Using meteorological observation data,Doppler radar,and NCEP 0.25°×0.25°of 6 h reanalysis data,comparative analysis of circulation background,trigger conditions,physical quantity characteristics,and rad...Using meteorological observation data,Doppler radar,and NCEP 0.25°×0.25°of 6 h reanalysis data,comparative analysis of circulation background,trigger conditions,physical quantity characteristics,and radar image characteristics of two severe convection weather processes in Shunde District during May 10-11,2020 was conducted,and similarities and differences of severe convection processes were explored.The results showed that the two severe convection processes occurred in the situation that there lacked high-altitude trough moving eastward,but low altitude was accompanied by shear line,which was triggered under conditional thermal instability.Vertical velocity profile displayed that severe convection was accompanied by strong convergence and upward movement,and K index and water vapor flux divergence had good corresponding relationship with the occurrence and extinction of severe convection weather in time.The occurrence of strong wind area had certain indicative significance for the prediction of severe convection weather.展开更多
Lightning interception technology is one of the three core technical systems of regional lightning protection theory.Among them,the omni-directional multi-pulse lightning interceptor(hereinafter referred to as lightni...Lightning interception technology is one of the three core technical systems of regional lightning protection theory.Among them,the omni-directional multi-pulse lightning interceptor(hereinafter referred to as lightning interceptor,the same below)has the ability to attenuate lightning current≥40%and significantly reduce the intensity of the spatial electromagnetic field around the lightning point.In order to explore the attenuation mechanism and effect of lightning interceptor to lightning current,this paper analyzed a lightning stroke process at 16:00 on August 19,2022,and tried to explain the attenuation effect of lightning interceptor to lightning current with the physical parameters of lightning stroke.展开更多
基金Supported by Science and Technology Research Project of Foshan Meteorological Bureau(201912)。
文摘Using meteorological observation data,Doppler radar,and NCEP 0.25°×0.25°of 6 h reanalysis data,comparative analysis of circulation background,trigger conditions,physical quantity characteristics,and radar image characteristics of two severe convection weather processes in Shunde District during May 10-11,2020 was conducted,and similarities and differences of severe convection processes were explored.The results showed that the two severe convection processes occurred in the situation that there lacked high-altitude trough moving eastward,but low altitude was accompanied by shear line,which was triggered under conditional thermal instability.Vertical velocity profile displayed that severe convection was accompanied by strong convergence and upward movement,and K index and water vapor flux divergence had good corresponding relationship with the occurrence and extinction of severe convection weather in time.The occurrence of strong wind area had certain indicative significance for the prediction of severe convection weather.
基金Supported by Technology Research and Development Project of Strong Electro-magnetic Pulse Protection(Lightning)of Sea Wind Field in Guangdong Yuedi-an Zhuhai Biqing Bay.
文摘Lightning interception technology is one of the three core technical systems of regional lightning protection theory.Among them,the omni-directional multi-pulse lightning interceptor(hereinafter referred to as lightning interceptor,the same below)has the ability to attenuate lightning current≥40%and significantly reduce the intensity of the spatial electromagnetic field around the lightning point.In order to explore the attenuation mechanism and effect of lightning interceptor to lightning current,this paper analyzed a lightning stroke process at 16:00 on August 19,2022,and tried to explain the attenuation effect of lightning interceptor to lightning current with the physical parameters of lightning stroke.
