DOI: 10.5281/zenodo.2616605
title: Nutrient concentration in seawater samples, collected from the underway supply, CTD and trace metal rosettes in the Southern Ocean during the austral summer of 2016/2017, on board the Antarctic Circumnavigation Expedition (ACE).

description: <strong>Dataset abstract</strong> This dataset presents concentrations of nutrients (µmol/L): nitrous oxide (NOx), nitrate, nitrite, ammonium (NH4), phosphate (PO4) and silicic acid (Si), measured in samples of seawater during the Antarctic Circumnavigation Expedition (ACE). Samples were collected from CTD and trace metal rosette (TMR) deployments, as well as from the underway water supply on board, then analysed by flow injection following certified standards. This data was collected to support physical, chemical and biological oceanography studies in the Southern Ocean, conducted as part of ACE during the austral summer of 2016/2017. <strong>Dataset contents</strong> ace_seawater_nutrient_data.csv, data file, comma-separated values data_analysis_nutrient_concentration_standards.csv, metadata, comma-separated values quality_checking_crm_analysis_results.csv, metadata, comma-separated values nutrient_concentrations_along_track_visualisation.png, metadata, portable network graphics ace_seawater_nutrients_comparison_plots_tmr_ctd.pdf, metadata, portable document format data_file_header.txt, metadata, text README.txt, metadata text change_log.txt <strong>Change log</strong> v1.1 - various changes to data and metadata, described below added further data points to data file (those sampled from trace metal rosette) added ACE station number and ACE event number to data file reordered columns in data file updated README with information about sampling of trace metal rosette updated README with new citation, license, dataset contact and dataset contents, updated abstract updated data_file_header with new data fields added comparison plot of CTD and TMR data points updated caption of plot of nutrient concentrations along track (only from CTD samples) v1.0 - initial release of dataset <strong>Dataset license</strong> This nutrient concentration dataset is made available under the Creative Commons Attribution 4.0 International License (CC BY 4.0) whose full text can be found at https://creativecommons.org/licenses/by/4.0/
description: The Antarctic Circumnavigation Expedition was made possible by funding from the Swiss Polar Institute and Ferring Pharmaceuticals. This work was also supported by École Polytecnique Fédérale de Lausanne (EPFL). Data usage: When data from up to four stations are used, please acknowledge Christel Hassler, Michael Ellwood, Tina Brenneis and the Alfred Wegener Institute where the analysis was performed. When using data from more than four stations, please add co-authorship to Christel Hassler and Michael Ellwood and acknowledge Tina Brenneis from the Alfred Wegener Institute for analysis.
description: {"references": ["Thomas, Jenny, & Pina Estany, Carles. (2019). Quality-checked, one-second cruise track of the Antarctic Circumnavigation Expedition (ACE) undertaken during the austral summer of 2016/2017. (Version 1.0) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.3260616", "David W H Walton, & Jenny Thomas. (2018, November 22). Cruise Report - Antarctic Circumnavigation Expedition (ACE) 20th December 2016 - 19th March 2017 (Version 1.0). Zenodo. https://doi.org/10.5281/zenodo.1443511"]}