气象科学2024，Vol.44Issue(6)：1016-1026,11.DOI:10.12306/2023jms.0002
一次飑线演变为区域持续性特大暴雨过程的模拟分析
Simulation analysis of a process evolving form a squall line to a regional persistent heavy rain
摘要
Abstract
The numerical simulation and diagnostic analysis of a regional persistent heavy rain process evolving form a squall line in Shandong Province on August 13-14,2020 show that:(1)the outflow of cold pool formed by the previous precipitation meets the southwest warm and humid airflow,triggering the northeast-southwest squall line system.(2)The movement speed of the large-scale system determines the nature of the precipitation system.In 13,the cold vortex system moved eastward faster,and the formed squall line continuously moved from the northwest to the southeast in Shandong,while in 14,the cold vortex system moved eastward slowly,and the subtropical high ridge remained stable around 32° N,and the relatively stable large-scale environment led to the occurrence of regional persistent precipitation.(3)The invasion of dry and cold air makes the convective cells in the squall line develop strong along the interface between dry intrusion and low-level warm and wet air flow,and move to southeast with the dry intrusion moving southward.The change of the relative position of dry intrusion and southwest warm and wet airflow makes the rainstorm process evolve from the squall line to regional persistent precipitation,and the stable of dry intrusion enables the persistent precipitation in southern Shandong to be maintained for a long time.(4)The repeated reconstruction of the convective environment is the mesoscale influencing factor for the occurrence of the regional persistent heavy rain.关键词
飑线/冷池/区域持续性暴雨/低空急流/干侵入Key words
squall line/cold pool/regional persistent rainstorm/low-level jet stream/dry invasion分类
天文与地球科学引用本文复制引用
肖明静,吴炜,范苏丹,曲巧娜,荣艳敏..一次飑线演变为区域持续性特大暴雨过程的模拟分析[J].气象科学,2024,44(6):1016-1026,11.基金项目
山东省自然科学基金面上资助项目(ZR2022MD40) （ZR2022MD40）
中国气象局创新发展专项(CXFZ2023J084) （CXFZ2023J084）
山东省气象局科技基金面上资助项目(2022sdqxm04) （2022sdqxm04）
环渤海区域科技协同创新基金资助项目(QYXM202007 （）
QYXM202202 （）
QYXM202202) （）
山东台风与海洋气象创新团队(SDCXTD2021-2) （SDCXTD2021-2）
