大气科学2026，Vol.50Issue(3)：745-763,19.DOI:10.3878/j.issn.1006-9895.2511.24143
同一冷涡背景下两条飑线入渤海后强度变化不同的原因分析
Analysis of the Reasons for Intensity Change Differences of Two Squall Lines after Entering the Bohai Sea under the Same Cold Vortex Background
摘要
Abstract
Affected by the Northeast China Cold Vortex,two squall lines successively entered the Bohai Sea from the west coast on the night of 12 June 2022.The first squall line weakened rapidly after entering the sea,and the second squall line maintained its intensity and strengthened slightly.This study used ground automatic station observations,Doppler weather radar data,Tianjin Meteorological Tower data,ERA5 reanalysis data,RMAPS-NOW system analysis data,and other multisource data to compare and identify the possible causes of the different intensity changes of the two squall lines after entering the sea.The results indicate that the intensity difference between the two squall lines after entering the sea is a combined result of multiple factors.The stronger the storm structure of the squall line before entering the sea,the smaller the distance from the main body of the squall line to the gust front,which is more conducive to the maintenance of the squall line after entering the sea.The moist tongue extending from the ocean to the inland,the transition to the converging flow field on the front side,and the sustained strong environmental vertical wind shear,along with CAPE(convective available potential energy),provide favorable mesoscale environmental conditions for the second squall line to maintain its intensity.The ascending motions formed by the inflows on the front sides of the two squall lines and the outflows from the cold pools on their rear sides closely adhere to the main bodies of the lines,which is conducive to the continuous transportation of warm,moist airflow to the edges of the main bodies and subsequent lifting,allowing the CAPE to be fully released and promoting the vigorous upward development of the storm structures.In addition,the interactions between the intensities(propagation speeds)of the cold pools of the two squall lines and the lower-level environmental vertical wind shear as the lines enter the sea are identified as one of the important reasons for the differing intensity changes of the squall lines after entering the sea.An approximately equally enhanced cold pool intensity and an equally increased environmental vertical wind shear are conducive to the maintenance of squall lines.关键词
飑线入海/强度变化/垂直风切变/冷池Key words
Squall line entering the sea/Intensity change/Vertical wind shear/Cold pool分类
天文与地球科学引用本文复制引用
刘德昊,章丽娜,孙晓磊,东高红,刘瑞婷,胡田田..同一冷涡背景下两条飑线入渤海后强度变化不同的原因分析[J].大气科学,2026,50(3):745-763,19.基金项目
国家自然科学基金项目42375019,国家重点研发计划课题——对流性致灾强风短期潜势预报及0～24小时无缝隙预报业务集成项目2022YFC3004104,天津市气象局科研项目202408ybxm07,中国气象局—沈阳大气环境研究所联合开放基金课题2023SYIAEKFMS10,天津市海洋气象重点实验室开放基金项目2024TKLOM05 National Natural Science Foundation of China(Grant 42375019),National Key R&D Program Project:Short-term Potential Forecasting of Convective Disaster-Causing Strong Winds and Seamless Forecasting Business Integration for 0-24 Hours(Grant 2022YFC3004104),Tianjin Meteorological Bureau Research Project(Grant 202408ybxm07),Joint Open Project Fund of the Institute of Atmospheric Environment of Shenyang and China Meteorological Administration(Grant 2023SYIAEKFMS10),Open Project Fund of Tianjin Key Laboratory of Ocean Meteorology(Grant 2024TKLOM05) （Grant 42375019）
