KPBZ NEXRAD IMPACTS V1

The KPBZ NEXRAD IMPACTS dataset consists of Next Generation Weather Radar (NEXRAD) Level II surveillance data that were collected at 31 NEXRAD sites from January 1 to March 1, 2020 during the Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms (IMPACTS) field campaign. IMPACTS was a three-year sequence of winter season deployments conducted to study snowstorms over the U.S Atlantic Coast. The campaign aimed to (1) Provide observations critical to understanding the mechanisms of snowband formation, organization, and evolution; (2) Examine how the microphysical characteristics and likely growth mechanisms of snow particles vary across snowbands; and (3) Improve snowfall remote sensing interpretation and modeling to significantly advance prediction capabilities. There are currently 160 Weather Surveillance Radar-1988 Doppler (WSR-88D) or NEXRAD sites throughout the United States and abroad. These Level II datasets contain meteorological and dual-polarization base data quantities including: radar reflectivity, radial velocity, spectrum width, differential reflectivity, differential phase, and cross correlation ratio. The IMPACTS NEXRAD Level II data files are available in netCDF-4 format. It should be noted that this dataset will be updated in subsequent years of the IMPACTS campaign.

KPBZ NEXRAD IMPACTS 数据集包含自2020年1月1日至3月1日于31个NEXRAD站点收集的下一代天气雷达（NEXRAD）二级监视数据，这些数据是在对大西洋沿岸威胁性暴风雪的微物理和降水进行调查（IMPACTS）现场行动期间采集的。IMPACTS 是一项为期三年的冬季部署序列，旨在研究美国大西洋沿岸的暴风雪。该行动旨在（1）提供对理解雪带形成、组织和发展机制至关重要的观测数据；（2）探讨雪粒子的微物理特性和可能增长机制在不同雪带中的变化；（3）提升降雪遥感解释和建模能力，以显著推进预测能力。目前，美国及海外共有160个气象监视雷达-1988多普勒（WSR-88D）或NEXRAD站点。这些二级数据集包含气象和双极化基本数据量，包括：雷达反射率、径向速度、频谱宽度、差分反射率、差分相位和互相关比。IMPACTS NEXRAD二级数据文件以netCDF-4格式提供。需要注意的是，该数据集将在IMPACTS行动的后续年份进行更新。