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Hulth, Stefan; Blackburn, T H; Hall, Per (2012): Oxygen consumption in Arctic sediments. PANGAEA, https://doi.org/10.1594/PANGAEA.776753, Supplement to: Hulth, S et al. (1994): Arctic sediments (Svalbard): consumption and microdistribution of oxygen. Marine Chemistry, 46(3), 293-316, https://doi.org/10.1016/0304-4203(94)90084-1

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Abstract:
Total sediment oxygen consumption rates (TSOC or Jtot), measured during sediment-water incubations, and sediment oxygen microdistributions were studied at 16 stations in the Arctic Ocean (Svalbard area). The oxygen consumption rates ranged between 1.85 and 11.2 mmol m**-2 d**-1, and oxygen penetrated from 5.0 to >59 mm into the investigated sediments. Measured TSOC exceeded the calculated diffusive oxygen fluxes (Jdiff) by 1.1-4.8 times. Diffusive fluxes across the sediment-water interface were calculated using the whole measured microprofiles, rather than the linear oxygen gradient in the top sediment layer. The lack of a significant correlation between found abundances of bioirrigating meiofauna and high Jtot/Jdiff ratios as well as minor discrepancies in measured TSOC between replicate sediment cores, suggest molecular diffusion, not bioirrigation, to be the most important transport mechanism for oxygen across the sediment-water interface and within these sediments. The high ratios of Jtot/Jdiff obtained for some stations were therefore suggested to be caused by topographic factors, i.e. underestimation of the actual sediment surface area when one-dimensional diffusive fluxes were calculated, or sampling artifacts during core recovery from great water depths. Measured TSOC correlated to water depth raised to the -0.4 to -0.5 power (TSOC = water depth**-0.4 to -0.5) for all investigated stations, but they could be divided into two groups representing different geographical areas with different sediment oxygen consumption characteristics. The differences in TSOC between the two areas were suggested to reflect hydrographic factors (such as ice coverage and import/production of reactive particulate organic material) related to the dominating water mass (Atlantic or polar) in each of the two areas. The good correlation between TSOC and water depth**-0.4 to -0.5 rules out any of the stations investigated to be topographic depressions with pronounced enhanced sediment oxygen consumption.
Coverage:
Median Latitude: 79.124571 * Median Longitude: 23.000192 * South-bound Latitude: 75.983300 * West-bound Longitude: 5.916700 * North-bound Latitude: 81.650000 * East-bound Longitude: 34.866700
Date/Time Start: 1991-06-25T00:00:00 * Date/Time End: 1991-09-23T00:00:00
Event(s):
PS19/040 * Latitude: 76.600000 * Longitude: 34.866700 * Date/Time: 1991-09-23T00:00:00 * Elevation: -191.0 m * Campaign: ARK-VIII/2 (PS19 EPOS II) * Basis: Polarstern * Device: Multiple investigations (MULT)
PS19/045 * Latitude: 75.983300 * Longitude: 34.683300 * Date/Time: 1991-06-25T00:00:00 * Elevation: -240.0 m * Campaign: ARK-VIII/2 (PS19 EPOS II) * Basis: Polarstern * Device: Multiple investigations (MULT)
PS19/050 * Latitude: 77.550000 * Longitude: 19.100000 * Date/Time: 1991-06-27T00:00:00 * Elevation: -170.0 m * Campaign: ARK-VIII/2 (PS19 EPOS II) * Basis: Polarstern * Device: Multiple investigations (MULT)
Size:
20 datasets

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Datasets listed in this Collection

  1. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/040. https://doi.org/10.1594/PANGAEA.78597
  2. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/045. https://doi.org/10.1594/PANGAEA.78598
  3. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/050. https://doi.org/10.1594/PANGAEA.78599
  4. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/070. https://doi.org/10.1594/PANGAEA.78600
  5. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/078. https://doi.org/10.1594/PANGAEA.78601
  6. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/082. https://doi.org/10.1594/PANGAEA.78602
  7. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/084. https://doi.org/10.1594/PANGAEA.78603
  8. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/086. https://doi.org/10.1594/PANGAEA.78604
  9. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/098. https://doi.org/10.1594/PANGAEA.78605
  10. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/100. https://doi.org/10.1594/PANGAEA.78606
  11. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/101. https://doi.org/10.1594/PANGAEA.78607
  12. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/105. https://doi.org/10.1594/PANGAEA.78608
  13. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/108. https://doi.org/10.1594/PANGAEA.78609
  14. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/112. https://doi.org/10.1594/PANGAEA.78610
  15. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/119. https://doi.org/10.1594/PANGAEA.78611
  16. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/134. https://doi.org/10.1594/PANGAEA.78612
  17. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/143. https://doi.org/10.1594/PANGAEA.78613
  18. Hulth, S; Blackburn, TH; Hall, P (2002): Oxygen consumption at PS19/146. https://doi.org/10.1594/PANGAEA.78614
  19. Hulth, S; Blackburn, TH; Hall, P (1999): Oxygen flux at the sediment/water interface. https://doi.org/10.1594/PANGAEA.55151
  20. Hulth, S; Blackburn, TH; Hall, P (1999): Oxygen flux at the sediment/water interface. https://doi.org/10.1594/PANGAEA.55152