| 重庆区域旱涝指标及其变化特征分析 |
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| 引用本文： | 李永华,毛文书,高阳华,韩逢庆,李家启.重庆区域旱涝指标及其变化特征分析[J].气象科学,2006,26(6):638-644. |
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| 作者姓名： | 李永华 毛文书 高阳华 韩逢庆 李家启 |
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| 作者单位： | 1. 重庆市气象科学研究所,重庆,401147
2. 四川省绵阳市气象局,绵阳,621000 |
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| 基金项目： | 重庆市科技计划;重庆市科技攻关项目 |
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| 摘 要： | 利用重庆市34站月平均气温及降水量资料，定义了区域旱涝指数，采用小波等方法分析了重庆近40余年年及四季旱涝的变化特征。结果表明，文中所采用的区域旱涝指数考虑较为全面，能较好地刻画重庆区域年及各季的旱涝变化特征；重庆旱涝变化有明显的阶段性，不同尺度周期信号在时一频域中的分布具有较强的局部特征。
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| 关 键 词： | 区域旱涝指标 小波 变化特征 |
| 收稿时间： | 2005-08-15 |
| 修稿时间： | 2005-12-08 |
REGIONAL FLOOD AND DROUGHT INDICES IN CHONGQING AND THEIR VARIATION FEATURES ANALYSIS |
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| Li Yonghu,Mao Wenshu,Gao Yanghu,Han Fengqing and Li Jiaqi.REGIONAL FLOOD AND DROUGHT INDICES IN CHONGQING AND THEIR VARIATION FEATURES ANALYSIS[J].Scientia Meteorologica Sinica,2006,26(6):638-644. |
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| Authors: | Li Yonghu Mao Wenshu Gao Yanghu Han Fengqing and Li Jiaqi |
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| Institution: | 1.Chongqing Institute of Meteorological Sciences, Chongqing 401147; 2.Mianyang Meteorology Office ,Sichuan Province ,Mianyang 621000 |
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| Abstract: | Using the air temperature and precipitation of 34 stations in Chongqing, the regional flood and drought indices have been defined. The variation features of flood and drought of years and four seasons have been analyzed during the past more than 40 years based on some methods including MHF wavelet. The results indicate that the regional flood and drought indices depict obviously the variation features of flood and drought of years and four seasons in Chongqing area. And the obvious features for the variations of flood and drought in Chongqing contain are the development by stages. The signals with different scale have stronger local features in time-frequency distribution. |
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| Keywords: | Regional flood and drought indices Wavelet Variation features |
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