Precipitation Occurrence Sensor System measurements taken at Summit Station, Greenland, 2020

This data set contains measurements of reflectivity and derived estimates of snowfall rate made by a Precipitation Occurrence Sensor System (POSS) that is deployed at Summit Station, Greenland as part of the Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit (ICECAPS) Project. The POSS makes measurements in an approximately one cubic meter volume just above the sensor and is designed to quantify the amount of precipitation reaching the surface. Data files contain timeseries of the observed radar reflectivity and other supporting radar measureables as well as the derived snowfall rate in mm/hr. Detailed information on these parameters and other aspects of the dataset are included in the netCDF header information for each file. The POSS is operated by Matthew Shupe at the University of Colorado and is on loan from Environment Canada. Field operations are supported by the National Science Foundation's Arctic Observing Network (AON) Program.本数据集包含由降水事件传感器系统（Precipitation Occurrence Sensor System, POSS）采集的反射率测量数据及衍生降雪率估算值。该系统部署于格陵兰岛顶峰站（Summit Station），隶属于“格陵兰顶峰能量、云、大气状态与降水综合表征”（Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit, ICECAPS）项目。POSS的测量区域为传感器正上方约1立方米的空间，其设计初衷为量化抵达地表的降水量。数据文件包含观测雷达反射率、其他辅助雷达测量参数的时间序列，以及以毫米/小时为单位的衍生降雪率数据。各数据文件的netCDF头文件中收录了上述参数及数据集其他方面的详细信息。该POSS系统由科罗拉多大学的Matthew Shupe负责运维，设备由加拿大环境部借出。本项目的野外作业得到了美国国家科学基金会北极观测网络（Arctic Observing Network, AON）项目的资助。