青藏高原年降水量的氣候變化及其異常類型研究

doi:10.3969/2012jms.00**

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青藏高原年降水量的氣候變化及其異常類型研究
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                        10.3969/2012jms.00**
                    
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中圖分類號:P461
基金項目:中國科學院知識創(chuàng)新項目 (kzcx1 sw 0 4 )，科技部社會公益研究項目 (2 0 0 1DIB10 0 85 )資助

STUDIES ON CLIMATIC VARIATION AND ANOMALY TYPES OF THE ANNUAL PRECIPITATION OVER QINGHAI-XIZANG PLATEAU

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利用青藏高原的80個氣象臺站近34a來年降水量資料，采用EOF、REOF、氣候趨勢線性趨勢分析以及累積距平法等方法對青藏高原年降水量的時空分布特征及其異常進行了分析。結果表明：EOF分解的前三個主向量的累積方差貢獻占總方差的44．9％，地形特別是高原主體的阻擋和抬升作用對年降水量的空間變化影響顯著；年降水量的時間變化在緩慢減少的過程中于1982年和1995年發(fā)生了2次突變，并經(jīng)歷了減少、增多和再次減少的3個變化階段；青藏高原年降水量的空間異常類型均可分為高原中東區(qū)、高原南部區(qū)、高原北部區(qū)、高原腹地區(qū)和西藏

Abstract:

Temporal and spatial distribution features of th e annual precipitaion and its anomaly over Qinghai-Xizang Plateau are analyzed with the use of precip it ation data in the near 34 years from 80 stations there in combination with those methods such as EOF, REOF, linear trend analysis of climatic trend and cumulati ve average deviation, etc. The results show that cumulative variance contributio n of the first three load vector quantities from EOF resolution accounts for 44. 9 percent of the totol. Plateau orographic effects, especially the effects of it s obstruction and lifting of the main plateau body,are remarkable on the spatial changes of the annual precipitation. During its slow decreasing changes with th e time two jump changes of the annual precipittion occurred in 1 982 and 1989 respect ively. Also the changes spanned three stages as decreasing, increasing a little and a second decreasing. All spatial anomaly types of the annual precipitation o ver the plateau can be classified into five areas, such as in the center and eas t, in the south, in the north, in the plateau hinterland, and in the southwest o f Xizang, and that the dominating influence of the relief and the low eddy are c omparatively marked on this kind of classification.

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朱西德,李林,秦寧生,周陸生,江青春.青藏高原年降水量的氣候變化及其異常類型研究.氣象科學,2003,(4):451-459 Zhu Xide, Li Lin, Qin Ningsheng, Zhou Lusheng, Wang Qingchun. STUDIES ON CLIMATIC VARIATION AND ANOMALY TYPES OF THE ANNUAL PRECIPITATION OVER QINGHAI-XIZANG PLATEAU. Journal of the Meteorological Sciences,2003,(4):451-459

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收稿日期:2002-06-28
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