| 1962-2011年湖南省大暴雨时空分布特征 |
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| 引用本文： | 李巧媛,唐明晖.1962-2011年湖南省大暴雨时空分布特征[J].气象与环境学报,2013,29(3):52-57. |
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| 作者姓名： | 李巧媛 唐明晖 |
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| 作者单位： | 湖南省气象台，湖南 长沙 410118 |
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| 基金项目： | 国家自然科学基金（41140004和41271095）资助. |
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| 摘 要： | 利用1962-2011年湖南省97个气象站逐日降水量资料，利用时序分析与聚类分析等方法，对湖南省大暴雨时间和空间分布特征进行分析。结果表明：从时间来看，20世纪90年代是湖南省大暴雨出现最多的10 a；1962-2011年，湖南省大暴雨日以0.73 d/10 a的平均速率增加。夏季是湖南省大暴雨最集中的季节；冬季没有出现过大暴雨；6-7月为大暴雨最集中的月份。从空间来看，湖南省西北部和东北部是大暴雨的两个高频区；湖南大暴雨划分为三季型、双季型和单季型3种类型，依次主要分布在湖南省西南部、中部地区以及西北部和东南部。
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| 关 键 词： | 大暴雨 时空分布 聚类分析 湖南 |
Temporal and spatial distributions of heavy rainstorm from 1962 to 2011 in Hu＇nan province |
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| LI Qiao-yuan,TANG Ming-hui.Temporal and spatial distributions of heavy rainstorm from 1962 to 2011 in Hu＇nan province[J].Journal of Meteorology and Environment,2013,29(3):52-57. |
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| Authors: | LI Qiao-yuan TANG Ming-hui |
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| Institution: | Hunan Meteorological Observatory, Changsha 410118, China |
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| Abstract: | Base on the daily precipitation data in 97 weather stations from 1962 to 2011 in Hu＇nan province,the temporal and spatial characters of the heavy rainstorm were analyzed by methods of a time series analysis and a cluster analysis. The results indicate that the heavy rainstorm day is in an increasing trend with 0. 73 day per decade from 1962 to 2011 ,and the peak value appears in 1990s. The heavy rainstorm day mainly appears in summer,espe- cially in June and July, while it never happens in winter. For the spatial distribution, the two high frequencies re- gions of heavy rainstorm occur in the northwest and northeast of Hu＇nan province. The heavy rainstorm could be divided into three types,i, e. a single-season type, a double-season type and a three-season type, and they are corre- spondingly located in the southwest,the middle,the northwest and southeast of Hu＇nan province respectively. |
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| Keywords: | The heavy rainstorm Temporal and spatial distribution Clustering analysis |
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