Respiration and dissolution in sediments of the western Atlantic
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 magni...
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1994
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.730420 2023-05-15T17:35:58+02:00 Respiration and dissolution in sediments of the western Atlantic Hales, Burke Emerson, Steven R Archer, David E 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 1994-01-13 application/zip, 33 datasets https://doi.pangaea.de/10.1594/PANGAEA.730420 https://doi.org/10.1594/PANGAEA.730420 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.730420 https://doi.org/10.1594/PANGAEA.730420 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hales, Burke; Emerson, Steven R; Archer, David E (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 ADEPD ADEPDCruises ADEPDCruises_H_11_BOTTLE ADEPDCruises_H_11_SC ADEPDCruises_H_5_BOTTLE ADEPDCruises_H_5_SC ADEPDCruises_H_6_BOTTLE ADEPDCruises_H_7_BOTTLE ADEPDCruises_H_7_SC ADEPDCruises_H_8_BOTTLE ADEPDCruises_H_8_SC ADEPDCruises_H_9_BOTTLE ADEPDCruises_H_9_SC Atlantic Data Base for Exchange Processes at the Deep Sea Floor BC Bottle Niskin Box corer H_11_BOTTLE H_11_SC H_11BC-no3 H_11BC-o2 H_11-me H_5_BOTTLE H_5_SC H_5BC-no3 H_5BC-o2 H_5BC-s H_5-me H_6_BOTTLE H_6BC-no3 H_6BC-o2 H_6BC-s H_7_BOTTLE H_7_SC H_7BC-o2 H_7BC-s H_7-me H_8_BOTTLE H_8_SC H_8BC-no3 H_8BC-o2 H_8BC-s H_8-me H_9_BOTTLE H_9_SC H_9BC-no3 H_9BC-o2 H_9BC-s H_9-me Dataset 1994 ftpangaea https://doi.org/10.1594/PANGAEA.730420 https://doi.org/10.1016/0967-0637(94)90050-7 2023-01-20T07:31:36Z 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. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-71.833333,-69.633333,39.616667,32.900000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ADEPD ADEPDCruises ADEPDCruises_H_11_BOTTLE ADEPDCruises_H_11_SC ADEPDCruises_H_5_BOTTLE ADEPDCruises_H_5_SC ADEPDCruises_H_6_BOTTLE ADEPDCruises_H_7_BOTTLE ADEPDCruises_H_7_SC ADEPDCruises_H_8_BOTTLE ADEPDCruises_H_8_SC ADEPDCruises_H_9_BOTTLE ADEPDCruises_H_9_SC Atlantic Data Base for Exchange Processes at the Deep Sea Floor BC Bottle Niskin Box corer H_11_BOTTLE H_11_SC H_11BC-no3 H_11BC-o2 H_11-me H_5_BOTTLE H_5_SC H_5BC-no3 H_5BC-o2 H_5BC-s H_5-me H_6_BOTTLE H_6BC-no3 H_6BC-o2 H_6BC-s H_7_BOTTLE H_7_SC H_7BC-o2 H_7BC-s H_7-me H_8_BOTTLE H_8_SC H_8BC-no3 H_8BC-o2 H_8BC-s H_8-me H_9_BOTTLE H_9_SC H_9BC-no3 H_9BC-o2 H_9BC-s H_9-me |
spellingShingle |
ADEPD ADEPDCruises ADEPDCruises_H_11_BOTTLE ADEPDCruises_H_11_SC ADEPDCruises_H_5_BOTTLE ADEPDCruises_H_5_SC ADEPDCruises_H_6_BOTTLE ADEPDCruises_H_7_BOTTLE ADEPDCruises_H_7_SC ADEPDCruises_H_8_BOTTLE ADEPDCruises_H_8_SC ADEPDCruises_H_9_BOTTLE ADEPDCruises_H_9_SC Atlantic Data Base for Exchange Processes at the Deep Sea Floor BC Bottle Niskin Box corer H_11_BOTTLE H_11_SC H_11BC-no3 H_11BC-o2 H_11-me H_5_BOTTLE H_5_SC H_5BC-no3 H_5BC-o2 H_5BC-s H_5-me H_6_BOTTLE H_6BC-no3 H_6BC-o2 H_6BC-s H_7_BOTTLE H_7_SC H_7BC-o2 H_7BC-s H_7-me H_8_BOTTLE H_8_SC H_8BC-no3 H_8BC-o2 H_8BC-s H_8-me H_9_BOTTLE H_9_SC H_9BC-no3 H_9BC-o2 H_9BC-s H_9-me Hales, Burke Emerson, Steven R Archer, David E Respiration and dissolution in sediments of the western Atlantic |
topic_facet |
ADEPD ADEPDCruises ADEPDCruises_H_11_BOTTLE ADEPDCruises_H_11_SC ADEPDCruises_H_5_BOTTLE ADEPDCruises_H_5_SC ADEPDCruises_H_6_BOTTLE ADEPDCruises_H_7_BOTTLE ADEPDCruises_H_7_SC ADEPDCruises_H_8_BOTTLE ADEPDCruises_H_8_SC ADEPDCruises_H_9_BOTTLE ADEPDCruises_H_9_SC Atlantic Data Base for Exchange Processes at the Deep Sea Floor BC Bottle Niskin Box corer H_11_BOTTLE H_11_SC H_11BC-no3 H_11BC-o2 H_11-me H_5_BOTTLE H_5_SC H_5BC-no3 H_5BC-o2 H_5BC-s H_5-me H_6_BOTTLE H_6BC-no3 H_6BC-o2 H_6BC-s H_7_BOTTLE H_7_SC H_7BC-o2 H_7BC-s H_7-me H_8_BOTTLE H_8_SC H_8BC-no3 H_8BC-o2 H_8BC-s H_8-me H_9_BOTTLE H_9_SC H_9BC-no3 H_9BC-o2 H_9BC-s H_9-me |
description |
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. |
format |
Dataset |
author |
Hales, Burke Emerson, Steven R Archer, David E |
author_facet |
Hales, Burke Emerson, Steven R Archer, David E |
author_sort |
Hales, Burke |
title |
Respiration and dissolution in sediments of the western Atlantic |
title_short |
Respiration and dissolution in sediments of the western Atlantic |
title_full |
Respiration and dissolution in sediments of the western Atlantic |
title_fullStr |
Respiration and dissolution in sediments of the western Atlantic |
title_full_unstemmed |
Respiration and dissolution in sediments of the western Atlantic |
title_sort |
respiration and dissolution in sediments of the western atlantic |
publisher |
PANGAEA |
publishDate |
1994 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.730420 https://doi.org/10.1594/PANGAEA.730420 |
op_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 |
long_lat |
ENVELOPE(-71.833333,-69.633333,39.616667,32.900000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Hales, Burke; Emerson, Steven R; Archer, David E (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 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.730420 https://doi.org/10.1594/PANGAEA.730420 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.730420 https://doi.org/10.1016/0967-0637(94)90050-7 |
_version_ |
1766135276339462144 |