气象2025，Vol.51Issue(9)：1061-1071,11.DOI:10.7519/j.issn.1000-0526.2025.031001
渤海湾飑线入海增强机制的个例研究
A Case Study on the Enhancement Mechanism of Squall Lines Moving into the Bohai Bay
摘要
Abstract
Based on conventional observation data,Doppler weather radar data and ERA5 reanalysis data,the physical process responsible for the enhancement and maintenance of a strong squall line affecting the Bohai Sea Area during the night of 31 July 2021 is analyzed.The results show that coastal terrain and sea surface temperature were the key factors for the intensity of squall lines.The warm water areas in the cen-tral and western Bohai Sea had favourable conditions for thermodynamic instability,and the areas with high wind speeds corresponded to the areas with high sea surface temperatures.The thermodynamic instability around Bohai Bay was the strongest,and the horn-shaped coastal terrain around Bohai Bay ex-hibited"the effect of funnelling",resulting in significant wind field convergence on the windward side of the coast.This was conducive to triggering coastal convection.In the early stages,the cold pool outflow formed by multi-cell storms on land converged with environmental airflow,causing the storms to propa-gate eastward and move into the Bohai Bay.The uneven onshore wind caused by the complex coastal to-pography in the northern Bohai Bay was helpful for the rebirth of scattered thunderstorm cells along the coast,and the repeated incorporation of scattered thunderstorm cell made the onshore multi-cell storm con-tinue to strengthen,forming a squall line.The herringbone squall line formed after entering the sea,ac-companied by the merging of cold pools,and at the same time,a mesoscale vortex strengthened the squall line near the northern coastline of Bohai Bay.In the process of squall line strengthening at sea,the bound-ary layer frontogenesis associated with the warm water area and the cold pool played a critical role,finally making the squall line develop and strengthen in the warm water area of Bohai Sea but weaken and dissi-pate in the cold water area.关键词
飑线/海岸地形/海表温度/锋生Key words
squall line/coastal terrain/sea surface temperature/frontogenesis分类
天文与地球科学引用本文复制引用
梅婵娟,王秀明,李蕊,万夫敬,张莉萍..渤海湾飑线入海增强机制的个例研究[J].气象,2025,51(9):1061-1071,11.基金项目
国家重点研发计划(2022YFC3004104)、山东省自然科学基金项目(ZR2021MD010)、山东省气象局创新团队(SDCXTD2023-1、SDCXTD2021-2)、山东省气象局重点科研项目(2022sdqxz02、2022sdqxz11)和山东省气象局科学技术研究项目(2022sdqxm12、2024sdqxm15)共同资助 （2022YFC3004104）
