摘要
利用欧洲中心新一代再分析资料(ERA5)和常规气象观测资料,从水汽条件对2019年超强台风“玲玲”引发江苏大暴雨过程进行诊断分析。结果表明:(1)高空槽引导冷空气入侵台风外围环流是形成此次大暴雨的重要原因;(2)江苏东南部的低层水汽通量和水汽通量散度异常偏大,对应有充足的水汽供应和较强的水汽辐合;(3)850hPa、925hPa水汽通量散度及水汽通量的大值区与暴雨落区有较好的对应关系。
Using the new generation ERA reanalysis data(ERA5)and conventional observation data,the heavy rainstorm process in Jiangsu Province caused by super typhoon"Lingling"of 2019 is diagnosed from the water vapor condition.The results are as follows:(1)The significant reason of the heavy rainstorm is that the cold air invades the circulation around the typhoon under the guidance of upper trough.(2)The water vapor flux and flux divergence of lower layer in the southeast of Jiangsu Province are abnormally large,which correspond to the sufficient water vapor supply and strong water vapor convergence.(3)The large-value area of water vapor flux divergence and vapor flux at 850hPa and 925hPa is consistent with the actual heavy rainstorm region.
作者
陆伟
倪艳
LU Wei;NI Yan(Taizhou Meteorological Bureau of Jiangsu Province,Taizhou,Jiangsu Province,225300 China;Jiangsu Early Warning Center,Nanjing,Jiangsu Province,210008 China)
出处
《科技创新导报》
2020年第21期130-134,共5页
Science and Technology Innovation Herald
关键词
台风
大暴雨
水汽通量
水汽通量散度
Typhoon
Heavy rainstorm
Water vapor flux
Water vapor flux divergence
