气象与环境学报2026，Vol.42Issue(1)：55-65,11.DOI:10.3969/j.issn.1673-503X.2026.01.006
辽宁两次副热带高压外围暴雨特征及成因对比分析
Comparative analysis on characteristics and causes of two rainstorm of peripheral subtropical high in Liaoning Province
摘要
Abstract
Based on conventional meteorological observation data,ERA5 reanalysis data,TBB data and radar data,the characteristics and causes of two rainstorm processes in Liaoning on July 6(process 1)and July 28(process 2)in 2022 are compared and analyzed.The results show that the high-altitude trough at the bottom of the cold vor-tex,subtropical high pressure and the surface cyclone are the main affect system of two processes.Process 1 exhib-its dual rain band characteristics,while the main rain band in Process 2 is located in western Liaoning.The high-al-titude trough guides cold air southward and produces frontal precipitation,which is the main cause of Western-Lia-oning rain belts.In Process 1,the southern trough of the subtropical high quickly passes through,and the coupling of high and low level jets provides strong lifting motion.The vertical velocity at 700 hPa reaches －9 Pa·s－1,and the low level jet transports water vapor,the water vapor flux at 850 hPa reaches 33 g·cm－1·hPa－1·s－1,resulting in a narrow but strong rainfall belt in western Liaoning.The Liaodong rainfall belt is the result of the joint action of the warm zone and the front,with high energy and high humidity at the top of the cyclone trough,at 850 hPa θse reaches 354 K,after the front zone moves eastward,a strong water vapor convergence zone is formed on the left side of the low-level jet exit zone.In process 2,the low-level jet is weak,and there is no strong divergence field in the high altitude,the water vapor transport and uplift conditions are not good.However,the eastern obstruction situ-ation causes the high altitude trough oscillating in western Liaoning for a long time,resulting in a large but weak range of the main rain belt.In process 1,secondary circulation is formed on the windward slope in front of the mountain.In process 2,the low level mountain front still maintains a certain upward movement,under the condition of weak divergence field at the upper level and the weak water vapor condition,causing rainstorm points in the are-a,indicating that the terrain in front of the mountain has a role in supporting the upward movement.关键词
暴雨/副热带高压/低空急流Key words
Subtropical high/Rainstorm/Low-level jet分类
天文与地球科学引用本文复制引用
徐庆喆,金巍,高清源,韩艳凤,田璐,战莘晔..辽宁两次副热带高压外围暴雨特征及成因对比分析[J].气象与环境学报,2026,42(1):55-65,11.基金项目
辽宁省科学技术项目(ZD202515)、国家重点研发计划(2022YFC3003900)、辽宁省气象局人才计划科技活动资助项目(RC202201)、2022年空间天气学国家重点实验室开放课题、2024年太阳活动与空间天气全国重点实验室专项基金资助项目和辽宁省气象局关键技术项目(LNGJ201901)共同资助. （ZD202515）
