Surface summer phytoplankton pigment concentrations measured by HPLC during the SANAE-56 cruise in the Atlantic Southern Ocean between December 2016 and February 2017@en

Surface phytoplankton photosynthetic pigment concentrations were collected during the logistical austral summer cruise SANAE-56 from December 2016 to February 2017 on board the SA Agulhas II in the Atlantic sector of the Southern Ocean. The cruise consisted of various legs that covered a transect between Cape Town and Antarctica (primarily on the zero meridian) and a transect between Antarctica and South Georgia crossing the Weddell Gyre and the South Sandwich Islands. Discrete seawater samples, for chlorophyll-a and accessory pigment analysis, were taken at relatively high (<1 degree) resolution from the ship's underway supply system (5-6m water depth) to determine the surface phytoplankton community abundance and structure. Filtered samples were analysed by High-Performance Liquid Chromatography (HPLC) at Laboratoire d'Océanographie de Villefranche (LOV – CNRS) according to Ras et al. 2008 (doi:10.5194/bg-5-353-2008).本数据集收录了2016年12月至2017年2月期间，在南大洋大西洋扇区搭乘SA Agulhas II号科考船执行的南极夏季后勤航次SANAE-56中采集的表层浮游植物光合色素浓度数据。本次航次包含多个航段，涵盖开普敦至南极洲的断面航行（基本沿本初子午线行进），以及南极洲至南乔治亚岛的断面航行，该断面途经威德尔环流（Weddell Gyre）和南桑威奇群岛。研究团队以较高的采样分辨率（采样间隔小于1°）从船载走航供水系统（取水深度5-6米）采集离散海水样品，用于叶绿素a（chlorophyll-a）与辅助色素分析，以解析表层浮游植物群落的丰度与结构组成。过滤后的样品由维勒弗朗什海洋学实验室（Laboratoire d'Océanographie de Villefranche，缩写LOV – CNRS）参照Ras等人2008年的研究方法（doi:10.5194/bg-5-353-2008），采用高效液相色谱法（High-Performance Liquid Chromatography, HPLC）完成分析。