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Hales, Burke; Emerson, Steven R; Archer, David E (1994): Respiration and dissolution in sediments of the western Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.730420, Supplement to: Hales, B et al. (1994): Respiration and dissolution in the sediments of the western North Atlantic: estimates from models of in situ microelectrode measurements of porewater oxygen and pH. Deep Sea Research Part I: Oceanographic Research Papers, 41(4), 695-719, https://doi.org/10.1016/0967-0637(94)90050-7

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Abstract:
We present in situ microelectrode measurements of sediment formation factor and porewater oxygen and pH from six stations in the North Atlantic varying in depth from 2159 to 5380 m. A numerical model of the oxygen data indicates that fluxes of oxygen to the sediments are as much as an order of magnitude higher than benthic chamber flux measurements previously reported in the same area. Model results require dissolution driven by metabolic CO2 production within the sediments to explain the pH data; even at the station with the most undersaturated bottom waters >60% of the calcite dissolution occurs in response to metabolic CO2. Aragonite dissolution alone cannot provide the observed buffering of porewater pH, even at the shallowest station. A sensitivity test of the model that accounts for uncertainties in the bottom water saturation state and the stoichiometry between oxygen consumption and CO2 production during respiration constrains the dissolution rate constant for calcite to between 3 and 30% day**-1, in agreement with earlier in situ determinations of the rate constant. Model results predict that over 35% of the calcium carbonate rain to these sediments dissolves at all stations, confirmed by sediment trap and CaCO3 accumulation data.
Coverage:
Median Latitude: 35.888889 * Median Longitude: -70.693838 * South-bound Latitude: 32.900000 * West-bound Longitude: -71.833333 * North-bound Latitude: 39.616667 * East-bound Longitude: -69.633333
Date/Time Start: 1989-09-01T00:00:00 * Date/Time End: 1989-10-01T00:00:00
Event(s):
ADEPDCruises_H_11_BOTTLE (H_11_BOTTLE) * Latitude: 32.900000 * Longitude: -69.633333 * Date/Time: 1989-10-01T00:00:00 * Elevation: -5380.0 m * Campaign: ADEPDCruises * Device: Bottle, Niskin (NIS)
ADEPDCruises_H_11_SC (H_11_SC) * Latitude: 32.900000 * Longitude: -69.633333 * Date/Time: 1989-10-01T00:00:00 * Elevation: -5380.0 m * Campaign: ADEPDCruises * Device: Soutar corer (SC)
ADEPDCruises_H_5_BOTTLE (H_5_BOTTLE) * Latitude: 39.616667 * Longitude: -69.666667 * Date/Time: 1989-10-01T00:00:00 * Elevation: -2159.0 m * Campaign: ADEPDCruises * Device: Bottle, Niskin (NIS)
Size:
33 datasets

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Datasets listed in this publication series

  1. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_11-me. https://doi.org/10.1594/PANGAEA.399733
  2. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_11BC-no3. https://doi.org/10.1594/PANGAEA.399734
  3. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_11BC-o2. https://doi.org/10.1594/PANGAEA.399735
  4. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_5-me. https://doi.org/10.1594/PANGAEA.399736
  5. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_5BC-no3. https://doi.org/10.1594/PANGAEA.399737
  6. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_5BC-o2. https://doi.org/10.1594/PANGAEA.399738
  7. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_5BC-s. https://doi.org/10.1594/PANGAEA.399739
  8. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_6BC-no3. https://doi.org/10.1594/PANGAEA.399740
  9. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_6BC-o2. https://doi.org/10.1594/PANGAEA.399741
  10. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_6BC-s. https://doi.org/10.1594/PANGAEA.399742
  11. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_7-me. https://doi.org/10.1594/PANGAEA.399743
  12. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_7BC-o2. https://doi.org/10.1594/PANGAEA.399744
  13. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_7BC-s. https://doi.org/10.1594/PANGAEA.399745
  14. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_8-me. https://doi.org/10.1594/PANGAEA.399746
  15. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_8BC-no3. https://doi.org/10.1594/PANGAEA.399747
  16. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_8BC-o2. https://doi.org/10.1594/PANGAEA.399748
  17. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_8BC-s. https://doi.org/10.1594/PANGAEA.399749
  18. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_9-me. https://doi.org/10.1594/PANGAEA.399750
  19. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_9BC-no3. https://doi.org/10.1594/PANGAEA.399751
  20. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_9BC-o2. https://doi.org/10.1594/PANGAEA.399752
  21. Hales, B; Emerson, SR; Archer, DE (1994): Geochemistry of surface sediment profile H_9BC-s. https://doi.org/10.1594/PANGAEA.399753
  22. Hales, B; Emerson, SR; Archer, DE (1994): Oxygen consumption of H_11_SC. https://doi.org/10.1594/PANGAEA.77951
  23. Hales, B; Emerson, SR; Archer, DE (1994): Oxygen consumption of H_5_SC. https://doi.org/10.1594/PANGAEA.77947
  24. Hales, B; Emerson, SR; Archer, DE (1994): Oxygen consumption of H_7_SC. https://doi.org/10.1594/PANGAEA.77948
  25. Hales, B; Emerson, SR; Archer, DE (1994): Oxygen consumption of H_8_SC. https://doi.org/10.1594/PANGAEA.77949
  26. Hales, B; Emerson, SR; Archer, DE (1994): Oxygen consumption of H_9_SC. https://doi.org/10.1594/PANGAEA.77950
  27. Hales, B; Emerson, SR; Archer, DE (1994): Oxygen flux in surface sediments from the North Atlantic. https://doi.org/10.1594/PANGAEA.55090
  28. Hales, B; Emerson, SR; Archer, DE (1994): Water chemistry of H_11_BOTTLE. https://doi.org/10.1594/PANGAEA.77946
  29. Hales, B; Emerson, SR; Archer, DE (1994): Water chemistry of H_5_BOTTLE. https://doi.org/10.1594/PANGAEA.77941
  30. Hales, B; Emerson, SR; Archer, DE (1994): Water chemistry of H_6_BOTTLE. https://doi.org/10.1594/PANGAEA.77942
  31. Hales, B; Emerson, SR; Archer, DE (1994): Water chemistry of H_7_BOTTLE. https://doi.org/10.1594/PANGAEA.77943
  32. Hales, B; Emerson, SR; Archer, DE (1994): Water chemistry of H_8_BOTTLE. https://doi.org/10.1594/PANGAEA.77944
  33. Hales, B; Emerson, SR; Archer, DE (1994): Water chemistry of H_9_BOTTLE. https://doi.org/10.1594/PANGAEA.77945