Radar Studies of Clouds and Precipitation

云和降水的雷达研究

• 批准号: 9407074
• 负责人: Ramesh Srivastava
• 金额: $ 60.77万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 2000-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407074&HistoricalAwards=false
• 关键词: Radar; Studies; Clouds; Precipitation

9407074 Srivastava The objectives of this work are the structure and evolution of the (size) spectra of both raindrops and cloud drops. Characteristics of the former, including rain rate and water content, will be explored using observations from two radars, transmitting at different frequencies, and evaluating the attenuation to "improve" the backscattered reflectivity. Characteristics of cloud drop spectra, on the other hand, will be investigated using recent numerical results to improve existing theory and the use of VHF radar to measure droplet spectra at selected sites. Both topics will help to understand the physics of (liquid) precipitation.

9407074 Srivastava 这项工作的目标是雨滴和云滴（大小）光谱的结构和演变。 前者的特征，包括降雨率和含水量，将利用两个雷达的观测结果进行探索，以不同频率发射，并评估衰减以“改善”反向散射反射率。 另一方面，将利用最新的数值结果来研究云滴光谱的特征，以改进现有理论，并使用甚高频雷达测量选定地点的液滴光谱。 这两个主题都将有助于理解（液体）沉淀的物理原理。