| 青藏高原年降水量的气候变化及其异常类型研究 |
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| 引用本文： | 朱西德,李林,秦宁生,周陆生,江青春.青藏高原年降水量的气候变化及其异常类型研究[J].气象科学,2003,23(4):451-459. |
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| 作者姓名： | 朱西德 李林 秦宁生 周陆生 江青春 |
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| 作者单位： | 青海省气候资料中心,西宁,810001 |
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| 基金项目： | 中国科学院知识创新项目 (kzcx1 sw 0 4 )，科技部社会公益研究项目 (2 0 0 1DIB10 0 85 )资助 |
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| 摘 要： | 利用青藏高原的80个气象台站近34a来年降水量资料，采用EOF、REOF、气候趋势线性趋势分析以及累积距平法等方法对青藏高原年降水量的时空分布特征及其异常进行了分析。结果表明：EOF分解的前三个主向量的累积方差贡献占总方差的44．9％，地形特别是高原主体的阻挡和抬升作用对年降水量的空间变化影响显著；年降水量的时间变化在缓慢减少的过程中于1982年和1995年发生了2次突变，并经历了减少、增多和再次减少的3个变化阶段；青藏高原年降水量的空间异常类型均可分为高原中东区、高原南部区、高原北部区、高原腹地区和西藏西南区共5个区，其分区主要受地形和低涡的影响较明显。
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| 关 键 词： | 青藏高原 气候变化 气候异常 FOF REOF |
| 收稿时间： | 2002/6/28 0:00:00 |
| 修稿时间： | 2002年6月28日 |
STUDIES ON CLIMATIC VARIATION AND ANOMALY TYPES OF THE ANNUAL PRECIPITATION OVER QINGHAI-XIZANG PLATEAU |
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| Zhu Xide,Li Lin,Qin Ningsheng,Zhou Lusheng and Wang Qingchun.STUDIES ON CLIMATIC VARIATION AND ANOMALY TYPES OF THE ANNUAL PRECIPITATION OVER QINGHAI-XIZANG PLATEAU[J].Scientia Meteorologica Sinica,2003,23(4):451-459. |
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| Authors: | Zhu Xide Li Lin Qin Ningsheng Zhou Lusheng and Wang Qingchun |
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| Abstract: | Temporal and spatial distribution features of the annual precipitaion and its anomaly over Qinghai-Xizang Plateau are analyzed with the use of precipitation 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 cumulative average deviation, etc. The results show that cumulative variance contribution 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 its obstruction and lifting of the main plateau body,are remarkable on the spatial changes of the annual precipitation. During its slow decreasing changes with the time two jump changes of the annual precipittion occurred in 1982 and 1989 respectively. Also the changes spanned three stages as decreasing, increasing a little and a second decreasing. All spatial anomaly types of the annual precipitation over the plateau can be classified into five areas, such as in the center and east, in the south, in the north, in the plateau hinterland, and in the southwest of Xizang, and that the dominating influence of the relief and the low eddy are comparatively marked on this kind of classification. |
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| Keywords: | Qinghai-Xizang Plateau Climatic variation Climatic anomaly EOF REOF |
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