| 增暖背景下中国东北地区极端降水事件的演变特征 |
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| 引用本文： | 杨素英,孙凤华,马建中.增暖背景下中国东北地区极端降水事件的演变特征[J].地理科学,2008,28(2):224-228. |
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| 作者姓名： | 杨素英 孙凤华 马建中 |
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| 作者单位： | 1. 中国气象科学研究院, 北京 100081;2. 南京信息工程大学, 江苏 南京 210044;3. 中国气象局沈阳大气环境研究所, 辽宁 沈阳110016 |
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| 基金项目： | 中国气象局气候变化专项(CCSF2007-17)资助. |
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| 摘 要： | 利用中国东北地区93站1959~2002年逐日降水资料,研究该区极端降水事件时空演变特征,结果表明:东北地区极端降水事件阈值由东南沿海向西北内陆逐渐减小,6~9月是极端降水事件集中出现月份;1985~2002年是极端降水事件偏多,且为一突变现象;东北地区短时间内连续发生极端降水事件概率较大,其中1~5天时间间隔极端降水事件占23.7%;80年代中期后东北地区增暖背景下,极端降水事件和有1~5天时间间隔的极端降水事件明显增加,特别是松花江下游和牡丹江流域及西辽河上游地区,频次和强度存在增加或增强趋势。
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| 关 键 词： | 东北地区 极端降水 M-K趋势检验 |
| 文章编号： | 1000-0690(2008)02-0224-05 |
| 收稿时间： | 2007-04-12 |
| 修稿时间： | 2007年4月12日 |
Evolvement of Precipitation Extremes in Northeast China on the Background of Climate Warming |
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| YANG Su-Ying,SUN Feng-Hua,MA Jian-Zhong.Evolvement of Precipitation Extremes in Northeast China on the Background of Climate Warming[J].Scientia Geographica Sinica,2008,28(2):224-228. |
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| Authors: | YANG Su-Ying SUN Feng-Hua MA Jian-Zhong |
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| Institution: | 1. Chinese Academy of Meteorological Sciences, Beijing 100081;2. Nanjing University of Information Science and Technology, Nanjing, Jiangsu 2100441;3. Institute of Atmospheric Environment, China Meteorological Dministration, Shenyang, Liaoning 110016 |
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| Abstract: | Determination of the threshold by Gamma distribution function and study on spatial and temporal change of precipitation extremes are based on the daily precipitation data of 93 stations during the period 1959-2002 in Northeast China.The main results are summarized as follows: The precipitation extremes' thresholds decreased gradually from the southeast littoral areas to the northwestern inland.Precipitation extremes were concentrated in JuneSeptember,and the increasing was a catastrophe during the period 1985-2002.The probability of the precipitation extremes successively occurred was greater,in which the neighbouring extremes separated by a time gap of 1-5 days was 23.7%.The total extremes increased especially in the lower reaches of the Songhua River and the Mudanjiang River,and the upper reaches of the Liaohe River,as the same with the precipitantion extreme with the time gap of 1-5 days. |
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| Keywords: | Northeast China precipitation extremes Mann-Kendall trend test |
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