Dual Polarization Radar Observations, Analysis and Retrievals of Convective Lifecycle during RELAMPAGO

RELAMPAGO 期间对流生命周期的双偏振雷达观测、分析和反演

• 批准号: 1661863
• 负责人: Ve Chandrasekar
• 金额: $ 39.91万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-08-15 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1661863&HistoricalAwards=false
• 关键词: Dual; Polarization; Radar; Observations; Analysis

Traditionally meteorological radars have observed storms using single polarization to measure the intensity and velocity within storms. Past research has shown that significantly more information about the storms, their particle types, and stage of evolution can be gleamed from using two orthogonal polarizations in radars. This research focuses on the dual-polarization radar observations during the RELAMPAGO experiment in west Central Argentina. This region has among the most intense convective systems in the world in terms of frequency of large hail, very high storm tops, and extreme lightning activity, yet much remains unknown about the intense convection in this region. Because of the repeatability of storms in the region, this experiment will observe these storms to address science questions related to the initiation, initial organization/severe-weather generation, and growth stages of storm development, which are poorly understood. This research will improve the understanding of, and the ability to predict, severe convective storms worldwide. Similar environments exist in many parts of the world including the US Rocky Mountains and Asia (such as Chengdu basin in China and Himalayan plains on the Indian subcontinent). The radar techniques developed from this project has the potential to benefit all the nationwide deployment of dual-polarization radars in the US.This project will specifically address the analysis and retrieval of dual-polarization radar observations in some of the most intense convective storms, developing advanced retrieval techniques. The RELAMPAGO field observation set up will elucidate the tight connections between the, complex terrain, and the production of severe weather, role of terrain in initiating and developing organized convective storms and resultant intensity. Development and application of advanced radar techniques, specially using frequency domain procedures, to identify the type of precipitation particles in the storm is an important part of this project.

传统的气象雷达观测风暴使用单极化来测量风暴内的强度和速度。 过去的研究表明，通过在雷达中使用两个正交偏振，可以获得有关风暴、粒子类型和演变阶段的更多信息。 本研究的重点是在阿根廷中西部RELAMPAGO实验期间的双极化雷达观测。该地区拥有世界上最强烈的对流系统，包括大冰雹的频率，非常高的风暴顶部和极端的闪电活动，但对该地区的强对流仍知之甚少。由于该地区风暴的可重复性，该实验将观察这些风暴，以解决与风暴发展的启动，初始组织/恶劣天气生成和增长阶段有关的科学问题，这些问题知之甚少。 这项研究将提高对全球强对流风暴的理解和预测能力。类似的环境存在于世界许多地方，包括美国落基山脉和亚洲（如中国成都盆地和印度次大陆的喜马拉雅平原）。该项目开发的雷达技术有可能使美国全国范围内部署的所有双极化雷达受益。该项目将专门针对一些最强对流风暴的双极化雷达观测结果的分析和检索，开发先进的检索技术。RELAMPAGO实地观测装置将阐明复杂地形与恶劣天气的产生之间的紧密联系，地形在启动和发展有组织的对流风暴及其强度中的作用。 发展和应用先进的雷达技术，特别是使用频域程序，以识别风暴中降水粒子的类型，是这个项目的重要组成部分。

项目成果

Cross Validation of the Network of Ground-Based Radar with GPM during the Remote Sensing of Electrification, Lightning, And Mesoscale/Microscale Processes with Adaptive Ground Observations (RELAMPAGO) Field Campaign

在带自适应地面观测的电气化、闪电和中尺度/微尺度过程遥感 (RELAMPAGO) 现场活动期间对地基雷达网络与 GPM 进行交叉验证

• DOI: 10.2151/jmsj.2021-069
• 发表时间: 2021
• 期刊: Journal of the Meteorological Society of Japan. Ser. II
• 作者: ARIAS, Ivan;CHANDRASEKAR, V.
• 通讯作者: CHANDRASEKAR, V.

Cross-Validation of CSU-Chivo Radar and GPM During Relampago

Relampago 期间 CSU-Chivo 雷达和 GPM 的交叉验证

• DOI: 10.1109/igarss.2019.8898835
• 发表时间: 2019
• 期刊: IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium
• 作者: Arias, Ivan;Chandrasekar, V.;Joshil, Shashank S.
• 通讯作者: Joshil, Shashank S.