View in EDS

Ex situ diffusive oxygen uptake of the Northeast Greenland (NEG) shelf sediments from POLARSTERN cruise PS109

Saved in:
Bibliographic Details
Title: Ex situ diffusive oxygen uptake of the Northeast Greenland (NEG) shelf sediments from POLARSTERN cruise PS109
Authors: Felden, Janine, Wenzhöfer, Frank, Braeckman, Ulrike
Publisher Information: PANGAEA
Publication Year: 2024
Collection: PANGAEA - Data Publisher for Earth & Environmental Science (AWI Bremerhaven / MARUM Bremen)
Subject Terms: ARK-XXXI/4, Comment, Date/Time of event, DOU, Elevation of event, Event label, ex situ, FRAM, FRontiers in Arctic marine Monitoring, Latitude of event, Longitude of event, Method/Device of event, microoptode, Multicorer with television, Number, Oxygen Logger (Firesting O2-C4) equipped with retractable needle type optodes (OXR50), Pyroscience, Firesting, oxygen uptake, diffusive, Polarstern, PS109, PS109_105-1, PS109_115-3, PS109_122-1, PS109_125-2, PS109_139-2, PS109_154-1, PS109_19-4, PS109_36-3
Subject Geographic: MEDIAN LATITUDE: 78.713779 * MEDIAN LONGITUDE: -14.635143 * SOUTH-BOUND LATITUDE: 76.486900 * WEST-BOUND LONGITUDE: -19.318270 * NORTH-BOUND LATITUDE: 80.312990 * EAST-BOUND LONGITUDE: -7.132010 * DATE/TIME START: 2017-09-17T15:16:00 * DATE/TIME END: 2017-10-07T02:06:00 * MINIMUM ELEVATION: -1176.0 m * MAXIMUM ELEVATION: -69.0 m
Description: Ex situ diffusive oxygen uptake (DOU) at the sediment water interface was assessed on the Northeast Greenland shelf with R/V Polarstern during PS109 between September and October 2017 using a camera-equipped multiple corer (TV-MUC; core area 0.007 m²). Upon arrival on deck, part of the overlying water of three MUC cores was collected and stored separately at in situ temperature. The remaining overlying water was adjusted to 10 cm above the sediment by gently pushing the sediment upwards while avoiding a disturbance of the surface sediment. The cores were then placed in a temperature-controlled water bath in the ship-board laboratory which had been adjusted to the in-situ temperature at the seafloor (information was retrieved from ship-board sensors). A mangetic stirrer was deployed in order to homogenise the overlying water, and a small air pump gently aerated the water. DOU was assessed with 2 oxygen optodes (Pyroscience, Firesting; tip size 50 µm) mounted on an autonomous microprofiler module. Each core was measured with two microprofilers simultaneously, usually within 2h of sampling (except for stations 139, 85, 84 and 76, where the measurement times were >24h). The sensors were two-point calibrated using on-board signals recorded in air saturated surface sea water and anoxic, dithionite-spiked bottom water at in situ temperature. Ex situ DOU fluxes across the sediment-water interface obtained were calculated from running average smoothed oxygen profiles using Fick's first law (Glud et al. (1994, doi:10.1016/0967-0637(94)90072-8).
Document Type: dataset
File Description: text/tab-separated-values, 42 data points
Language: English
Relation: Bodur, Yasemin V; Renaud, Paul E; Lins, Lidia; Da Costa Monteiro, Luana; Ambrose, William G Jr; Felden, Janine; Krumpen, Thomas; Wenzhöfer, Frank; Włodarska-Kowalczuk, Maria; Braeckman, Ulrike (2024): Weakened pelagic-benthic coupling on an Arctic outflow shelf (Northeast Greenland) suggested by benthic ecosystem changes. Elementa - Science of the Anthropocene, 12(1), 00005, https://doi.org/10.1525/elementa.2023.00005; https://doi.pangaea.de/10.1594/PANGAEA.959545; https://doi.org/10.1594/PANGAEA.959545
DOI: 10.1594/PANGAEA.959545
Availability: https://doi.pangaea.de/10.1594/PANGAEA.959545
https://doi.org/10.1594/PANGAEA.959545
Rights: CC-BY-4.0: Creative Commons Attribution 4.0 International ; Access constraints: unrestricted ; info:eu-repo/semantics/openAccess
Accession Number: edsbas.2F7673A8
Database: BASE
Description
Abstract:Ex situ diffusive oxygen uptake (DOU) at the sediment water interface was assessed on the Northeast Greenland shelf with R/V Polarstern during PS109 between September and October 2017 using a camera-equipped multiple corer (TV-MUC; core area 0.007 m²). Upon arrival on deck, part of the overlying water of three MUC cores was collected and stored separately at in situ temperature. The remaining overlying water was adjusted to 10 cm above the sediment by gently pushing the sediment upwards while avoiding a disturbance of the surface sediment. The cores were then placed in a temperature-controlled water bath in the ship-board laboratory which had been adjusted to the in-situ temperature at the seafloor (information was retrieved from ship-board sensors). A mangetic stirrer was deployed in order to homogenise the overlying water, and a small air pump gently aerated the water. DOU was assessed with 2 oxygen optodes (Pyroscience, Firesting; tip size 50 µm) mounted on an autonomous microprofiler module. Each core was measured with two microprofilers simultaneously, usually within 2h of sampling (except for stations 139, 85, 84 and 76, where the measurement times were >24h). The sensors were two-point calibrated using on-board signals recorded in air saturated surface sea water and anoxic, dithionite-spiked bottom water at in situ temperature. Ex situ DOU fluxes across the sediment-water interface obtained were calculated from running average smoothed oxygen profiles using Fick's first law (Glud et al. (1994, doi:10.1016/0967-0637(94)90072-8).
DOI:10.1594/PANGAEA.959545