热带气象学报2025，Vol.41Issue(1)：112-124,13.DOI:10.16032/j.issn.1004-4965.2025.012
渤海海峡下垫面对线性风暴强度的影响分析
Effects of the Underlying Surface on the Intensity of Linear Storms in the Bohai Strait
摘要
Abstract
Using observational data,radar data,and ERA5 reanalysis data,this study analyzed the impact of the underlying surface on the intensity of linear storms in the Bohai Strait through the analysis of two severe convective events with distinct evolutionary characteristics in 2021.The results show that both storm strengthening and weakening occurred under weak synoptic forcing,with low-level warm temperature ridge supporting potential instability stratification.Nocturnal thermal circulation and dynamic forcing dominated storm modulation through surface thermal heterogeneity,while daytime sea surface temperature(SST)gradients played secondary roles.Eastward-moving nocturnal linear storms typically weakened over the Bohai Strait cold-water region due to divergent flows.Storm enhancement occurred when ascent in the near-surface layer(induced by surface thermal contrasts)vertically aligned with environmental convergence.In this case,a relatively shallow mesoscale secondary circulation developed near the Bohai Strait,characterized by ascending motion in warm water areas and descending motion in cold water regions within the near-surface layer.Environmental convergence was often caused by outflows of other surrounding storms lifted by environmental wind convergence.Additionally,environmental easterly airflow and strong vertical wind shear at 0-1 km were conducive to maintaining the ascending motion of linear storm movement;sea breeze and coastline curvature also affected coastal convection.关键词
海陆风/海面温度/冷空气/中尺度次级环流/垂直风切变Key words
sea-land breeze/sea surface temperature/cold air/mesoscale secondary circulation/vertical wind shear分类
天文与地球科学引用本文复制引用
梅婵娟,侯淑梅,汤欢,万夫敬,赵海军..渤海海峡下垫面对线性风暴强度的影响分析[J].热带气象学报,2025,41(1):112-124,13.基金项目
国家重点研发计划(2022YFC3004104) （2022YFC3004104）
山东省自然科学基金项目(ZR2021MD010) （ZR2021MD010）
山东省气象局创新团队(SDCXTD2021-2、SDCXTD2023-1) （SDCXTD2021-2、SDCXTD2023-1）
山东省气象局科学技术研究项目(2022sdqxm12)共同资助 （2022sdqxm12）
