Porewater nutrients of the Northeast Greenland (NEG) shelf sediments from POLARSTERN cruise PS109


Sediment porewater chemistry (nutrient, DIC, sulfide and sulfate) on the Northeast Greenland shelf were assessed with R/V Polarstern during PS109 between September and October 2017 using two cores with pre-drilled holes mounted on a multiple corer (MUC) a camera-equipped multiple corer (TV-MUC; core area 0.007 m²). Upon arrival on deck, Rhizon samplers were inserted carefully into the holes with intervals of 1 cm until 10 cm sediment depth, and 2 cm intervals until 20 cm sediment depth to extract the sediment porewater. To get a total of 9 ml/l porewater for each depth interval, the porewater from both cores was pooled for each depth. For the analysis of DIC, 2 ml/l porewater from each depth was transferred to a glass vial which had been pre-treated with HgCl₂ and stored at 4°C. DIC concentrations were measured using a flow injection system equipped with the Spark Optimas auto-sampler (model 820, Ambacht, Netherlands). For the determination of porewater nutrients, 4 ml/l of porewater was sampled with acid-washed Sarstedt Vials and stored at -20°C. In the laboratory, 4 ml/l was subsampled for phosphate, silicate and ammonium, while 1 ml/l was subsampled for nitrate and nitrite, and subsequently analyzed with a Continuous Segmented Flow Analyser (QuAAtro39, SEAL Analytical, Norderstedt, Germany).

DOI https://doi.org/10.1594/PANGAEA.959549
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.959549
Creator Braeckman, Ulrike ORCID logo; Felden, Janine ORCID logo
Publisher PANGAEA
Publication Year 2024
Funding Reference Research Foundation of Flanders https://doi.org/10.13039/501100003130 Crossref Funder ID 1201720N ; The Research Council of Norway https://doi.org/10.13039/501100005416 Crossref Funder ID 276730 The Nansen Legacy
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 1956 data points
Discipline Earth System Research
Spatial Coverage (-19.322W, 76.487S, -7.132E, 80.318N)
Temporal Coverage Begin 2017-09-17T12:24:00Z
Temporal Coverage End 2017-10-07T02:06:00Z