KMKX NEXRAD IMPACTS V1

The KMKX 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. This Level II dataset contains 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.

KMKX NEXRAD IMPACTS 数据集汇聚了下一代气象雷达（NEXRAD）二级监视数据，这些数据于 2020 年 1 月 1 日至 3 月 1 日在 31 个 NEXRAD 站点收集，期间进行的实验旨在探究大西洋沿岸威胁性暴风雪的微物理和降水现象（IMPACTS）野外考察。IMPACTS 项目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。该考察旨在：（1）提供对雪带形成、组织和发展机制至关重要的观测；（2）探究雪粒的微物理特性和潜在增长机制在雪带中的变化；（3）改进降雪遥感解释和建模，以显著提升预测能力。目前，美国及其海外共有 160 个天气监视雷达-1988 多普勒（WSR-88D）或 NEXRAD 站点。该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、谱宽、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。值得注意的是，该数据集将在 IMPACTS 考察后续年份得到更新。