Porewater oxygen profiles in surface sediments of the North Atlantic Basin during RV Maria S. Merian cruise MSM96 ...

• Main Authors: Fröhberg, Nico, Paul, Sophie Anna Luise
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: North Atlantic; Oxygen; sediment; sedimentary geochemistry; Event label; Latitude of event; Longitude of event; Date/Time of event; Elevation of event; Optional event label; DEPTH, sediment/rock; Oxygen saturation; Station label; Core; Comment; Location; Location type; Sample ID; Multicorer with television; MultiCorer; Oxygen, microelectrode, ex-situ; MSM96; Maria S. Merian; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time iAtlantic; MareHub der marinen Zentren AWI, GEOMAR und HZG als Teil des DataHub des Forschungsbereichs Erde und Umwelt der HGF MareHub
• Online Access: https://dx.doi.org/10.1594/pangaea.931647; https://doi.pangaea.de/10.1594/PANGAEA.931647

Vertical profiles of dissolved oxygen (O2) concentrations in the surface sediment of the North Atlantic Basin were acquired during MSM96 through ex-situ voltametric measurements during this research cruise. For every multicorer station, one liner was selected and transported to the on-board cool room immediately for analysis at 5°C. At some stations, a second core was analyzed for validation and to achieve better measurement resolution. Measurements were carried out through cyclic voltammetry (start: -100 mV, vertex: -1900 mV, start: -100 mV, scan rate: 500 mv/s) with Hg/Au microelectrodes (100 µm diameter) in a 3-electrode configuration with an Ag/AgCl pseudoreference electrode and a Pt counter electrode using a modified custom version of the DStat open source potentiostat (Dryden & Wheeler, 2015; doi:10.1371/journal.pone.0140349). Working electrodes were polished and Hg-plated prior to the research cruise according to the method by Brendel & Luther III (1995; doi:10.1021/es00003a024) and repolished ...