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Felden, Janine; Wenzhöfer, Frank; Braeckman, Ulrike (2024): Ex situ diffusive oxygen uptake of the Northeast Greenland (NEG) shelf sediments from POLARSTERN cruise PS109 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.959545

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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).
Keyword(s):
DOU; ex situ; microoptode; oxygen uptake
Supplement to:
Bodur, Yasemin V; Renaud, Paul E; Lins, Lidia; Da Costa Monteiro, Luana; Ambrose, William G Jr; Felden, Janine; Krumpen, Thomas; Wenzhöfer, Frank; Wlodarska-Kowalczuk, Maria; Braeckman, Ulrike (submitted): Weaker pelagic-benthic coupling leads to ecosystem change on an Arctic outflow shelf (Northeast Greenland). Elementa - Science of the Anthropocene
Project(s):
FRontiers in Arctic marine Monitoring (FRAM)
Funding:
Research Foundation of Flanders (FWO), grant/award no. 1201720N
The Research Council of Norway (RCN), grant/award no. 276730: The Nansen Legacy
Coverage:
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
Event(s):
PS109_19-4  * Latitude: 80.134150 * Longitude: -7.931730 * Date/Time: 2017-09-17T15:16:00 * Elevation: -315.0 m * Campaign: PS109 (ARK-XXXI/4) * Basis: Polarstern * Method/Device: Multicorer with television (TVMUC)
PS109_36-3  * Latitude: 80.312990 * Longitude: -10.086420 * Date/Time: 2017-09-19T06:55:00 * Elevation: -310.0 m * Campaign: PS109 (ARK-XXXI/4) * Basis: Polarstern * Method/Device: Multicorer with television (TVMUC)
PS109_45-3  * Latitude: 80.134290 * Longitude: -17.702960 * Date/Time: 2017-09-20T19:25:00 * Elevation: -160.0 m * Campaign: PS109 (ARK-XXXI/4) * Basis: Polarstern * Method/Device: Multicorer with television (TVMUC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventFelden, Janine
2 Latitude of eventLatitudeFelden, Janine
3 Longitude of eventLongitudeFelden, Janine
4 Date/Time of eventDate/TimeFelden, Janine
5 Elevation of eventElevationmFelden, Janine
6 Method/Device of eventMethod/DeviceFelden, Janine
7 Oxygen uptake, diffusiveDOUmmol/m2/dayFelden, JanineOxygen Logger (Firesting O2-C4) equipped with retractable needle type optodes (OXR50), Pyroscience, Firesting
8 NumberNoFelden, Janineof averaged oxygen sensor optode profiles
9 Standard deviationStd dev±Felden, Janineof averaged oxygen sensor optode profiles
10 CommentCommentFelden, Janine
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
42 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Latitude		3 
Longitude		4 
Date/Time		5 
Elevation [m]		6 
Method/Device		7 
DOU [mmol/m2/day]		8 
No		9 
Std dev [±]		10 
Comment
PS109_19-4 80.1342-7.93172017-09-17T15:16-315Multicorer with television-1.9590.85
PS109_36-3 80.3130-10.08642017-09-19T06:55-310Multicorer with television-2.05120.62
PS109_45-3 80.1343-17.70302017-09-20T19:25-160Multicorer with television-1.89100.48Was originally mislabeled as 46 not 45
PS109_76-1 79.6200-19.29152017-09-24T01:23-365Multicorer with television-1.56100.31
PS109_84-2 79.5063-19.31832017-09-24T23:03-309Multicorer with television-1.92120.58
PS109_85-1 79.5568-19.22732017-09-25T00:25-156Multicorer with television-2.05120.62Was originally mislabeled as 86 not 85
PS109_93-3 79.1841-17.14652017-09-26T13:37-69Multicorer with television-1.29100.32
PS109_105-1 78.4813-18.55622017-09-28T12:26-440Multicorer with television-1.4680.31
PS109_115-3 78.0332-16.52022017-09-29T23:33-502Multicorer with television-2.5350.61
PS109_122-1 77.9115-13.17432017-10-02T15:42-140Multicorer with television-2.21100.57
PS109_125-2 77.7986-13.62782017-10-03T01:10-391Multicorer with television-1.0080.19
PS109_139-2 76.7996-8.66042017-10-04T19:13-354Multicorer with television-1.3390.25Only profiles from 2 cores instead of 3. There were only 2 usable profiles for the 3rd and they showed a very high oxygen consumption - artefact?
PS109_154-1 76.4869-7.13202017-10-07T02:06-1176Multicorer with television-1.72100.35