Measurement and Anaylsis of Vertical Profiles of the Electric Field in Severe Storms During STEPS

STEPS期间强风暴电场垂直分布的测量与分析

• 批准号: 9912562
• 负责人: Donald MacGorman
• 金额: $ 35.96万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9912562&HistoricalAwards=false
• 关键词: Measurement; Anaylsis; Vertical; Profiles; Electric

The Severe Thunderstorm Electrification and Precipitation Study field program (STEPS), planned for the early summer of 2000 in western Kansas, will provide a wide range of observations in and around thunderstorms using aircraft, radar, and other observing systems. As part of STEPS, Dr. MacGorman and his Co-PI Dr. David Rust will launch balloons that are equipped to measure and transmit back to ground the temperature, wind speed and direction, and electric field strength as the balloons ascend through thunderstorms. Objectives of the research are (1) to examine the genesis of lightning flashes relative to the charge distribution of different types of severe storms; (2) to ascertain whether the relatively infrequent occurrence of positively charged cloud-to-ground lightning is associated with hail production and may be used as an indicator of storm severity; (3) to determine the electrical structure of thunderstorms in relation to the air motions and precipitation in the storms. Analysis of the data will be closely coordinated with other NSF-supported STEPS projects, including the New Mexico Tech lightning mapper (ATM-9912073), the CHILL radar (ATM-9912051 and -9982030), and the South Dakota armored T-28 airplane (ATM-9981175).

强雷暴带电和降水研究实地计划 (STEPS) 计划于 2000 年初夏在堪萨斯州西部进行，将利用飞机、雷达和其他观测系统对雷暴及其周围地区进行广泛的观测。 作为 STEPS 的一部分，MacGorman 博士和他的联合 PI 博士 David Rust 将发射气球，这些气球能够在气球穿过雷暴时测量温度、风速和风向以及电场强度并将其传回地面。 研究的目的是（1）研究闪电的成因与不同类型严重风暴的电荷分布之间的关系； (2) 确定相对罕见的带正电云对地闪电的发生是否与冰雹的产生有关，并可用作风暴严重程度的指标； (3) 确定雷暴的电性结构与雷暴中空气运动和降水的关系。 数据分析将与其他 NSF 支持的 STEPS 项目密切协调，包括新墨西哥科技闪电测绘仪 (ATM-9912073)、CHILL 雷达（ATM-9912051 和 -9982030）以及南达科他州装甲 T-28 飞机（ATM-9981175）。