LMI Lightning Observation Characteristics in Different Evolution Stages of a TS Type Linear Convection
Using FY-4A lightning imager(LMI)data,radar combined reflectivity factor data,ground-based Active Directory Topolopy Diagrammer(ADTD)lightning location data,FY-4A cloud top brightness temperature(TBB)data and other conventional observation data,the reliability and observation characteristics of LMI lightning data in three different evolution stages of a trailing stratiform(TS)linear convection in Hubei province in 2019 were analyzed.The results show that LMI lightning observation has a certain degree of space-time continuity in different evolution stages of linear convection,and the distribution of LMI lightning is generally consistent with that of ADTD lightning;In the stage of convection development,LMI lightning observation is mostly located in the front of the TS type linear convection leading convective line,which is ahead of the convective line,indicating the convection development in the next 0-1 hours in advance;In the mature stage of convection,LMI lightning observation is often close to leading convection line,which is significant for monitoring the development of linear convection;In the stage of convection weakening,a part of LMI lightning is located in the weakened leading convective line,and the other part is located in the stratiform mixed cloud area behind the linear convection.Finally,the model graph of LMI lightning observation characteristics in different evolution stages of TS linear process were given,which provides some reference for the application of LMI lightning products in convective weather monitoring and early warning.
lightning mapping imagerlinear convectionmonitoring and warning