Solar radiation over and under sea ice during POLARSTERN cruise PS92 (TRANSSIZ) in 2015

Measurements of solar radiation over and under sea ice have been performed on various stations in the Arctic Ocean during the Polarstern cruise PS92 (TRANSSIZ) between 19 May and 30 June 2015. All radiation measurements have been performed with Ramses spectral radiometers (Trios, Rastede, Germany). 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 were mounted on a Remotely Operated Vehicle (ROV) and one radiometer was installed on the sea ice for surface reference measurements (solar irradiance). On the ROV, one irradiance sensor (cos-collector) for energy budget calculations and one radiance sensor (9° opening angle) to obtain high resolution spatial variability were installed. Along with the radiation measurements, ROV positions were obtained from acoustic USBL-positioning and all parameters of vehicle depth, distance to the ice and attitude recorded. All times are given in UTC.2015年5月19日至6月30日期间，在北冰洋的多个科考站点，于极星号（Polarstern）科考船PS92航次（TRANSSIZ计划）中完成了海冰上方及下方的太阳辐射测量工作。所有辐射测量均采用德国拉施泰德Trios公司生产的Ramses型光谱辐射计完成。所有数据均以全光谱分辨率输出，并插值至1.0 nm采样步长，同时在全波长范围（宽带总辐射：320 nm至950 nm）内积分得到最终结果。两套传感器搭载于遥控水下机器人（Remotely Operated Vehicle, ROV）上，另有一台辐射计安装于海冰表面，用于开展表面基准测量（太阳辐照度）。该ROV上分别安装了一台用于能量收支计算的辐照度传感器（余弦收集器），以及一台视场角为9°的辐亮度传感器，以获取高分辨率空间变异性数据。除辐射测量外，ROV的位置通过声学超短基线（USBL）定位系统获取，同时同步记录了机器人的下潜深度、与海冰的距离及姿态等参数。所有时间数据均采用协调世界时（UTC）标注。