气象2025，Vol.51Issue(10)：1249-1260,12.DOI:10.7519/j.issn.1000-0526.2025.060901
京津冀地区风廓线雷达组网的对流触发信号判别
Discrimination of Convection Triggering Dignals from the Wind Profiler Radar Mesoscale Network in Beijing-Tianjin-Hebei Region
摘要
Abstract
In this study,we analyze the evolution of the dynamical field before the occurrence of convection by using the dynamical parameter profiles below 4 km inverted from the wind profile radar mesoscale network from April to September during 2023-2024.The results show that before the convection trigger-ing,the dynamical field is characterized by a vertical upward motion configuration with low-level conver-gence and high-level divergence.There exists the presence of positive time-lag correlations between area averaged rainfall and convergence in the lower to mid-troposphere.During the 30 min before precipitation,horizontal divergence is less than-5 × 10-5 s-1,with the convergence thickness below 1 km deepening,which means that the continuously enhanced convergence and upward motion favors the occurrence of con-vection.The horizontal convergence intensity sustained to be greater than 50×10-5s-1 in the 30 min prior to precipitation is used as an indicator for the early signal of convection triggering.Among 763 precipita-tion events,the accuracy rate of effective identification of precipitation events is 72.3％.These findings can provide an important reference for quantitatively analyzing the early warning of severe convection in Beijing-Tianjin-Hebei Region.关键词
风廓线雷达/对流触发/辐合上升/京津冀地区Key words
wind profile radar/convection triggering/convergence and upward motion/Beijing-Tianjin-Hebei Region分类
大气科学引用本文复制引用
杨荣芳,郭建平,孔凡超,孟德利,张震,郭晓冉,单昱峰,邓剑波..京津冀地区风廓线雷达组网的对流触发信号判别[J].气象,2025,51(10):1249-1260,12.基金项目
中国气象局大气探测重点开放实验室课题(2023KLAS02M)、中国气象局"揭榜挂帅"科技项目(CMAJBGS202307)和中国气象局雄安大气边界层重点开放实验室开放课题(2023LABL-B06)共同资助 （2023KLAS02M）
