Studies of Thunderstorm and Severe Storm Frequencies

闪电探测是几年前逐渐发展起来的 成为气象学的一项新技术。 到目前为止， 美国东部大约六年的闪电数据， 在美国中部，大约四个 在这个奖项下，昌农先生将 联合收割机结合闪电和作物损失的数据， 冰雹，由国家作物保险服务，以 研究闪电活动与冰雹的关系。 以作物和属性中使用的标准化标准为指导 保险业，也就是说，损失100万美元或更多，先生。 昌农还将研究如何发生严重的风暴， 美国在过去的四十年里， 十年尺度上的干旱期。

Lightning detection developed several years ago gradually emerges as a new technology in meteorology. By now, there are approximately six years of lightning data for the eastern U.S., more than two years for the central U.S., and approximately four years for the western U.S. Under this award, Mr. Changnon will combine this archive on lightning and data on crop loss due to hail, provided by the National Crop Insurance Service, to examine the relation between lightning activity and hailstorms. Guided by a normalized criterion used in the crop and property insurance industry, that is, damage of $1 million or more, Mr. Changnon will also examine how the occurrence of severe storms in the U.S. varied in the last forty years with prolonged wet and dry periods on the decadal scale.