| 1959～2011年潮阳前后汛期降水的对比分析 |
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| 引用本文： | 杜勤博.1959～2011年潮阳前后汛期降水的对比分析[J].广东气象,2012,34(3):10-12. |
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| 作者姓名： | 杜勤博 |
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| 作者单位： | 广东潮阳区气象局,广东潮阳,515100 |
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| 摘 要： | 根据潮阳气象站1959～2011年逐日降水资料,研究了近53年来潮阳区降水的变化特征,结果表明,前汛期和后汛期各个降水指数变化规律存在很大区别:(1)前汛期降水量、降水强度、降水频率和暴雨日数均呈下降趋势,而后汛期降水量、降水强度和暴雨日数呈上升趋势；(2)前汛期存在8年和3年的短周期,后汛期周期变化不明显；(3)前汛期极端降水量发生突变,分别是1965年和1985年,20世纪90年代后极端降水量呈明显下降趋势,而后汛期极端降水量在20世纪90年代后呈上升趋势.
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| 关 键 词： | 天气学 极端降水 前汛期 后汛期 潮阳 |
Comparative Analysis of Precipitation between the First and Second Flood Season in Chaoyang from 1959 to 2011 |
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| DU Qin-bo.Comparative Analysis of Precipitation between the First and Second Flood Season in Chaoyang from 1959 to 2011[J].Journal of Guangdong Meteorology,2012,34(3):10-12. |
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| Authors: | DU Qin-bo |
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| Institution: | DU Qin-bo(Chaoyang Meteorological Bureau of Guangdong,Chaoyang 515100,China) |
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| Abstract: | Based on daily precipitation data from Chaoyang Meteorological Bureau during 1959 to 2011,the spatial variations of extreme precipitation in the flood season of Chaoyang are studied in this paper.The result shows that(1) the precipitation indices differ significantly between the first and the second flood season;(2) the rainfall amount,precipitation intensity,precipitation frequency and rainstorm day were declining during the period in the first flood season,mutating in 1965 and 1985;(3) after 1990’s,there is an evident downward(upward) trend in extreme precipitation in the first(second) flood season. |
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| Keywords: | synoptics extreme precipitation variation characteristics first flood season second flood season Chaoyang |
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