Airborne Observations and Storm Modeling in Support of the Severe Thunderstorm Electrification and Precipitation Study (STEPS)

这个项目调查冰雹形成、风暴起电和强风暴中闪电之间的联系。 它包括分析穿透风暴的T-28飞机收集的云电和微物理数据，并用三维数值云模型模拟电荷和降水的产生。 观测和建模结果将与2000年初夏在堪萨斯进行的STEPS计划（严重雷暴电气化和降水研究）的其他研究人员分享。 其他调查人员将提供观测资料，包括确定降水类型的偏振雷达测量资料、确定雷暴运动结构的双多普勒雷达测量资料、气球载电场测量资料以及由甚高频闪电绘图仪测量的闪电三维图。 综合STEPS提供的电、微物理和风暴结构数据，将有助于更好地了解雷暴中闪电形成的机制以及风暴的电特性与它们产生的降水之间的关系。

This project investigates the links between hail formation, storm electrification, and lightning in severe storms. It includes the analysis of cloud electrical and microphysical data collected by the storm-penetrating T-28 aircraft and modeling the production of charge and precipitation with a three-dimensional numerical cloud model. The observations and modeling results will be shared with other investigators on the STEPS program (Severe Thunderstorm Electrification and Precipitation Study) conducted in Kansas in the early summer of 2000. The other investigators will provide observations that include polarimetric radar measurements to identify precipitation type, dual-Doppler radar measurements to define the kinematic structure of thunderstorms, balloon-borne electrical field measurements, and three-dimensional maps of lightning strokes measured by a VHF lightning mapper. A synthesis of the electrical, microphysical, and storm-structure data supplied by STEPS will lead to a better understanding of the mechanism of lightning formation in thunderstorms and the relations between electrical properties of storms and the precipitation they produce.