Albedo measurements from radiation station 2020R12@en

Solar radiation over and under sea ice was measured by radiation station 2020R12, an autonomous platform, installed on drifting Second-Year-Ice (SYI) in the Arctic Ocean during MOSAiC (Leg 3) 2019/20. The resulting time series describes radiation measurements as a function of place and time between 24 April 2020 and 07 August 2020 in sample intervals of 1 hous. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 1 m above the sea ice surface. The third sensor was mounted 0.5 m underneath the sea ice measuring the downward transmitted irradiance. Along with the radiation measurements, this autonomous platform consisted of a lightchain, which measured counts of red, green and blue light at 49 positions at hourly intervals. In addition, the evolution of snow height is measured at hourly intervals. All times are given in UTC.2019/20年北极气候多学科漂流观测计划（MOSAiC）第3航次期间，自主观测平台辐射站2020R12部署于北冰洋漂流的二年海冰（Second-Year-Ice，SYI）之上，用于测量海冰上方与下方的太阳辐射。所得时间序列记录了2020年4月24日至2020年8月7日期间以1小时为采样间隔的辐射测量数据，该数据随空间位置与时间动态变化。本次辐射观测采用光谱辐射计完成，所有数据均以全光谱分辨率输出，已插值至1.0 nm间隔，并在全波长范围（宽带总辐射：320~950 nm）内积分得到。两台传感器——太阳入射辐照度传感器与向上反射太阳辐照度传感器——安装于海冰表面上方约1米处的观测平台上；第三台传感器安装于海冰下方0.5米处，用于测量向下透射的太阳辐照度。除辐射观测外，该自主平台还搭载了光链（lightchain）系统，以1小时为间隔对49个点位的红、绿、蓝三通道光强计数进行采集。此外，该平台还以1小时为间隔监测雪深的动态变化。所有时间均采用协调世界时（UTC）标注。