| 2009年广东省汛期降水空间分布不均的气候成因 |
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| 引用本文： | 胡娅敏,罗晓玲,陈新光.2009年广东省汛期降水空间分布不均的气候成因[J].广东气象,2010,32(2):4-7. |
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| 作者姓名： | 胡娅敏 罗晓玲 陈新光 |
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| 作者单位： | 广东省气候中心,广东广州,510080 |
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| 摘 要： | 2009年广东省汛期(4～9月)降水呈现出空间分布不一致性,采用统计方法分析引起这种现象的成因:直接原因是大气环流异常导致了季风爆发偏晚和冷空气偏弱,从而前汛期降水大部分地区偏少;而后汛期期间西太平洋副热带高压偏西偏强,导致热带气旋主要登陆及影响珠江口和粤西地区,从而后汛期降水雨带主要位于粤西南。因而,2009年汛期多种环流因素的共同作用,导致了珠江口及其以西降水偏多,其余地区降水偏少。
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| 关 键 词： | 气候学 汛期降水 空间分布 气候成因 广东 |
The Possible Climate Cause of the Spatial Inhomogeneity for Precipitation during 2009 Rainy Season in Guangdong |
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| HU Ya-min,LUO Xiao-ling,CHEN Xin-guang.The Possible Climate Cause of the Spatial Inhomogeneity for Precipitation during 2009 Rainy Season in Guangdong[J].Journal of Guangdong Meteorology,2010,32(2):4-7. |
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| Authors: | HU Ya-min LUO Xiao-ling CHEN Xin-guang |
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| Institution: | HU Ya - min, LUO Xiao - ling, CHEN Xin - guang ( Guangdong Climate Center, Guangzhou 510080, China) |
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| Abstract: | According to the precipitation data from April to September 2009 in Guangdong, a spatial inhomogeneity distri- bution of rainfall during 2009 rainy season is found. Further analysis reveals that the atmospheric circulation anomaly was the di- rect cause, which led to the later onset of monsoon, the weaker cold surge, and hence less precipitation for the first rainy sea- son in most of Guangdong. In the second rainy season, the tropical cyclones mainly made landfall on the Pearl River Delta Estu- ary and the West Guangdong because of the more westward location and the stronger intensity of the West Pacific Subtropical high, which resulted in richer rain in the southwest of Guangdong. Consequently, for the whole rainy season of 2009, multiple factors in general circulation contributed to the richer rainfall in the Pearl River delta region and the West Guangdong and poo- rer counterparts in the other regions. |
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| Keywords: | Climatology precipitation during the rainy season spatial distribution climate cause Guangdong |
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