|
|
Analysis of heavy rain in Lushan caused by the typhoon low pressure of Rumbia |
Yang Chao, Xu Jieling |
Jiujiang Meteorological Bureau,Jiujiang 332000 |
|
|
Abstract Based on conventional meteorological observation data,ERA5 0.25°×0.25° reanalysis data,encryption data of automatic weather station,high-precision DEM data and radar data,this paper analyzes the causes and characteristics of two heavy rainstorm processes caused by typhoon "Rumbia" in Lushan area in 2018.The results show that:1) before the typhoon landed,the short-term strong convection weather appeared in Lushan due to the influence of the typhoon.The terrain uplift of the windward slope did not cause strong precipitation in this area,while the leeward slope strengthened the convective system due to the cooperation of the friction turbulence of Lushan Mountain and the amplitude of the downhill airflow,forming a medium γ-scale convective system.The strong short-time heavy rainfall occurred in the places where the system passed.2)After the landfall,under the influence of typhoon low-pressure shear,continuous and strong precipitation appeared under the action of topographic uplift in Lushan Mountain.The precipitation was stable from the windward slope to the top of the mountain,and the increase of precipitation in Lushan Mountain terrain was very obvious.Under the influence of typhoon,the meso-γ scale system corresponding to the upwind area of Lushan leeward slope is the main cause of short-term heavy precipitation in Lushan leeward slope,which can be used as an important index in the short-term and imminent forecast of typhoon precipitation.
|
Received: 29 July 2022
|
|
|
|
|
[1] |
董克勤,张婉佩.对流层中低空急流影响下辐合带扰动的发展——7504号台风的形成[J].大气科学,1979(1):43-49.
|
[2] |
郭达烽,周芳,陈翔翔,等.登陆台风“麦德姆”的空心结构及其特征[J].气象与环境学报,2017,33(3):10-20.
|
[3] |
徐洁玲,杨超.台风“苏迪罗”影响下赣北暴雨成因分析[J].江西科学,2017,35(3):382-388.
|
[4] |
陈淑琴,李英,范悦敏,等.台风“山竹”(2018)远距离暴雨的成因分析[J].大气科学,2021,45(3):573-587.
|
[5] |
陈涛,董林,罗玲,等.台风利奇马登陆期间的对流结构特征及对强降雨影响[J].气象,2021,47(12):1433-1443.
|
[6] |
井喜,贺文彬,毕旭,等.远距离台风影响陕北突发性暴雨成因分析[J].应用气象学报,2005(5):655-662.
|
[7] |
单磊,谭桂容,姚叶青,等.一次台风远距离暴雨水汽条件及输送过程研究[J].热带气象学报,2014,30(2):353-360.
|
[8] |
郑婧,许彬,许爱华.远距离台风“康森”与高空西北气流共同作用对大暴雨的影响[J].暴雨灾害,2017,36(4):329-338.
|
[9] |
张娟娟,许爱华,陈云辉.一次远距离台风影响下的对流性暴雨分析[J].暴雨灾害,2015,34(4):335-342.
|
[10] |
尹洁,金米娜,冯开明,等.三个进入江西的台风路径和暴雨形成机制对比分析[J].气象与减灾研究,2007(2):18-22.
|
[11] |
马晓琳,马中元,黄水林,等.庐山夏季强降水与台风活动关系分析[J].暴雨灾害,2011,30(2):177-181.
|
[12] |
肖云,黄绍文,马中元.庐山夏季台风暴雨物理量分析[J].陕西气象,2014(5):7-13.
|
[13] |
叶小峰,马中元,马晓琳,等.庐山台风暴雨环境背景与云型特征分析[J].自然灾害学报,2012,21(5):159-166.
|
[14] |
Ying M,Zhang W,Yu H ,et al.An overview of the China meteorological administration tropical cyclone database[J].Journal of Atmospheric & Oceanic Technology,2014,31(2):287-301.
|
|
|
|