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).

强雷暴电气化和降水研究现场项目（STEPS）计划于2000年初夏在堪萨斯州西部进行，将使用飞机、雷达和其他观测系统提供雷暴内部和周围的广泛观测。作为STEPS计划的一部分，麦戈尔曼博士和他的搭档大卫·拉斯特博士将发射气球，这些气球在雷暴中上升时，会测量温度、风速、风向和电场强度，并将它们传回地面。研究的目的是：(1)相对于不同类型强风暴的电荷分布，探讨闪电的成因；(2)厘清较少出现的带正电云对地闪电是否与产生冰雹有关，并可作为风暴严重程度的指标；(3)根据雷暴中的空气运动和降水确定雷暴的电性结构。数据分析将与其他nsf支持的STEPS项目密切协调，包括新墨西哥理工大学闪电测绘仪（ATM-9912073）、CHILL雷达（ATM-9912051和-9982030）和南达科他州装甲T-28飞机（ATM-9981175）。