文献类型：期刊文献

中文题名：Sensitivity of Typhoon Lingling(2019)simulations to horizontal mixing length and planetary boundary layer parameterizations

作者：Siqi CHEN[1,2];Feng XU[1,2];Yu ZHANG[1,2,3];Guiling YE[1,2];Jianjun XU[1,2,3];Chunlei LIU[1,2,3]

机构：[1]College of Ocean and Meteorology,Guangdong Ocean University,Zhanjiang 524088,China;[2]South China Sea Institute of Marine Meteorology,Zhanjiang 524088,China;[3]Shenzhen Institute of Guangdong Ocean University,Shenzhen 518120,China

年份：2022

卷号：16

期号：2

起止页码：304

中文期刊名：Frontiers of Earth Science

外文期刊名：地球科学前沿（英文版）

收录：CSTPCD、、CSCD2021_2022、Scopus、CSCD、PubMed

基金：This study was jointly supported by the Guangdong Basic and Applied Basic Science Research Foundation(No.2019B1515-120018);a project of Enhancing School with Innovation of Guangdong Ocean University(No.230419053);projects(platforms)for Construction of Top-ranking Disciplines of Guangdong Ocean University(No.231419022);the Special Funds of Central Finance Support of the Development of Local Colleges and Universities(No.000041).

语种：英文

中文关键词：Hurricane Weather Research and Forecasting model;planetary boundary layer;western Pacific;typhoon;horizontal diffusion

中文摘要：Forecasting the intensity of typhoons is a difficult problem in numerical weather prediction.It is subject to many factors,among which the selection of physical parameterization schemes for the model is a hot topic of research.In this study,the effects of horizontal mixing length(represented by h_diff)and planetary boundary layer(PBL)schemes were investigated.Six idealized and four operational sensitivity experiments were designed based on simulation of the typhoon Lingling,which occurred over the western Pacific in 2019,using the Hurricane Weather Research and Forecasting model.The results of the idealized experiments showed that,as h_diff was increased,the slope of the typhoon eye area also increased,and its intensity became stronger.On the other hand,the results of the sensitivity experiments indicated that the intensity of the simulated typhoon was sensitive to the choice of PBL scheme,with the forecast bias of the QNSE(Quasi-Normal Scale Elimination)scheme being smaller than that of the GFDL(Geophysical Fluid Dynamics Laboratory)scheme.Angular momentum budget analyses indicated that,when increasing the h_diff,the convergence of angular momentum was larger in the boundary layer,which led to a faster spin-up of the vortex,further increasing the intensity of the typhoon.From the calculated horizontal and vertical vortex spread it was found that,when the h_diff was increased,the corresponding horizontal and vertical diffusion eddies also showed an increasing trend,which was also the reason for the strengthening of the typhoon.Meanwhile,the forecast bias decreased significantly with increasing horizontal mixing length when using the same PBL scheme.