| 长江中游地区暴雨过程的气候背景分析 |
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| 引用本文： | 杨扬,周国良,戚建国,黄嘉佑.长江中游地区暴雨过程的气候背景分析[J].水科学进展,2005,16(4):546-551. |
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| 作者姓名： | 杨扬 周国良 戚建国 黄嘉佑 |
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| 作者单位： | 1.水利部水利信息中心, 北京, 100053; |
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| 摘 要： | 通过用气候信号场研究长江中游地区暴雨发生的气候异常环境,提出了关于信号场的合成图的检验方法,应用到暴雨规律分析中。分析表明,暴雨与500hPa信号场中异常信号显著区的出现在我国东部上空,分布形势呈‘+-+'的波列是暴雨发生的重要征兆。
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| 关 键 词： | 暴雨 500hPa信号场 合成分析 长江中游 气候背景 |
| 文章编号： | 1001-6791(2005)04-0546-06 |
| 收稿时间： | 2004-03-30 |
| 修稿时间： | 2004年3月30日 |
Background of climatic anomalies about heavy rain in middle reaches of the Yangtze River in China |
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| YANG Yang,ZHOU Guo-liang,QI Jian-guo,HUANG Jia-you.Background of climatic anomalies about heavy rain in middle reaches of the Yangtze River in China[J].Advances in Water Science,2005,16(4):546-551. |
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| Authors: | YANG Yang ZHOU Guo-liang QI Jian-guo HUANG Jia-you |
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| Institution: | 1.Water Resources Information Center, MWR, Beijing 100053, China;2.Department of Atmospheric Science, School of Physics, Peking University, Beijing 100871, China |
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| Abstract: | The background of climatic anomalies relating to heavy rainfalls over the middle reaches of the Yangtze River in China are studies in this paper. A t-test for composite signal field is performed. The case studies of heavy rainfall show that the distribution of significant anomaly in the 500 hPa signal field is an important precursory signal of heavy rainfall. The pattern of the signal anomaly with ‘+-+' in the composite signal field in the cases is found. It occurs in the area over eastern part of China. |
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| Keywords: | heavy rainfall 500 hPa signal field composite analysis middle reaches of the Yangtze River background of climatic |
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