| 我国中南地区降水的分布特征及其对长江流量的影响 |
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| 引用本文： | 郭其蕴,司有元,王继琴.我国中南地区降水的分布特征及其对长江流量的影响[J].地理研究,1982,1(3):33-42. |
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| 作者姓名： | 郭其蕴 司有元 王继琴 |
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| 作者单位： | 中国科学院地理研究所 |
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| 摘 要： | 本文分析了23—34°N,100—113°E所包围地区内汎期(4—10月)月雨量的分布特征,及其对长江上游流量的影响。在上述范围内选取了60个雨量站,资料年代从1953到1979年计27年。采用特征向量分析,把这一地区汎期月雨量的分布归纳为14种型,并讨论了各型的特征。同时计算了长江上游各月平均流量与同期各站雨量的相关,根据相关分布图,探讨了各月雨量分布对长江上游流量的影响。
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THE SPATIAL CHARACTERISTICS OF MONTHLY MEAN RAINFALL ANOMALIES OVER CENTRAL-SOUTH CHINA IN RELATION TO THE DISCHARGE AT THE UPPER CHANG-JIANG |
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| Guo Qiyun,Si Youyuan,Wang Jiqin.THE SPATIAL CHARACTERISTICS OF MONTHLY MEAN RAINFALL ANOMALIES OVER CENTRAL-SOUTH CHINA IN RELATION TO THE DISCHARGE AT THE UPPER CHANG-JIANG[J].Geographical Research,1982,1(3):33-42. |
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| Authors: | Guo Qiyun Si Youyuan Wang Jiqin |
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| Institution: | Institute of Geography, Academia Sinica |
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| Abstract: | First, the spatial distribution of rainfall anomalies of Central-South China (23-34°N, 100-113°E) was examined by means of the empirical orthogonal function analysis. The data used in this paper are collected from 60 stations, monthly mean rainfall observations from April to October during the last 27 years (1953-1979). The monthly mean rainfall anomalies in Central-South China have been classified into fourteen types. The first four types ane characterized by the seasonal migration of the rain-belt,and each of the other types reflects a definite structure which can be easily interpreted with synoptic-climatological knowledge.Secondly, the correlation coefficients were calaulated to show the relationships between the rainfall and the discharge at the upper Changjiang for every month from April to October. The results show that regions in which correlation coefficients are higher than 0.37 (at 5% significant level) shift obviously with the season. The region or the socalled key region, in which rainfall is more important for the discharge, sometimes coincides with the variance centers of the first eigenvector and sometimes not. In most cases this key region is in accordance with the second eigenvector, or even the third eigenvector. It turns out that in spite of the close relation between the rainfall and the discharge at the upper Chang-Jiang, both of then are somewhat independent in their variations. So, we must pay more attention to the difference between them in studying the formation of discharge anomolies and in making long-range forecast of droughts and floods at the upper Chang-Jiang. |
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