[1]谭德权,王晶晶,向钢,等.2014年盛夏湖南两次大暴雨过程的对比分析[J].气象研究与应用,2016,37(04):50-53.
　Tan De-quan,Wang Jing-jing,Xiang Gang,et al.Simulation Study of rainstorm and flood inundation in Longxu River Basin Based on the FloodArea Model[J].Journal of Meteorological Research and Application,2016,37(04):50-53.
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2014年盛夏湖南两次大暴雨过程的对比分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第37卷
期数:
2016年04期
页码:
50-53
栏目:
天气气候
出版日期:
2017-02-20

文章信息/Info

Title:
Simulation Study of rainstorm and flood inundation in Longxu River Basin Based on the FloodArea Model
作者:
谭德权;  王晶晶;  向钢;  吕校华;  杨志军
湖南省邵阳市气象局, 湖南邵阳 422000
Author(s):
Tan De-quan;  Wang Jing-jing;  Xiang Gang;  Lv Xiao-hua;  Yang Zhi-jun
Shaoyang Municipal Meteorological Service
关键词:
大暴雨; 大气环流背景; 水汽条件; 低空急流; 对比分析
Keywords:
torrential rain; atmospheric circulation; water vapor condition; low-level jet; comparative analysis
分类号:
P458.1+21.1
摘要:
利用NCEP1°×1°再分析资料、湖南省96个气象观测站降水资料,对2014年7月3-5日和11-17日分别出现的两次大暴雨过程从大气环流背景、水汽条件、低空急流配置等方面进行对比分析。结果表明:"7.3"暴雨是高空槽引导低涡切变东移引起的,雨强较强,但随着高空低槽东移降水快速结束;而"7.11"暴雨发生在副高边缘,由于副高一直维持在湖南上空,导致降水维持了很长一段时间。从水汽条件看,两次暴雨发生前期湖南高空都为高湿状态,最大比湿都在14g.kg-1以上,比湿大值中心都位于湘西,达到18g.kg-1;不同的是"7.03"暴雨的水汽通道有两支,一支来源于南海,一支来源于孟加拉湾,其水汽通量散度中心强度达到-6×10-6g.cm-2.hPa.s-1,与"7.3"相比,"7.11"暴雨水汽主要来源于南海,水汽通量散度中心强度比前次弱,为-4×10-6g.cm-2.hPa.s-1。低空急流的存在也是暴雨维持的重要条件,"7.11"暴雨的低空急流经过减弱消失再生成过程,降水也随之减弱消失再发生。低空急流的长时间维持,使得"7.11"暴雨比"7.03"暴雨的持续时间长。
Abstract:
Based on the NCEP1°×1°reanalysis data and precipitation data of 96 meteorological stations of Hunan province, two torrential rain processes during July 3-5 and 11-17, 2014 were analyzed respectively from atmospheric circulation background, moisture condition, low level jet configuration, etc.Results show that the "7.3" heavy rain is caused by upper trough leading low vortex shear shift with the stronger raining intensity, but the process ended very quickly with the high altitude low trough eastward; by contrast, the "7.11" heavy rain occurred on the edge of the subtropical high, and due to the maintained subtropical high over Hunan led to a very long period of precipitation. From water vapor condition, the first stages of two rainstorm is high humidity condition in high altitude of Hunan, with maximum specific humidity above 14 g kg-1, and the humidity value centers located in Xiangxi is up to 18 g kg-1; There are two water vapor channel of "7.03" heavy rain, one from the south China sea, the other from the bay of Bengal,the water vapor flux divergence center strength reach -6×10-6g.cm-2.h Pa.s-1,compared with ‘7.3’, ‘7.11’ storm water vapor mainly comes from the south China sea, the water vapor flux divergence center intensity is weaker than the previous, for -4×10-6g.cm-2.h Pa.s-1.The existence of the lowlevel jet are also the important condition of maintenance, "7.11" of the low level jet disappeared after weakening generating process, precipitation also weakens disappear again. Low-level jet for a long time to maintain, making the "7.11" heavy rain is longer than the duration of the "7.03" heavy rain.

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备注/Memo

备注/Memo:
收稿日期:2016-08-12。
作者简介:谭德权,天气与气候工程师,主要从事短期天气预报与短时临近预警研究工作。
更新日期/Last Update: 1900-01-01