| 1961-2005年黄河流域极端气候事件变化趋势 |
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| 引用本文： | 陈效逑,刘立,尉杨平.1961-2005年黄河流域极端气候事件变化趋势[J].人民黄河,2011,33(5). |
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| 作者姓名： | 陈效逑 刘立 尉杨平 |
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| 作者单位： | 北京大学城市与环境学院,北京,100871 |
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| 基金项目： | 中国-欧盟流域管理项目 |
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| 摘 要： | 利用黄河流域58个气象站点1961-2005年的逐日平均气温、最高气温、最低气温和逐日降水量数据,采用百分比阈值法定义极端气温和极端强降水事件,计算气象综合干旱指数(CI),并分析了黄河流域极端气候事件的变化趋势及其空间格局.结果表明:黄河流域极端低温和极端高温天数分别呈减少和增加趋势,平均速率分别为-3.8d/10a和1.7d/10a;年极端强降水总量的变化趋势存在着明显的区域差异,河源区增加最显著,而中游的黄土高原中、东部减少最显著;干旱天数呈减少趋势,河源区减幅最大,河套-宁夏平原以及鄂尔多斯高原西北部的减幅最小.
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| 关 键 词： | 极端气温 极端强降水 气象综合干旱指数 变化趋势 黄河流域 |
Variation Trend of Extreme Climate Events of the Yellow River Basin in 1961-2005 Period |
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| CHEN Xiao-qiu,LIU Li,WEI Yang-ping.Variation Trend of Extreme Climate Events of the Yellow River Basin in 1961-2005 Period[J].Yellow River,2011,33(5). |
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| Authors: | CHEN Xiao-qiu LIU Li WEI Yang-ping |
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| Affiliation: | CHEN Xiao-qiu,LIU Li,WEI Yang-ping(College of Urban and Environmental Sciences,Beijing University,Beijing 100871) |
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| Abstract: | The paper defines the events of extreme climate and extreme strong precipitation,calculates the comprehensive meteorological drought index(CI) and analyzes the variation trend and its spatial pattern of extreme climate events happened in the Yellow River basin by using the data of daily average temperature,the maximum and minimum temperature and daily precipitation of 58 weather stations during 1961-2005 period of the basin and using the method of threshold value.The outcomes show that a) the days of the lo... |
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| Keywords: | extreme climate extreme strong precipitation comprehensive meteorological drought index variation trend the Yellow River basin |
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