| 广东沿海降水长期变化特征与极值分析——以汕尾、广州、阳江3市为例 |
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| 引用本文： | 肖莞生,陈子燊.广东沿海降水长期变化特征与极值分析——以汕尾、广州、阳江3市为例[J].热带地理,2010,30(2). |
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| 作者姓名： | 肖莞生 陈子燊 |
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| 作者单位： | 中山大学,水资源与环境系,广州,510275 |
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| 基金项目： | 国家自然科学基金重点项目 |
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| 摘 要： | 利用汕尾站、广州站和阳江站1953-2008年56a的逐月降水量、逐月的日最大降水量作为基本资料,探讨广东省降水量的时空分布特征、长期变化趋势及突变分析。Morlet小波变换表明各城市降水量存在着7.8a和11a等周期变化,与厄尔尼诺和太阳黑子的运动周期相关。其次运用皮尔逊Ⅲ型分析3城市的最大日降雨量的极值分布情况,其中阳江站5年一遇的年最大日降水量300mm,达到特大暴雨的标准。M-K检验表明阳江站和广州站降水量分别于1971、1981年发生突变,年降水量由少雨期进入多雨期,且R/S分析表明其增长趋势持续至今,但不同站点有各自的变化特点。
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| 关 键 词： | 广东沿海 降水量 长期变化趋势 极值分布 周期变化 |
Analysis of the Characteristics and Extreme Value of Rainfall in Three Coastal Cities of Guangdong Province |
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| XIAO Guansheng,CHEN Zishen.Analysis of the Characteristics and Extreme Value of Rainfall in Three Coastal Cities of Guangdong Province[J].Tropical Geography,2010,30(2). |
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| Authors: | XIAO Guansheng CHEN Zishen |
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| Institution: | XIAO Guansheng,CHEN Zishen (Department of Geographycal Science , planning,Sun Yat-sen University,Guangzhou 510275,China) |
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| Abstract: | By using the monthly rainfall data and the maximum daily precipitation data in each month of Shanwei Station,Guangzhou Station and Yangjiang Station during 1953-2008,the characteristics of spatial distribution,the long term trend and abruption are discussed.The result shows that:Morlet wavelet transform was applied to the analysis of the 56 years(1953-2008)monthly precipitation,changes in multi-time scale of monthly precipitation has probed.The periodic variances of precipitation of the three stations compr... |
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| Keywords: | Guangdong Province precipitation long-term trend extreme distribution periodic change |
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