| 广西秋冬季旱涝的时空分布特征及同期环流分析 |
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| 引用本文： | 唐伍斌.广西秋冬季旱涝的时空分布特征及同期环流分析[J].气象,2009,35(1):108-113. |
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| 作者姓名： | 唐伍斌 |
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| 作者单位： | 广西桂林市气象局,541001 |
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| 摘 要： | 利用广西88个站点1961--2006年的逐月降水资料,采用Z指数定义方法.对秋季和冬季进行旱涝等级划分.采用EOF分解对旱涝等级场展开分解,得出广西秋季和冬季的旱涝时空分布和年际变化特征,分析结果表明:全区性偏涝或偏旱是秋冬季旱涝分布的主要型态;各季时间系数出现极大或极小值的年份与广西发生干旱或洪涝的年份有着很好的对应关系;秋季时间系数在近几年为正值,振幅较大,说明近年来广西秋季旱情明显.对旱涝同期的500hPa环流进行了分析,结果表明:500hPa高度场上,秋季涝年在乌拉尔山东面的槽明显比旱年深,南海高压偏强,副高较弱;冬季涝年为北高南低的形势,冷空气路径偏南,青藏高原上位势高度低,不断有小槽东移影响广西.
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| 关 键 词： | Z指数 旱涝等级 时空分布特征 环流分析 |
| 收稿时间： | 6/2/2008 12:00:00 AM |
| 修稿时间： | 2008/10/13 0:00:00 |
Analysis of Spatial-Temporal Characteristics of Flood/Drought and Circulation Characteristics in Winter and Autumn in Guangxi |
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| Tang Wubin.Analysis of Spatial-Temporal Characteristics of Flood/Drought and Circulation Characteristics in Winter and Autumn in Guangxi[J].Meteorological Monthly,2009,35(1):108-113. |
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| Authors: | Tang Wubin |
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| Institution: | Guilin Meteorological Office;Guansxi Zhuang Autonomous Region 541001 |
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| Abstract: | Based on the monthly precipitation data of 88 observing stations in Guangxi from 1961 to 2006,drought and flood grades in winter and autumn are divided with the method of Z index, and the annual change and spatial-temporal characteristics are obtained with EOF.The results show that the overall dry in Guangxi is the main type.There exists a positive correlation between the frequency of flood and drought and the time coefficient.The circulation characteristic at 500 hPa in the same season is analyzed.The resu... |
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| Keywords: | Z index drought and flood grades spatial-temporal characteristics circulation analysis |
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