Sea ice data - Bio-optics and physics measurements from Scott Base and McMurdo Sound 2014

As part of Australian Antarctic Science project # 4298 and Antarctica New Zealand project K131A, a total number of 24 sea ice sites were sampled for bio-optical measurements along 2 transects on land-fast sea ice in McMurdo Sound (Antarctica) during November 2014. Measurements included hyperspectral surface irradiance measurements (TriOS ASS) as well as under-ice radiance measurements using a TriOS ARC (350 – 900 nm, 3.3 nm resolution) radiometer mounted to an L-arm. After completion of radiometric measurements, snow thickness was measured with a ruler and an ice core was collected directly above the radiometer location. Sea-ice freeboard (tape measure) and ice thickness (ice core length) were recorded. Ice core (9 cm internal diameter) bottom sections (lowermost 0.1 m of ice cores) were collected and were used for determination of algal pigment content (using HPLC) and spectral ice algal absorption coefficients (ap, ad, aph). Sea ice physical properties including vertical profiles of ice temperature and salinity profiles were collected at some specific locations along the transects, which were sampled near Little Razorback Island and near Cape Evans, McMurdo Sound.

本数据集隶属于澳大利亚南极科学项目#4298与新西兰南极项目K131A。2014年11月，研究团队在南极麦克默多湾的固定海冰上沿2条断面开展采样，共获取24个海冰测点的生物光学测量数据。测量内容包括采用TriOS ASS设备采集的高光谱表面辐照度数据，以及将TriOS ARC辐射计（工作波段350–900 nm，分辨率3.3 nm）安装于L型支架上获取的冰下辐亮度数据。辐射测量完成后，研究人员使用直尺测量雪层厚度，并在辐射计测点正上方采集冰芯；同时记录了海冰干舷（采用卷尺测量）与冰厚（通过冰芯长度计算）。研究人员采集了内径9 cm的冰芯底部区段（冰芯最下方0.1 m部分），用于通过高效液相色谱法（HPLC）测定藻类色素含量，以及获取冰藻的光谱吸收系数（ap、ad、aph）。此外，团队在断面沿线位于麦克默多湾小剃背岛附近与埃文斯角附近的部分特定测点，采集了海冰物理性质数据，包括冰温垂直剖面与盐度剖面。