RUI: The Characteristics of Cloud-to-ground Lightning in High Plains Thunderstorms (Hailswath II)

RUI：高原雷暴中云对地闪电的特征（Hailswath II）

• 批准号: 8722916
• 负责人: John Helsdon
• 金额: $ 11.45万
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1991-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8722916&HistoricalAwards=false
• 关键词: RUI; Characteristics; Cloud; ground; Lightning

The objective of this research is the investigation of characteristics of cloud-to-ground (CG) lightning in High Plains thunderstorms during the North Dakota Thunderstorm Project, scheduled for the summer of 1989. Professor Helsdon will use existing direction finders to obtain data on the time, location, stroke multiplicity, polarity, and signal strength of the CG lightning. A graphics display system will be developed to analyze the lightning positions with respect to satellite and radar data. Lightning locations with respect to radar and satellite image features will be analyzed and compared with previous results from other regions of the country. The relationship between feeder cell evolution and CG lightning characteristics will be investigated and the effects of hail episodes on lightning characteristics will be analyzed. Finally, a test for the effects of glaciogenic seeding of CG lightning will be made.

本研究的目的是调查1989年夏季北达科他州雷暴项目期间高平原雷暴中云对地闪电的特征。Helsdon教授将使用现有的测向仪来获取有关CG闪电的时间、位置、冲程多重性、极性和信号强度的数据。将发展一个图形显示系统，根据卫星和雷达数据分析闪电位置。将分析闪电位置的雷达和卫星图像特征，并与该国其他地区以前的结果进行比较。研究馈线细胞演化与CG闪电特征的关系，分析冰雹事件对闪电特征的影响。最后，对CG闪电的冰期播种效果进行了试验研究。