| 近37年甘肃省降水特征分析 |
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| 引用本文： | 王燕,王润元,王毅荣,王鹤龄.近37年甘肃省降水特征分析[J].干旱区资源与环境,2009(4). |
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| 作者姓名： | 王燕 王润元 王毅荣 王鹤龄 |
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| 作者单位： | 兰州交通大学环境与市政工程学院;中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室中国气象局干旱气候变化与减灾重点开放实验室; |
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| 基金项目： | 科技部科研院所社会公益研究专项(2005DIB3J100);;甘肃省自然科学基金(3ZS061-A25-010)共同资助 |
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| 摘 要： | 选取甘肃省61个气象站1965-2001年共37 a逐日降水资料,通过有关统计量的计算,对甘肃省月降水量的基本时空特征及稳定性进行了研究;对月降水资料经标准化处理后做了EOF、REOF、小波分析,研究其异常的时空结构特征。结果表明:甘肃省降水自西北向东南呈增加趋势,降水量集中在夏季,稳定性随降水增加而增加,但降水基本呈正偏态,降水年际变化的线性趋势并不显著;甘肃省降水存在3种变化模态:全省一致型、东南-西北反向型、自西北向东南呈正、负、正变化型;可将甘肃省降水分为4个敏感区:东南区、陇西区、陇中区和西北区;甘肃省降水在不同的时间尺度下具有不同的突变点,降水在33 a尺度上呈减少趋势,4 a准周期比较显著。
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| 关 键 词： | 甘肃省 月降水量 基本特征 异常特征 |
Study on the precipitation characteristics in Gansu Province |
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| WANG Yan,WANG Runyuan,WANG Yirong,WANG Heling.Study on the precipitation characteristics in Gansu Province[J].Journal of Arid Land Resources and Environment,2009(4). |
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| Authors: | WANG Yan WANG Runyuan WANG Yirong WANG Heling |
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| Institution: | 1.School of Environmental and Municipal Engineering;Lanzhou Traffic University;Lanzhou 730070;2.Institute of Arid Meteorology;China Meteorological Administration;Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province;Key Openning Laboratory of Arid Change and Reduction Disaster of CMA;Lanzhou 730020;China |
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| Abstract: | Based on the daily precipitation data of 61 meteorological stations in Gansu Province in 1965-2001,the basic characteristics of monthly precipitation were analyzed by using relevant methods;the singular characteristic of spatial and temporal distribution was studied by using the methods of EOF,REOF and Maxican hat wavelet.The results showed such characteristics were as these: firstly,precipitation was increasing from northwest to southeast in Gansu Province.The precipitation in summer shared a very importan... |
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| Keywords: | Gansu Province Monthly precipitation Basic characteristic Singular characteristic |
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