[1]庞传伟,蒋荣群,李向红,等.基于尺度分离的桂东北一次极端暴雨成因分析[J].气象研究与应用,2023,44(01):64-69.[doi:10.19849/j.cnki.CN45-1356/P.2023.1.11]
　Pang Chuanwei,Jiang Rongqun,Li Xianghong,et al.Analysis of the causes of an extreme rainstorm in northeastern Guangxi based on scale decomposition[J].Journal of Meteorological Research and Application,2023,44(01):64-69.[doi:10.19849/j.cnki.CN45-1356/P.2023.1.11]
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基于尺度分离的桂东北一次极端暴雨成因分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第44卷
期数:
2023年01期
页码:
64-69
栏目:
龙舟水专刊
出版日期:
2023-03-15

文章信息/Info

Title:
Analysis of the causes of an extreme rainstorm in northeastern Guangxi based on scale decomposition
作者:
庞传伟1;  蒋荣群2;  李向红3;  侯进4;  周希源3;  苏圣华5
1. 恭城县气象局, 广西 恭城 542500;
2. 钟山县气象局, 广西 钟山 542600;
3. 桂林市气象局, 广西 桂林 541001;
4. 阳朔县气象局, 广西 阳朔 541900;
5. 临桂区气象局, 广西 桂林 541100
Author(s):
Pang Chuanwei1;  Jiang Rongqun2;  Li Xianghong3;  Hou Jin4;  Zhou Xiyuan3;  Su Shenghua5
1. Gongcheng County Meteorological Bureau, Guangxi Gongcheng 542500, China;
2. Zhongshan County Meteorological Bureau, Guangxi Zhongshan 542600, China;
3. Guilin Meteorological Bureau, Guangxi Guilin 541001, China;
4. Yangshuo County Meteorologic
关键词:
极端暴雨; 静止锋; MCC; 扰动辐合线
Keywords:
extreme rainstorms; stationary fronts; MCC; disturbed convergence lines
分类号:
P458.1+21.1
DOI:
10.19849/j.cnki.CN45-1356/P.2023.1.11
摘要:
利用广西降水数据、卫星TBB数据和ERA5再分析资料,基于大气变量物理分解原理,从全球大气分析场中分离出天气尺度扰动场,对2022年6月17-21日桂东北极端暴雨过程进行了多角度分析。结果表明,此次过程发生在充足的水汽供应和有利去稳环境条件下,存在多种不同尺度的上升运动;长时间维持在25°N附近的准静止锋是主要的抬升机制和连续暴雨的主要原因,其南北摆动对应着暴雨带的南北移动,暴雨的强弱变化和锋生扰动一致;造成20日极端短时暴雨的MCC,由锋区内925 hPa和850 hPa气流辐合线所触发和维持;扰动辐合线能很好地指示出降雨中心,暴雨落区位于925 hPa和850 hPa扰动辐合线之间。
Abstract:
Using the precipitation data of Guangxi, satellite TBB data and ERA5 reanalysis data, based on the principle of physical decomposition of atmospheric variables, the synoptic scale disturbance field was separated from the global atmospheric analysis field, and the extreme rainstorm process in northeast Guangxi during 17-21 June 2022 was analyzed from multiple angles. The results show that:This process occurred under the conditions of sufficient water vapor supply and favorable de-stabilizing environment, and there were various ascending motions at different scales. The stationary front which maintained near 25°N for a long time was the main cause of the continuous rainstorm and the main lefting mechanism. Its north-south swing corresponded to the north-south movement of the rainstorm belt, and the variation of the intensity of the rainstorm was consistent with the frontogenesis disturbance.The system responsible for the extreme short-duration rainstorm on June 20, 2022 was the MCC, which was triggered and maintained by the convergence line of the 925hPa and 850hPa airflow in the front area. Disturbance convergence lines can indicate the center of rainfall well, the rainstorm falling zone is located between the 925 hPa and 850 hPa disturbance convergence lines.

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备注/Memo

备注/Memo:
收稿日期:2022-11-25。
基金项目:广西气象科技开发重点项目(桂气科2022Z01、桂气科2023M19)
作者简介:庞传伟(1986-),工程师,主要从事中短期天气预报与研究。E-mail:373851358@qq.com
通讯作者:李向红(1966-),正研级高级工程师,主要从事暴雨形成机理研究与预报。E-mail:gllxh99@163.com
更新日期/Last Update: 1900-01-01