Biogeochemical data - 2017 Winter Cruise Atlantic-Indian Southern Ocean

Nutrient data from underway (surface, ~7 m) and CTD (surface only, ~10 m) samples. Nutrients include ammonium, nitrate, nitrite, urea, phosphate, and silicate concentrations. Particulate organic nitrogen and carbon concentrations, chlorophyll-a concentrations, inorganic carbon uptake rates, and nitrogen (nitrate, ammonium, urea) uptake rates are included - all for two size classes: >0.3 microns and >2.7 microns. Ammonium oxidation rates are also provided. Plankton abundances are provided for various groups (microplankton enumerated with microscopy and nano- and picoplankton enumerated using flow cytometry).

本数据集涵盖走航（表层，约7米）及CTD（仅采集表层样品，约10米）获取的样品的营养盐数据。所检测的营养盐指标包括铵盐（ammonium）、硝酸盐（nitrate）、亚硝酸盐（nitrite）、尿素（urea）、磷酸盐（phosphate）与硅酸盐（silicate）的浓度。此外还包含颗粒有机氮、颗粒有机碳浓度，叶绿素a浓度，无机碳摄取速率，以及氮（硝酸盐、铵盐、尿素）摄取速率——上述所有指标均分为两个粒径等级：>0.3微米与>2.7微米。数据集同时提供铵盐氧化速率数据。不同类群浮游生物的丰度数据亦有收录：微型浮游生物（microplankton）通过显微镜完成计数，纳米浮游生物与皮克浮游生物（nano- and picoplankton）则借助流式细胞仪进行计数。