2023年6月1日辽宁省多龙卷风灾害调查及特征分析

Investigation and characteristic analysis of the multiple tornado disasters in Liaoning province on June 1,2023

选用现场灾害调查、视频资料、正射影像图和卫星图像等资料,分析2023年6月1日辽宁省阜新市、法库县、康平县、开原市发生的多龙卷风的强度、路径长度、外观特征及演变过程。结果表明:阜新市龙卷风为中等龙卷(EF1),路径约3 km,其漏斗云颜色变化反映了下垫面变化和龙卷风的演变过程;法库县出现双龙卷风,均为弱龙卷(EF0),路径长度分别为0.8 km和0.6 km;康平县龙卷风为弱龙卷(EF0),路径长度约1.0 km;开原市龙卷风为强龙卷(EF2),路径长度约11.0 km,卫星和正射影像图均有明显的龙卷灾害痕迹,并观测到近似圆形的摆线。此次辽宁省多龙卷风发生的雷达龙卷风产品仅对开原龙卷风报警,其他龙卷风无明显雷达特征。

Utilizing datasets of field disaster investigations,recorded videos,orthophoto maps,and satellite images,the study analyzed the intensity,path length,visual characteristics,and evolution of multiple tornadoes that occurred on June 1,2023,in Fuxin,Faku,Kangping,and Kaiyuan of Liaoning province.The results indicated that the tornado in Fuxin is a moderate tornado(EF1)with a path length of approximately 3 km.The color changes of the funnel cloud reflect variations in the underlying surface and the tornado evolution.The twin tornadoes in Faku are both classified as weak(EF0)with path lengths of 0.8 km and 0.6 km,respectively.The Kangping tornado is also weak(EF0)with a path length of about 1.0 km,whereas the tornado in Kaiyuan is strong(EF2)with a path length of approximately 11.0 km.Both satellite and orthophoto images show clear evidence of tornado damages,and a nearly circular cycloidal mark is observed.The tornado radar products in Liaoning province only issue an alert for the Kaiyuan tornado,while the other tornadoes are lack of clear signatures in radar products.