ON THE ASYMMETRIC CHARACTERISTICS OF TYPHOON "MANGKHUT" PRECIPITATION AND ITS INTERACTION WITH ENVIRONMENTAL FLOW FIELD
TANG Yining
YE Lei
LI Yubin
GAO Zhiqiu
Abstract：Based on satellite-observed precipitation data and reanalysis data,this paper identifies the asymmetric characteristics of Typhoon"Mangkhut"precipitation and its correlation with vertical wind shear,and further uses WRF for numerical simulation to explore the feedback effect of asymmetric precipitation induced internal dynamic process on environmental flow.The main conclusions are as follows:(1)The precipitation distribution of Typhoon"Mangkhut"shows obvious asymmetry.It is mainly concentrated in the south,while the average wind shear of the typhoon points to the southwest,and the precipitation is always on the left side of the downshear.(2)At the initial stage of typhoon development,the wind shear points to the direction of heavy precipitation,rotates counterclockwise and increases continuously.It reaches the maximum when turning to the south,and then decreases gradually.(3)The change of asymmetric precipitation location is accompanied by the change of asymmetric wind field,and it affects the change of asymmetric temperature and pressure field;the change of temperature and pressure field further changes the asymmetric wind and precipitation.Therefore,there is an interactive feedback between Typhoon"Mangkhut"and the environmental flow field.
Keywords：tropical cyclonevertical wind shearasymmetric precipitationnumerical simulationenvironmental flow field
Publication Date：2023-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 774-784 )