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).

计划在2000年夏季初在堪萨斯州西部的雷暴电气化和降水研究现场计划（步骤），将在雷暴中及其周围进行广泛的观察，并使用飞机，雷达和其他观察系统提供。 作为台阶的一部分，麦克高尔曼博士及其副驾驶员戴维·鲁斯特（David Rust）博士将发射气球，该气球有能力测量和传输回到温度，风速和方向以及气场强度，随着气球通过雷暴而上升。 研究的目标是（1）检查相对于不同类型的严重风暴的电荷分布的闪电闪光的起源； （2）确定相对较少发生带正电荷的云到地面闪电的发生与冰雹产生有关，并且可以用作暴风雨严重程度的指标； （3）确定与风暴中的空气运动和降水有关的雷暴的电结构。 对数据的分析将与其他NSF支持的步骤项目密切协调，包括新墨西哥州技术闪电映射器（ATM-9912073），Chill Radar（ATM-9912051和-9982030）和South Dakota装甲装甲T-28飞机（ATM-9981175）。