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广西暴雨时空分布特征
引用本文:黄明策.广西暴雨时空分布特征[J].广西气象,2006,27(3):9-13.
作者姓名:黄明策
作者单位:中山大学环境科学与工程学院大气科学系,广东广州510275
摘    要:利用1970-2004年广西89个测站逐12h降水实测资料,分析了广西暴雨的时空分布特征。结果表明:广西年均暴雨量的分布具有明显的地域性,暴雨中心区主要位于山脉的迎风坡,地形的强迫作用对暴雨有增幅效应。年均暴雨日数的地域分布与年均暴雨量的分布相一致,但不同的季节年均暴雨日数其地域分布有明显差异。暴雨的日变化具有桂西北夜间暴雨濒数较白昼高,而桂东南则相反的分布特点。广西暴雨过程持续时间一般为1~2d,约占94%,3d以上的强过程只在5~8月份出现。

关 键 词:暴雨  时空分布  日变化  特征
文章编号:1001-5191(2006)03-0009-05
收稿时间:2006-02-21
修稿时间:2006-02-21

Rainstorm Space and Time Distributed Characteristic in Guangxi
HUANG Ming-ce.Rainstorm Space and Time Distributed Characteristic in Guangxi[J].Journal of Guangxi Meteorology,2006,27(3):9-13.
Authors:HUANG Ming-ce
Affiliation:Atmospheric Department of Environmental science and Engineering college of Zhongshan University, Guangzhou 510275
Abstract:This paper analyzes the rainstorm space and time distributed characteristic of Guangxi by means of the 12h precipitation data of 89 stations in Guangxi during 1970-2004. The result indicates that the distribution of yearly average rainfall of the rainstorm presents the obvious regional characteristic. The central area of the rainstorm is mainly located in the mountain slope against the wind, The force function of the terrain makes the effect to increase the rainfall. The region distribution of the yearly average rainstorm days is consistent with the distribution of yearly average rainfall, but it presents the obvious difference in different seasons. The daily change of the rainstorm shows that the frequency of the rainstorm in northwest at night time is higher than that in daytime, but it presents the opposite characteristic in the southeast of Guangxi. The duration of rainstorm process is genearlly for 1-2d which accounts for about 94 %. The strong processes above 3d only appear from May to August.
Keywords:Rainstorm  Space and time distribution  Daily change  Characteristic
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