Blossom Shoals water-column, seabed sediment, and bathymetry data. Icy Cape, Chukchi Sea, Alaska. 2019-2020.

This dataset includes vessel-based water-column profile and seabed data collected around Blossom Shoals, a shoal complex offshore of Icy Cape in northwestern Alaska (in the Chukchi Sea). Data were collected from the Research Vessel (R/V) Sikuliaq (offshore) and a companion workboat (inshore). Water-column profile data include salinity, temperature, depth, and turbidity data collected using a RBR Maestro CTD/Tu (conductivity, temperature, depth, turbidity) sensor package. Profile data also include median diameters and volumetric concentrations of suspended particles, where were collected using a Sequoia LISST200X (laser in situ scattering transmissometer). Seabed grab samples were collected from the Sikuliaq using a shipek grab sampler and from the workboat using a hand-operated mini van veen grab sampler. Samplers were bagged and returned chilled to the lab for particle-size analyses in an Escitec Bettersizer S3Plus laser diffraction sensor. Sediments were not treated for organics due to generally low organic contents. Samples contained primarily sand except for a few isolated locations where mud was found. Data were collected in November 2019 during the fall freezeup season when pancake ice were beginning to form. Data were also collected in late September and early October 2020 during a mooring recovery cruise. Single-beam bathymetry data (which were only collected in 2020) were gathered using a commercial fish finder mounted on the workboat and connected to a data logger.

本数据集包含在阿拉斯加西北部冰角（Icy Cape）近海的浅滩群布洛瑟姆浅滩（Blossom Shoals，位于楚科奇海（Chukchi Sea））周边采集的船载水柱剖面与海底数据。数据采集平台包括近海作业的‘西库利亚克号’研究船（R/V Sikuliaq），以及用于近岸作业的配套工作艇。水柱剖面数据包含盐度、温度、深度与浊度数据，采集自RBR Maestro CTD/Tu（电导、温度、深度、浊度）一体式传感器套件。该剖面数据还涵盖悬浮颗粒物的中值粒径与体积浓度，采集自Sequoia LISST200X（原位激光散射透射仪）。海底抓取采样分别通过‘西库利亚克号’上的希佩克抓取采样器，以及工作艇上的手动小型范恩抓取采样器完成。采集的样本经封装后低温运回实验室，采用Escitec Bettersizer S3Plus激光衍射传感器开展粒度分析。由于沉积物有机含量普遍较低，未对其进行有机物前处理。采集的沉积物样本以砂质为主，仅少数孤立点位发现泥质沉积物。数据采集工作于2019年11月开展，时值秋季封冻季，此时饼状冰开始形成。2020年9月末至10月初的锚系回收航次中也完成了数据采集。仅在2020年采集的单波束测深数据，通过安装于工作艇并连接数据记录仪的商用探鱼仪获取。