The Physical and Meteorological Characteristics Associated with Lightning Flashes to Ground

9213787 Orville这个提案的目标是在德克萨斯农工大学启动一个闪电研究项目。pi将研究对流系统中云对地闪电和云内闪电的气象和物理特征。这包括飑线、中尺度对流系统、冷锋和暖锋。利用闪电和多普勒雷达数据，他们将重点研究云对地的负闪动和正闪动的位置、它们的峰值电流和它们的多重性，以及对流系统的(1)最大反射率面积（dBZ）作为高度和时间的函数，(2)上升气流和下降气流核心，(3)由与水平切变相关的涡度决定的中气旋强度，以及(4)风的径向散度作为高度和时间的函数。* * *

9213787 Orville This proposal's objective is to initiate a lightning research program at Texas A&M University. The PIs will investigate the meteorological and physical characteristics of cloud-to-ground lightning and intracloud lightning in convective systems. This includes squall lines, mesoscale convective systems, and cold and warm fronts. Using the lightning and Doppler radar data, they will focus on the location of negative and positive cloud-to-ground flashes, their peak currents, and their multiplicity, with respect to a convective systems' (1) maximum reflectivity area (dBZ) as a function of height and time, (2) updraft and downdraft cores, (3) mesocyclone strength as determined from the vorticity associated with the horizontal shear, and (4) radial divergence of the wind as a function of height and time. ***