气象2026，Vol.52Issue(7)：810-821,12.DOI:10.7519/j.issn.1000-0526.2026.051401
厦门地区一次阵风锋与海风锋碰撞触发强对流的数值模拟
Numerical Simulation of Severe Convection Triggered by the Collision Between Gust Front and Sea-Breeze Front in Xiamen
摘要
Abstract
Using conventional observations,surface automatic meteorological station data,NCEP/FNL re-analysis,Doppler radar data,and WRF model simulations,this paper studies a severe convective event triggered by the collision between a gust front and a sea-breeze front in the Xiamen Region,and also ana-lyzes its underlying mechanisms.The results show that this event occurred at the edge of the subtropical high,where upper-level divergence overlapped with low-level convergence.An unstable thermodynamic stratification characterized by dry upper levels and moist lower levels,together with strong thermal insta-bility,provided a favorable environment for convective development.The cold outflow generated by earlier convective cells expanded outward forming a gust front,while the sea-breeze front developed continuously along the Xiamen coast.After the two boundaries collided near the urban area of Xiamen,low-level con-vergence and local lifting were markedly enhanced,thereby initiating the severe convection.WRF simula-tions further indicate that following the collision,the shallow-layer specific humidity in the collision zone increased by about 2.5 g·kg-1,the maximum convective available potential energy increased by more than 1000 J·kg-1,and the vorticity intensified to 25× 10-4 s-1,which indicate significant enhancement of moisture supply,instability,and dynamic lifting.The convergence-induced ascending motion allowed air parcels to overcome the level of free convection,thereby initiating and sustaining convection.Subsequent-ly,convective cells near the collision zone merged and triggered a cloud-bridge cell,which further devel-oped into a multicellular merging process.Thereafter,a surface convergence line and shallow shear system on the rear side of the collision area maintained a deeper convergence-ascending structure,and with suffi-cient moisture and instability,a subsequent convective regeneration process occurred.The findings could provide a useful implication for nowcasting and warning of local severe convection in Xiamen and other coastal regions.关键词
阵风锋/海风锋/对流初生/短时强降水/数值模拟Key words
gust front/sea-breeze front/convective initiation/short-time heavy rainfall/numerical simula-tion分类
天文与地球科学引用本文复制引用
吴福浪,施思,秦婷,汪冬冬..厦门地区一次阵风锋与海风锋碰撞触发强对流的数值模拟[J].气象,2026,52(7):810-821,12.基金项目
宁波市重点研发计划暨"揭榜挂帅"项目(2023Z139)、浙江省"尖兵领雁+X"研发攻关计划项目(2024C03256)、宁波市公益性计划项目(2022S181和2023S065)、宁波市气象科技项目(NBQX2023004B)和浙江省自然科学基金项目(ZJMY25D050017)共同资助 （2023Z139）
