變現(xiàn)象;湖南省年降水量和四季降水量存在4個(gè)主要周期的變化。

      關(guān)鍵詞: 湖南省, 降水變化, 突變分析, 小波分析

      Abstract: The change of precipitation in Hunan Province since recent 46 years was analyzed by using linear regression, abrupt change analysis and wavelet analysis. The results showed that the annual precipitation increased at a climatic tendency of 21.8 mm/10a. However, the 11-year running mean curve showed that it will decrease in the future. Precipitations in spring and autumn were decreasing in most of the areas, while summer and winter precipitations both had increasing trends. There existed a wetter trend in summer and winter in Hunan Province in the last 46 years. The abrupt change occurred in summer and in winter during the early 1990s. Generally, both annual precipitation and seasonal precipitation presented four kinds of periodic change.

      Key words: Hunan Province, precipitation change, abrupt change analysis, wavelet analysis

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