Winter phytoplankton pigment concentrations measured by HPLC in the upper 150m of the Indian Southern Ocean along the 30°E transect (GEOTRACES GIpr07) during 2017

Depth profiles of phytoplankton photosynthetic pigment concentrations were collected during the Winter 2017 scientific cruise from June to July 2017 on board the SA Agulhas II in the Indian sector of the Southern Ocean along the 30°E longitude between South Africa and Antarctica. Discrete seawater samples, for chlorophyll-a and accessory pigment analysis, were taken at depths from 10-150m from Niskin bottles on a CTD rosette. Filtered samples were later 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). This data is related to the publication by Viljoen et al. (2025): Winter dynamics of phytoplankton and micronutrients in the Southern Ocean in JGR Oceans - https://doi.org/10.1029/2025JC022431. Phytoplankton community structure determined via CHEMTAX analyses of pigment concentrations can be found in related repository at https://doi.org/10.5281/zenodo.6615070 and detailed methods in the related publication by Viljoen et al. (2025).2017年6月至7月，科研团队搭乘SA Agulhas II号科考船，于南大洋印度洋扇区沿30°E经度线（南非与南极洲之间海域）开展冬季科考巡航，采集浮游植物光合色素浓度的深度剖面数据。本次科考采用温盐深采水器架（CTD rosette）上的尼斯金采水器（Niskin bottles），在10~150米深度采集离散海水样本，用于叶绿素a及辅助色素分析。过滤后的样本随后于维尔弗朗什海洋学实验室（Laboratoire d'Océanographie de Villefranche, LOV – CNRS），依照Ras等人2008年发表的方法（DOI: 10.5194/bg-5-353-2008），通过高效液相色谱（High-Performance Liquid Chromatography, HPLC）完成检测分析。 本数据集关联Viljoen等人2025年发表于《JGR Oceans》的研究论文《南大洋浮游植物与微量营养素冬季动态》，论文DOI链接为：https://doi.org/10.1029/2025JC022431。 通过色素浓度的CHEMTAX分析得到的浮游植物群落结构数据，可在关联数据集仓库中获取：https://doi.org/10.5281/zenodo.6615070，详细实验方法详见Viljoen等人2025年的相关研究论文。