Phytoplankton identifications in the northern Bering and Chukchi seas, quantified with FlowCAM image analysis, Arctic Integrated Ecosystem Research Program, ASGARD June 2017

These data are part of the ASGARD component of the Arctic Integrated Ecosystem Research Program (IERP), sponsored by the North Pacific Research Board (NPRB), Collaborative Alaskan Arctic Studies Program (formerly the North Slope Borough/Shell Baseline Studies Program), Bureau of Ocean Energy Management (BOEM), Office of Polar Programs National Science Foundation, and the Office of Naval Research Marine Mammals and Biology Program. These data were collected during the ASGARD cruise during June 2017. Data were collected at 1-2 depths within the water column on all the 'core' stations, as well as several other stations to fill in the spatial gaps. Replicate samples were analyzed at some stations. Samples were analyzed by FlowCAM image analysis to quantify the abundance and size of large diatom particles (> 20 um). The total volume of living diatom particles and an indication of the dominant taxa along with the sample name (includes station and CTD number, depth, date and time of sample run), latitude, longitude, sample depth, and run volume, are provided in the summary file (summary.csv). In addition to these summary data, there are separate files for each sample that include attributes for every particle classified. File names format is St_XXX_Xm_XXXX.csv: station (St) number (ST_XXX, a three digit identifier), sample depth in meters (Xm or XXm), and the time of the sample run (HHMM, four digits). The data format is a csv file.

本数据集隶属于北极综合生态系统研究计划（Arctic Integrated Ecosystem Research Program, IERP）的ASGARD组成部分，由北太平洋研究委员会（North Pacific Research Board, NPRB）、阿拉斯加北极合作研究计划（前身为北斯莱普自治区/壳牌基线研究计划）、美国海洋能源管理局（Bureau of Ocean Energy Management, BOEM）、美国国家科学基金会极地项目办公室，以及美国海军研究办公室海洋哺乳动物与生物学项目共同资助。本数据集采集于2017年6月开展的ASGARD科考航次。所有"核心"站位及用于填补空间采样空白的其余多个站位，均在海洋水柱内1至2个深度层级采集数据；部分站位设置了重复采样并开展分析。所有样本均通过FlowCAM图像分析法检测，以量化粒径大于20微米的大型硅藻颗粒的丰度与粒径尺寸。汇总文件（summary.csv）包含活体硅藻颗粒的总体积、优势类群标识，以及样本元数据（含站位与CTD编号、采样深度、样本上机分析的日期与时间）、纬度、经度、样本采集深度及上机运行体积。除上述汇总数据外，每个样本均对应独立数据文件，其中存储了所有已分类颗粒的属性信息。文件命名格式为St_XXX_Xm_XXXX.csv：其中St为站位编号（ST_XXX为三位数字标识符），Xm或XXm代表样本采集深度（单位：米），HHMM为四位数字的样本上机分析时间。本数据集所有文件均采用csv格式。