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      氣候變化研究進(jìn)展 ?? 2007, Vol. 03 ?? Issue (06): 356-361.

      ? 研究短論 ? 上一篇    下一篇

      1959-2003年青海省干濕變化分析

      史津梅 唐紅玉 許維俊 王志偉   

      1. 青海省氣象臺 青海省氣象局氣候中心
      • 收稿日期:2007-04-11 修回日期:2007-08-01 出版日期:2007-11-30 發(fā)布日期:2007-11-30
      • 通訊作者: 史津梅

      Dryness/Wetness Changes in Qinghai Province During 1959-2003

        

      • Received:2007-04-11 Revised:2007-08-01 Online:2007-11-30 Published:2007-11-30

      摘要: 利用青海省1959-2003年氣象資料,計算了修正的Palmer干旱指數,并對其進(jìn)行了分析。結果表明:在青海省旱澇監測中,PDSI指數反映旱澇程度更為客觀(guān);青海省的干旱主要以輕旱為主;夏秋季年際干濕交替較冬春季頻繁,變化振幅也較大;秋季青海省干旱化傾向最為嚴重,冬春季出現輕旱幾率最大。另外,春季干旱總面積在減小;夏季輕旱面積增加,而中旱、重旱面積在減小;秋冬季重旱面積在增加。

      關(guān)鍵詞: 青海省, PDSI指數, 干旱, 濕潤

      Abstract: Based on analyses of the meteorological data at 29 meteorological stations in Qinghai Province from 1959 to 2003, the corrected Palmer drought severity index (PDSI) was calculated and analyzed. The results show that the PDSI is more objective in comparison with Z index in dryness/wetness monitoring. Most of droughts were light in Qinghai, the interannual alternations of dryness/wetness in summer and autumn were more frequent with larger change ranges in comparison with winter and spring. The drought trend in autumn was the severest, and the probability of light drought was the largest in winter and spring. Moreover, the total drought area in Qinghai Province decreased in spring, the light drought area increased in summer, but the medium and heavy drought area decreased, and the severe drought area increased in winter and autumn during 1959-2003.

      Key words: Qinghai Province, PDSI, dryness, wetness

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