| 多尺度干旱指数在江淮流域的适应性研究 |
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| 引用本文： | 蔡晓军,茅海祥,王文.多尺度干旱指数在江淮流域的适应性研究[J].冰川冻土,2013,35(4):978-989. |
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| 作者姓名： | 蔡晓军 茅海祥 王文 |
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| 作者单位： | 1. 南京信息工程大学 气象灾害教育部重点实验室, 江苏 南京 210044;2. 铜仁市气象局, 贵州 铜仁 554300 |
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| 基金项目： | 公益性行业(气象)科研专项(GYHY201006023);国家自然科学基金项目(41275091)资助 |
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| 摘 要： | 利用1960-2010年江淮流域34个地面气象观测站的逐日降水、日平均气温、相对湿度等实测资料, 分别计算了江淮流域的Z指数、降水距平百分率、相对湿润指数、标准化降水指数以及CI指数, 经与江淮流域干旱记录对比分析, 结果表明: 月尺度的Z指数在5种干旱指数中应用效果最好, 符合率达70%以上;在时间域上, 月尺度的Z指数仅在春季吻合率稍差, 其余月份均在70%以上;月尺度的SPI指数在冬季吻合率较差, 其余月份同Z指数总体相当;MI指数效果最差;日尺度的CI指数应用效果存在时空差异, 在河南最好, 在山东最差, 夏季效果最好, 春季、冬季最差.
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| 关 键 词： | 江淮流域 干旱指数 比对分析 适应性 |
| 收稿时间： | 2013-03-06 |
| 修稿时间： | 2013-05-28 |
Study of the Adaptability of Multiscale Drought Indices in Yangtse-Huaihe River Basins |
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| CAI Xiao-jun,MAO Hai-xiang,WANG Wen.Study of the Adaptability of Multiscale Drought Indices in Yangtse-Huaihe River Basins[J].Journal of Glaciology and Geocryology,2013,35(4):978-989. |
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| Authors: | CAI Xiao-jun MAO Hai-xiang WANG Wen |
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| Institution: | 1. Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing Jiangsu 210044, China;2. Tongren Meteorological Bureau, Tongren Guizhou 554300, China |
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| Abstract: | It has significant practical importance to study drought indices, which are the basis for research of arid climate. The Z-index, precipitation anomaly percentage, relative humidity index, standardized precipitation index, and CI index were calculated by using the data of daily precipitation, daily averaged temperature and relative humidity from 1960 to 2010 at 34 meteorological observation stations over the Yangtse-Huaihe River basins. Compared with drought records, it is found that Z-index is the best one among the five drought indexes for describing the drought events with the coincidence rate up to 70%. Temporally, Z-index is good normally, except in April-June, with a match rate of more than 70%. SPI index is as good as Z-index, except in January-February. MI index is the poorest among the five drought indices. CI index is most suitable in Henan Province, but is poor in Shandong Province. It seems better in summer than in spring and autumn. Seasonally, CI is most suitable in summer, followed by Z-index and SPI. In autumn and winter Z-index is rather good, followed by SPI and Pa. In spring, SPI and Pa are good. |
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| Keywords: | Yangtse-Huaihe River basins drought indices comparing analysis adaptability |
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