[1]陈军,李小兰,喻义军,等.贵州一次暖区持续性区域大暴雨成因分析[J].气象研究与应用,2015,36(04):21-27.
　Chen Jun,Li Xiaolan,Yu Yijun,et al.Analysis of the Formation of a Warm Sector Torrential Rain Sustainedly Case in Guizhou Province[J].Journal of Meteorological Research and Application,2015,36(04):21-27.
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贵州一次暖区持续性区域大暴雨成因分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第36卷
期数:
2015年04期
页码:
21-27
栏目:
天气气候
出版日期:
2015-12-23

文章信息/Info

Title:
Analysis of the Formation of a Warm Sector Torrential Rain Sustainedly Case in Guizhou Province
作者:
陈军1;  李小兰2;  喻义军3;  滕林4
1. 贵州省铜仁市气象局, 贵州铜仁 554300;
2. 贵州省玉屏县气象局, 贵州玉屏 554000;
3. 贵州省印江县气象局, 贵州印江 555200;
4. 贵州省剑河县气象局, 贵州剑河 556400
Author(s):
Chen Jun1;  Li Xiaolan2;  Yu Yijun3;  Teng Lin4
1. Meteorology Bureau of Tongren, Guizhou Province, Tongren 554300;
2. Meteorology Bureau of Yuping, Guizhou Province, Yuping 554000;
3. Meteorology Bureau of Yinjiang, Guizhou Province, Yinjiang 555200;
4. Meteorology Bureau of Jianhe, Guizhou Province, Jianhe 556400
关键词:
暖区暴雨; 高湿高能; 地面辐合线
Keywords:
warm sector rain; high humidity and high energy; ground convergence line; train effect; spread backward
分类号:
p458.1+21.1
摘要:
利用NCEP 1°×1°再分析资料、自动站观测及雷达卫星资料等对2015年6月1日至3日发生在贵州的一次暖区持续性区域大暴雨天气成因进行分析,结果发现:低层高湿高能环境和上干下湿的大气层结有利于暖区降水效率的提高和强对流天气的产生;降水易发生在低空急流左侧和热低压东部第一象限和第四象限叠加区内,而强雷暴易发生在地面辐合线和850hPa切变线之间的热低压第一象限里;垂直速度和涡度剖面图说明了暖区上升气流的强盛发展及其倾斜性,副高西伸北抬的同时地面辐合线却有所南压,二者反位相进退有利于斜升气流的维持;雷达组合反射率因子表明低层风速风向的辐合触发局地对流单体不断发生发展,降水过程表现出明显的"列车效应",而回波剖面显示该暖区降水回波具有热带降水回波的特征;卫星云图显示对流云团发展成长条状,整个过程表现出对流云团发展具有后向传播的特点。
Abstract:
NCEP reanalysis data (horizontal resolution of 1 ° x 1 °), surface automatic stations data, radar observation and satellite data are used to analyze the causes of heavy rain on the warm region from June 1, 2015 to June 3, 2015 in Guizhou Province. The results shows that:high humidity environment and high energy on low-level atmosphere and dry up wet down atmosphere can improve warm sector precipitation efficiency and generate strong convective weather. Precipitation generate easily on the Superposition area between the left of LLJ and the east of thermal low pressure of the first quadrant and the fourth. strong thunderstorms generate in the first quadrant of the thermal low pressure that is between the ground convergence line and 850hPa shear line. Vertical velocity and vorticity sectional illustrate the strong development and tilt of the updrafts of warm sector, the westward extension northward lift of WPSH,while the ground convergence line is somewhat southward, both forward and backward of the anti-phase ramp are in favor of airflow maintaining. Radar composite reflectivity factor indicates that convergence of the low-level wind speed and direction trigger local development of convective, precipitation process shows significant "train effect", and radar echo Section shows precipitation has tropical precipitation echo features; satellite images show the convective clouds develop into strips, the whole process shows the characteristics which the convective clouds spread backward.

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备注/Memo

备注/Memo:
收稿日期:2015-06-25。
基金项目:黔气科合QN[2016]09号(铜仁冷式和暖式与变型暴雨环境特征及落区分析)
作者简介:陈军(1990-),男,本科,助理工程师,从事天气预报工作。
更新日期/Last Update: 1900-01-01