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

这个项目研究了强风暴中冰雹形成、风暴带电和闪电之间的联系。它包括对穿透风暴的T-28飞机收集的云、电和微物理数据进行分析，并用三维数值云模式模拟电荷和降水的产生。观测和模拟结果将与2000年初夏在堪萨斯州进行的STEPS计划(强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，包括极化雷达测量以确定降水类型，双多普勒雷达测量以确定雷暴的运动结构，气球携带的电场测量，以及由甚高频闪电测图仪测量的闪电划出的三维地图。综合STEP提供的电学、微物理和风暴结构数据，将有助于更好地理解雷暴中闪电的形成机制，以及风暴的电学性质与其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.