| 长江流域1961-2002年极端降水特征 |
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| 引用本文： | 张增信,张强,姜彤.长江流域1961-2002年极端降水特征[J].地理学报(英文版),2007,17(1):33-42. |
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| 作者姓名： | 张增信 张强 姜彤 |
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| 作者单位： | [1]Jiangsu Key Laboratory of Forestry Ecological Engineering, Nanjing Forestry University, Nanjing 210037 China [2]Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China [3]Laboratory for Climate Studies, China Meteoro ogical Administration, Beijing 100081, China |
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| 基金项目： | Foundation： Funded by the Nanjing Institute of Geography and Limnology, CAS, No.S260018; The Chinese Meteorological Administration, No.ccsf2006-31 |
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| 摘 要： | The total precipitation of the highest 1 day, 3 day, 5 day and 7 day precipitation amount （R1 D, R3D, R5D and R7D） in the Yangtze River basin was analyzed with the help of linear trend analysis and continuous wavelet transform method. The research results indicated that： 1） Spatial distribution of RID is similar in comparison with that of R3D, R5D and R7D. The Jialingjiang and Hanjiang river basins are dominated by decreasing trend, which is significant at 〉95% confidence level in Jialingjiang River basin and insignificant at 〉95% confidence level in Hanjiang River basin. The southern part of the Yangtze River basin and the western part of the upper Yangtze River basin are dominated by significant increasing trend of RID extreme precipitation at 〉95% confidence level. 2） As for the R3D, R5D and R7D, the western part of the upper Yangtze River basin is dominated by significant increasing trend at 〉95% confidence level. The eastern part of the upper Yangtze River basin is dominated by decreasing trend, but is insignificant at 〉95% confidence level. The middle and lower Yangtze River basin is dominated by increasing trend, but insignificant at 〉95% confidence level. 3） The frequency and intensity of extreme precipitation events are intensified over time. Precipitation anomalies indicated that the southeastern part, southern part and southwestern part of the Yangtze River basin are dominated by positive extreme precipitation anomalies between 1993-2002 and 1961-1992. The research results of this text indicate that the occurrence probability of flash flood is higher in the western part of the upper Yangtze River basin and the middle and lower Yangtze River basin, esp. in the southwestern and southeastern parts of the Yangtze River basin.
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| 关 键 词： | 末端沉淀 变换方式 长江 盆地 |
| 收稿时间： | 25 September 2006 |
| 修稿时间： | 2006-09-252006-10-20 |
Changing features of extreme precipitation in the Yangtze River basin during 1961–2002 |
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| Zhang?Zengxin,Zhang?Qiang,Jiang?Tong.Changing features of extreme precipitation in the Yangtze River basin during 1961–2002[J].Journal of Geographical Sciences,2007,17(1):33-42. |
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| Authors: | Zhang Zengxin Zhang Qiang Jiang Tong |
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| Institution: | 1. Jiangsu Key Laboratory of Forestry Ecological Engineering,Nanjing Forestry University,Nanjing 210037,China;Nanjing Institute of Geography and Limnology,CAS,Nanjing 210008,China;Laboratory for Climate Studies,China Meteorological Administration,Beijing 100081,China
2. Nanjing Institute of Geography and Limnology,CAS,Nanjing 210008,China;Laboratory for Climate Studies,China Meteorological Administration,Beijing 100081,China |
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| Abstract: | The total precipitation of the highest 1 day, 3 day, 5 day and 7 day precipitation amount (R1D, R3D, R5D and R7D) in the Yangtze
River basin was analyzed with the help of linear trend analysis and continuous wavelet transform method. The research results
indicated that: 1) Spatial distribution of R1D is similar in comparison with that of R3D, R5D and R7D. The Jialingjiang and
Hanjiang river basins are dominated by decreasing trend, which is significant at >95% confidence level in Jialingjiang River
basin and insignificant at >95% confidence level in Hanjiang River basin. The southern part of the Yangtze River basin and
the western part of the upper Yangtze River basin are dominated by significant increasing trend of R1D extreme precipitation
at >95% confidence level. 2) As for the R3D, R5D and R7D, the western part of the upper Yangtze River basin is dominated by
significant increasing trend at >95% confidence level. The eastern part of the upper Yangtze River basin is dominated by decreasing
trend, but is insignificant at >95% confidence level. The middle and lower Yangtze River basin is dominated by increasing
trend, but insignificant at >95% confidence level. 3) The frequency and intensity of extreme precipitation events are intensified
over time. Precipitation anomalies indicated that the southeastern part, southern part and southwestern part of the Yangtze
River basin are dominated by positive extreme precipitation anomalies between 1993–2002 and 1961–1992. The research results
of this text indicate that the occurrence probability of flash flood is higher in the western part of the upper Yangtze River
basin and the middle and lower Yangtze River basin, esp. in the southwestern and southeastern parts of the Yangtze River basin.
Foundation: Funded by the Nanjing Institute of Geography and Limnology, CAS, No.S260018; The Chinese Meteorological Administration, No.ccsf2006-31
Author: Zhang Zengxin (1977–), Ph.D. Candidate, specialized in climatic changes. |
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| Keywords: | extreme precipitation event linear trend continuous wavelet transform Yangtze River basin |
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