Total and phytoplankton group chlorophyll concentrations from underway spectrophotometry with water mass classification in the East Greenland Sea from Polarstern expeditions 2015-2024@en

We present a high spatially resolved (around 300 m) data set on the chlorophyll-a concentrations of all phytoplankton (total chlorophyll-a), diatoms, haptophytes and chlorophytes various phytoplankton pigments (unit: mg/m³) estimated from particulate absorption data derived from underway AC-S measurements operated on eight R/V POLARSTERN expeditions in the Greenland Sea (North of 66.3°N to 82°N within the Atlantic Ocean) between 2015 to 2024: PS93.2, PS99.2, PS107, PS121, PS126, PS131, PS136 and PS143-2. For each data point we further provide the percentage of Atlantic Water and Polar Water and the association into the three regions: East Greenland Sea, Central Fram Strait and West Spitsbergen Current. Mind that the classification of water masses and regions is only valid for the Hausgarten area (78°N to 80°N and 7°W to 15°E). The details of the instrument set-up, the data and the methods are described in Bracher et al. (2025).本研究提供一套高空间分辨率（约300米）的数据集，其内容涵盖基于2015年至2024年间在大西洋格陵兰海（北纬66.3°以北至82°N海域）开展的8次“极星号”（R/V POLARSTERN）科考航次（航次编号分别为PS93.2、PS99.2、PS107、PS121、PS126、PS131、PS136及PS143-2）的走航式AC-S（AC-S）测量获取的颗粒物吸收数据，反演得到的所有浮游植物总叶绿素a（total chlorophyll-a）浓度，以及硅藻（diatoms）、定鞭藻门（haptophytes）、绿藻门（chlorophytes）等类群的各类浮游植物叶绿素类色素浓度，单位为mg/m³。针对每个数据点，本数据集还提供了大西洋水团（Atlantic Water）与极地水团（Polar Water）的占比，以及数据所属的三个区域划分：东格陵兰海、弗拉姆海峡中部与西斯匹次卑尔根海流（West Spitsbergen Current）。需注意，上述水团与区域的分类仅适用于豪斯加滕海域（Hausgarten area，北纬78°N至80°N、西经7°至东经15°）。仪器配置、数据集细节及相关研究方法的详细信息参见Bracher等人（2025）的研究成果。