Thunderstorm Electrification in STEPS-2000

STEPS-2000 中的雷暴电气化

• 批准号: 0070934
• 负责人: William Winn
• 金额: $ 38.92万
• 依托单位: New Mexico Institute of Mining and Technology
• 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: 2000-04-15 至 2004-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0070934&HistoricalAwards=false
• 关键词: Thunderstorm; Electrification; STEPS; 2000

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, an instrument will be flown on the T-28 storm-penetration aircraft that provides images of graupel and hail particles and simultaneously measures their electrical charges. Dr. Winn will maintain this instrument during the field program and collaborate in the analysis of the data afterwards. The data will be used to assess the so-called noninductive charging hypothesis of lightning generation, which attempts to explain the creation of strong electric fields in thunderstorms by the systematic transfer of charges between ice particles of different sizes as they collide. This project also includes the development and deployment during STEPS of a new, balloon-borne instrument for measuring vertical profiles of the electric field. Used in connection with the New Mexico Tech lightning-mapping array, its position is determined by GPS navigation and the data on electric field strength are transmitted to the array by a pulse-modulated signal. STEPS provides the opportunity to evaluate this instrument by comparing the measurements with those using conventional equipment. Analysis of the data will be coordinated with other NSF-supported STEPS projects, including the New Mexico Tech lightning mapper (ATM-9912073), the CHILL radar (ATM-9912051 and -9982030), and other balloon soundings of the electric field (ATM-9912562).

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，T-28 风暴穿透飞机上将搭载一台仪器，提供霰和冰雹颗粒的图像，并同时测量它们的电荷。 Winn 博士将在现场项目期间维护该仪器，并在之后合作分析数据。 这些数据将用于评估所谓的闪电产生的非感应充电假说，该假说试图解释雷暴中强电场的产生是通过不同大小的冰粒碰撞时电荷之间的系统转移来解释的。 该项目还包括在 STEPS 期间开发和部署一种新型气球载仪器，用于测量电场的垂直分布。 与新墨西哥理工学院闪电测绘阵列结合使用，其位置由 GPS 导航确定，电场强度数据通过脉冲调制信号传输到阵列。 STEPS 提供了通过将测量结果与使用传统设备的测量结果进行比较来评估该仪器的机会。 数据分析将与其他 NSF 支持的 STEPS 项目协调，包括新墨西哥科技闪电测绘仪 (ATM-9912073)、CHILL 雷达（ATM-9912051 和 -9982030）以及其他电场气球探测 (ATM-9912562)。