| 商丘暴雨日及分布特征研究 |
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| 引用本文： | 丁国超,张艳玲,余卫东,李春华,王慧娟.商丘暴雨日及分布特征研究[J].河南气象,2007(Z1). |
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| 作者姓名： | 丁国超 张艳玲 余卫东 李春华 王慧娟 |
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| 作者单位： | 商丘市气象局 河南商丘476000(丁国超，张艳玲，余卫东)，柘城县气象局 河南柘城476200(李春华，王慧娟) |
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| 摘 要： | 对商丘国家观象台1954-2005年月报表中挑取的符合暴雨日条件的142个样本分析,结果表明:商丘暴雨日具有明显的季节性,频发于7、8月份;暴雨日年平均2.73个;日暴雨量最大(193.3 mm)不超过200 mm;最长连续暴雨日数不超过2日;连续暴雨日降水量累计(223.9 mm)不超过250 mm;1 h最大降水量不超过70 mm。暴雨日的年代际变化特征明显,20世纪80年代后暴雨日出现较晚,60-90年代的暴雨日数递减,90年代后有增加趋势;大暴雨日数自60年代起有逐步增加趋势。暴雨日对月、年降水量有显著贡献,4-9月暴雨日对月降水量的贡献很大,且从4月到7月暴雨日的贡献呈递增趋势。一年内暴雨日出现5次时,当年的年雨量为偏多年份。
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| 关 键 词： | 暴雨日 月分布 年代际变化 |
Study on the Distribution Characteristics of Rainstorm Days in Shangqiu |
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| Ding Guochao,Zhang Yanling,Yu Weidong,Li Chunhua,Wang Huijuan.Study on the Distribution Characteristics of Rainstorm Days in Shangqiu[J].Meteorology Journal of Henan,2007(Z1). |
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| Authors: | Ding Guochao Zhang Yanling Yu Weidong Li Chunhua Wang Huijuan |
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| Institution: | Ding Guochao1,Zhang Yanling1,Yu Weidong1,Li Chunhua2,Wang Huijuan2 |
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| Abstract: | Analyze the 142 samples data coming from Shangqiu National Climate Observatory monthly reports during 1954-2005,the results show the rainstorm days have obvious changes in different seasons,rainstorms mainly occur in July and August.The annual mean rainstorm days are 2.73 and the daily maximum precipitation is 193.3 mm.The duration of the longest continued rainstorm days is less than 2 days and the sustained precipitation is 223.9 mm.The hour maximum precipitation is less than 70 mm.The characteristic of interdecadal variations is obvious.The rainstorm day occurrence is later in the 1980's.The rainstorm days decrease from 1960's to 1990's and increase since 1990's,and large rainstorm days are on the increase since 1960's.The rainstorm days which occurred during April to September make a valuable contribution towards monthly precipitation,but the contribution rate is decreasing during April to July.When rainstorms occur five times in one year,the rainfall amount in this year is more than other years. |
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| Keywords: | rainstorm days monthly distribution interdecadal variations |
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