Further Analysis and Modeling Studies of Severe Thunderstorm Electrification and Precipitation Study (STEPS) Cases

强雷暴带电和降水研究（STEPS）案例的进一步分析和建模研究

• 批准号: 0245147
• 负责人: John Helsdon
• 金额: $ 26.1万
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-04-01 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0245147&HistoricalAwards=false
• 关键词: Further; Analysis; Modeling; Studies; Severe

This project continues the work initiated earlier on analysis and modeling of storms observed on the STEPS program (Severe Thunderstorm Electrification and Precipitation Study) conducted in Kansas in the early summer of 2000. 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 research is carried out in collaboration with other STEPS investigators, who will provide data including 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. Attention will focus on the storms of 11 June and 29 June 2000. A major objective is to explain why some storms produce predominantly positive cloud-to-ground lightning discharges while others produce negative discharges. A synthesis of the electrical, microphysical, and storm-structure data 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.

该项目继续进行较早开始的工作，以分析和建模在2000年初在堪萨斯州进行的步骤计划（严重的雷暴电气化和降水研究）。它包括分析由风暴渗透的T-28飞机收集的云电气和微物理数据的分析，并用三二维数字模型的收费和沉淀物的产生以及建模。 这项研究是与其他步骤调查人员合作进行的，这些研究人员将提供包括极化雷达测量值的数据，以识别降水类型，双多普勒雷达测量测量，以定义雷暴的运动结构，气球 - 生气的电场测量值，以及通过VHF Lightning Mappers vhf Lightning Lightning Lightning Lightning Lightning Mapperer的三维中型图。 关注将集中在2000年6月11日和6月29日的风暴上。一个主要目的是解释为什么有些风暴主要产生主要的云到地面闪电释放，而另一些则产生负分离。 电气，微物理和暴风雨结构数据的合成将使人们更好地理解雷暴中闪电形成的机理，以及风暴的电性能与它们产生的降水量之间的关系。