Fröhberg, Nico; Paul, Sophie Anna Luise (2021): Porewater oxygen profiles in surface sediments of the North Atlantic Basin during RV Maria S. Merian cruise MSM96 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.931647
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Abstract:
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 (using diamond polishing plates of 5, 1 and 0.25 µm grit) and plated (180s at -100mV in 0.1M Hg(NO3)2 solution) on board when degradation of the signal was detected (twice over the duration of the cruise). Measurements were calibrated to 100% O2 saturation in bottom water at equilibrium with the atmosphere after recording air pressure and temperature to calculate dissolved O2 concentration as well as 0% O2 saturation in bottom water that was purged of oxygen by bubbling with nitrogen (N2) gas. The sensor was moved vertically on a linear axis with a stepper motor through an automated control system hosted on a Raspberry Pi control unit.
Related to:
Schoening, Timm; Paul, Sophie Anna Luise (2021): Metal geochemistry meets machine learning: Assessing sedimentary and pore-water rare earth element variability from local to basin scale across the NE Atlantic Ocean, Cruise No. MSM96, 10.10.2020 - 10.11.2020, Emden (Germany) - Emden (Germany). MARIA S. MERIAN-Berichte, Gutachterpanel Forschungsschiffe, MSM96, 77 pp, https://doi.org/10.48433/cr_msm96
Project(s):
Funding:
Horizon 2020 (H2020), grant/award no. 818123: Integrated Assessment of Atlantic Marine Ecosystems in Space and Time
Coverage:
Median Latitude: 43.439497 * Median Longitude: -15.917645 * South-bound Latitude: 37.908130 * West-bound Longitude: -17.700320 * North-bound Latitude: 48.100130 * East-bound Longitude: -14.511800
Date/Time Start: 2020-10-14T20:46:02 * Date/Time End: 2020-11-06T13:39:04
Minimum DEPTH, sediment/rock: -0.110 m * Maximum DEPTH, sediment/rock: 0.353 m
Event(s):
MSM96_7-3 (KIEL0233GEBU201) * Latitude: 47.961180 * Longitude: -14.639930 * Date/Time: 2020-10-14T20:46:02 * Elevation: -4821.1 m * Location: South Atlantic Ocean * Campaign: MSM96 (GPF 20‐3_088) * Basis: Maria S. Merian * Method/Device: Multicorer with television (TVMUC)
MSM96_8-1 (KIEL0233GECU201) * Latitude: 47.935000 * Longitude: -14.674170 * Date/Time: 2020-10-15T00:22:50 * Elevation: -4824.1 m * Location: South Atlantic Ocean * Campaign: MSM96 (GPF 20‐3_088) * Basis: Maria S. Merian * Method/Device: Multicorer with television (TVMUC)
MSM96_11-1 (KIEL0233GEMU201) * Latitude: 47.898530 * Longitude: -14.815270 * Date/Time: 2020-10-16T01:07:03 * Elevation: -5730.4 m * Location: South Atlantic Ocean * Campaign: MSM96 (GPF 20‐3_088) * Basis: Maria S. Merian * Method/Device: Multicorer with television (TVMUC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Fröhberg, Nico | |||
| 2 | Latitude of event | Latitude | Fröhberg, Nico | |||
| 3 | Longitude of event | Longitude | Fröhberg, Nico | |||
| 4 | Date/Time of event | Date/Time | Fröhberg, Nico | |||
| 5 | Elevation of event | Elevation | m | Fröhberg, Nico | ||
| 6 | Optional event label | Event 2 | Fröhberg, Nico | |||
| 7 | DEPTH, sediment/rock | Depth sed | m | Fröhberg, Nico | Geocode | |
| 8 | Oxygen saturation | O2 sat | % | Fröhberg, Nico | Oxygen, microelectrode, ex-situ | |
| 9 | Oxygen | O2 | µmol/l | Fröhberg, Nico | Oxygen, microelectrode, ex-situ | |
| 10 | Station label | Station | Fröhberg, Nico | |||
| 11 | Core | Core | Fröhberg, Nico | Liner | ||
| 12 | Comment | Comment | Fröhberg, Nico | |||
| 13 | Location | Location | Fröhberg, Nico | Work area | ||
| 14 | Location type | Loc type | Fröhberg, Nico | Terrain | ||
| 15 | Sample ID | Sample ID | Fröhberg, Nico |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
44830 data points
Download Data
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