Lightning Propagation Inside Thunderstorms

雷暴中的闪电传播

• 批准号: 0331164
• 负责人: William Winn
• 金额: $ 99.07万
• 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: 2003
• 资助国家: 美国
• 起止时间: 2003-11-15 至 2009-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0331164&HistoricalAwards=false
• 关键词: Lightning; Propagation; Inside; Thunderstorms

This grant supports the development and use of new balloon-borne instruments to determine the electrical forces from charge carried by lightning channels inside thunderclouds. One of the instruments, an electric-field-change meter, detects the presence of ionizing waves that are not otherwise observable. Another, an electric field meter, measures the vertical profile of the electric field, which provides the energy to support the propagation of lightning. The measurements are analyzed in relation to high-resolution maps of lightning flashes obtained from a ground-based network of VHF receivers linked together by Global Positioning System (GPS) timing, called a lightning mapping array. Using the combination of balloon-borne observations, maps from the lightning array, and radar observations of storm structure, the immediate goals are to learn how lightning is initiated, how much electrical charge is required for the propagation of lightning channels inside clouds, and how lightning is related to the air motions and precipitation of thunderclouds. The long-term goal is to be able to deduce some of the properties of thunderstorms, including beneficial and damaging effects, from the characteristics of the lightning they produce.

这笔赠款支持开发和使用新的气球载仪器，以确定雷雨云内闪电通道携带的电荷的电力。 其中一种仪器是电场变化仪，它可以探测到电离波的存在，而这些电离波是无法通过其他方式观测到的。 另一种是电场仪，测量电场的垂直分布，电场提供能量支持闪电的传播。 的测量结果进行了分析，从地面网络的VHF接收器连接在一起的全球定位系统（GPS）的定时，称为闪电映射阵列获得的闪电的高分辨率地图。 利用气球观测、闪电阵列地图和风暴结构雷达观测的组合，直接目标是了解闪电是如何启动的，闪电通道在云中传播需要多少电荷，以及闪电与空气运动和雷暴云降水的关系。 长期目标是能够从雷暴产生的闪电的特征中推断出雷暴的一些特性，包括有益和有害的影响。