气象学报2025，Vol.83Issue(5)：1258-1270,13.DOI:10.11676/qxxb2025.20240051
边界层涡动输送对郑州"7.20"特大暴雨的影响分析
Impact of PBL eddy transport on the 20 July 2021 Zhengzhou torrential rainfall
摘要
Abstract
The"7.20"Zhengzhou torrential rainfall is the most severe storm in the 21st century,characterized by long persistence and intense hourly precipitation.Through comparative analysis of PBL(Planetary Boundary Layer)eddy transport for this instantaneous precipitation process,this study attempts to investigate PBL structure and turbulent diffusion impacts on heavy precipitation intensity.Three comparative experiments are conducted by tuning coefficients of local eddy diffusion and counter-gradient term.Results show that PBL turbulent transport has strong influences on severe hourly precipitation during the"7.20"Zhengzhou torrential rainfall event.It is found through comparison that the decrease in local eddy diffusion noticeably leads to weakening in precipitation intensity and the counter-gradient term mainly results in changes in rainfall location and evolution.Furthermore,PBL eddy transport can modulate large-scale atmospheric conditions for heavy storms,such as local water vapor supply and atmospheric instability.Finally,the eddy vapor and heat transports can notably modify the distribution,intensity and evolution of moisture flux convergence and PBL atmospheric instability,and thus exhibit great influences on this severe storm simulation.关键词
边界层涡动传输/郑州暴雨/降水强度/数值模拟/AREM模式Key words
PBL turbulent transport/Zhengzhou torrential rainfall/Precipitation intensity/Numerical simulation/AREM model分类
大气科学引用本文复制引用
叶成志,程锐,戴泽军,王洋,陈静静,吴珍珍..边界层涡动输送对郑州"7.20"特大暴雨的影响分析[J].气象学报,2025,83(5):1258-1270,13.基金项目
湖南省自然科学基金重大项目(2021JC0009)、中澳双边气象科技合作国际项目(JW-16-4.1)、湖南省气象局重点项目(XQKJ16A001、XQKJ17D001). （2021JC0009）
