气象科学2026，Vol.46Issue(3)：259-271,13.DOI:10.12306/2025jms.0029
边界层廓线形状指数对一次江淮暴雨的模拟影响分析
Impact of boundary layer profile shape parameter on the simulation of a Jianghuai heavy rainfall event
摘要
Abstract
Based on the WRF model and using a Jianghuai heavy rainfall event in 2022 as a case study,this study analyzed the impact of the boundary layer profile shape parameter(p)in the YSU boundary layer scheme on the precipitation simulation.Results show that the precipitation bias and TS scores differ significantly among the five simulation experiments with different p values(p=1.333,1.667,2.000,2.333,2.667).Reults show that TS,BIAS scores,correlation coefficients,and error analysis perform optimally overall at p=2.333.During the initial simulation stage,wind,temperature,and moisture exhibit clear linear relationships with p values:in the upper boundary layer,larger p values correspond to weaker vertical mixing,stronger wind speeds,higher temperatures,and lower specific humidity,while the opposite occurs in the lower boundary layer.During precipitation stage,the smaller the p value,the more homogeneous the mixing within the boundary layer,and the smaller the wind shear and vertical velocity,which is not conducive to the rise of water vapor and the development of convective activities.Compared with the plains,the mountainous underlying surface is more affected by the p value.关键词
大气边界层/廓线形状指数/边界层方案/数值模拟/江淮暴雨Key words
atmospheric boundary layer/profile shape parameter/boundary layer schemes/numerical simulation/Jianghuai heavy rainfall分类
天文与地球科学引用本文复制引用
贾未雨,荆弈,邓子怡,李煜斌,高志球..边界层廓线形状指数对一次江淮暴雨的模拟影响分析[J].气象科学,2026,46(3):259-271,13.基金项目
国家重点研发计划资助项目(2023YFC3706303) （2023YFC3706303）
