Chemistry of eastern tropical Atlantic porewater
Distributions of pore water O2, NO-2, NO-3, NH+4, Si(OH)4, PO[3-]4, Mn[2+], F-, and T.A. were determined at 15 stations in the eastern equatorial Atlantic. While overall profile characteristics are consistent with previous models of organic matter diagenesis, profile shapes suggest that a deep react...
Main Authors: | , , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
1989
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.730527 https://doi.org/10.1594/PANGAEA.730527 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.730527 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.730527 2023-05-15T17:32:00+02:00 Chemistry of eastern tropical Atlantic porewater Jahnke, Richard A Emerson, Steven R Reimers, Clare Schuffert, Jeffrey D Ruttenberg, K Archer, David E MEDIAN LATITUDE: 4.773141 * MEDIAN LONGITUDE: -20.244601 * SOUTH-BOUND LATITUDE: -7.970000 * WEST-BOUND LONGITUDE: -23.005000 * NORTH-BOUND LATITUDE: 14.687980 * EAST-BOUND LONGITUDE: -16.995000 * DATE/TIME START: 1989-11-01T00:00:00 * DATE/TIME END: 1989-11-01T00:00:00 1989-01-18 application/zip, 21 datasets https://doi.pangaea.de/10.1594/PANGAEA.730527 https://doi.org/10.1594/PANGAEA.730527 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.730527 https://doi.org/10.1594/PANGAEA.730527 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Jahnke, Richard A; Emerson, Steven R; Reimers, Clare; Schuffert, Jeffrey D; Ruttenberg, K; Archer, David E (1989): Benthic recycling of biogenic debris in the eastern tropical Atlantic Ocean. Geochimica et Cosmochimica Acta, 53(11), 2947-2960, https://doi.org/10.1016/0016-7037(89)90171-3 10BC35-2 11.5BC46-2 11BC39 11H43 12BC47-2 12BC48-1 12H50 13BCP56 14BC62 15BC64 1BC1-2 1BC4-4 2BC5-1 4BC14-2 4H10 4IMP11 6BC20-2 6BCP24 7BC25 7BC26-1 8BC27-3 BC BCP Box corer Box corer with microelectrode H IMP In situ oxygen microprofiler Punch core Silicon Cycling in the World Ocean SINOPS Dataset 1989 ftpangaea https://doi.org/10.1594/PANGAEA.730527 https://doi.org/10.1016/0016-7037(89)90171-3 2023-01-20T07:31:37Z Distributions of pore water O2, NO-2, NO-3, NH+4, Si(OH)4, PO[3-]4, Mn[2+], F-, and T.A. were determined at 15 stations in the eastern equatorial Atlantic. While overall profile characteristics are consistent with previous models of organic matter diagenesis, profile shapes suggest that a deep reaction layer, rich in organic C, is also present at many sites. While it is unlikely that the oxidation of organic C in this layer has had a major effect on the ocean C cycle, pore water profile shapes are significantly altered. Despite exposure to seawater SO[2-]4 concentrations for > 1000 years, decomposition of the organic matter in the layer appears to be restricted to oxic and suboxic processes. These results suggest major differences in organic carbon decomposition and preservation under oxic/suboxic and anoxic conditions. Present-day benthic fluxes are largest adjacent to the eastern boundary coastal upwelling region and similar in magnitude to values reported for the eastern Pacific. Preliminary estimates suggest that the benthic respiration in the eastern 1/3 of the North Atlantic south of 20°N may alone account for >20% of the total deep North Atlantic respiration. Combining these results with estimates of organic C burial and deep water-column decomposition suggests that this region is a major location of organic C input into the deep sea. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-23.005000,-16.995000,14.687980,-7.970000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
10BC35-2 11.5BC46-2 11BC39 11H43 12BC47-2 12BC48-1 12H50 13BCP56 14BC62 15BC64 1BC1-2 1BC4-4 2BC5-1 4BC14-2 4H10 4IMP11 6BC20-2 6BCP24 7BC25 7BC26-1 8BC27-3 BC BCP Box corer Box corer with microelectrode H IMP In situ oxygen microprofiler Punch core Silicon Cycling in the World Ocean SINOPS |
spellingShingle |
10BC35-2 11.5BC46-2 11BC39 11H43 12BC47-2 12BC48-1 12H50 13BCP56 14BC62 15BC64 1BC1-2 1BC4-4 2BC5-1 4BC14-2 4H10 4IMP11 6BC20-2 6BCP24 7BC25 7BC26-1 8BC27-3 BC BCP Box corer Box corer with microelectrode H IMP In situ oxygen microprofiler Punch core Silicon Cycling in the World Ocean SINOPS Jahnke, Richard A Emerson, Steven R Reimers, Clare Schuffert, Jeffrey D Ruttenberg, K Archer, David E Chemistry of eastern tropical Atlantic porewater |
topic_facet |
10BC35-2 11.5BC46-2 11BC39 11H43 12BC47-2 12BC48-1 12H50 13BCP56 14BC62 15BC64 1BC1-2 1BC4-4 2BC5-1 4BC14-2 4H10 4IMP11 6BC20-2 6BCP24 7BC25 7BC26-1 8BC27-3 BC BCP Box corer Box corer with microelectrode H IMP In situ oxygen microprofiler Punch core Silicon Cycling in the World Ocean SINOPS |
description |
Distributions of pore water O2, NO-2, NO-3, NH+4, Si(OH)4, PO[3-]4, Mn[2+], F-, and T.A. were determined at 15 stations in the eastern equatorial Atlantic. While overall profile characteristics are consistent with previous models of organic matter diagenesis, profile shapes suggest that a deep reaction layer, rich in organic C, is also present at many sites. While it is unlikely that the oxidation of organic C in this layer has had a major effect on the ocean C cycle, pore water profile shapes are significantly altered. Despite exposure to seawater SO[2-]4 concentrations for > 1000 years, decomposition of the organic matter in the layer appears to be restricted to oxic and suboxic processes. These results suggest major differences in organic carbon decomposition and preservation under oxic/suboxic and anoxic conditions. Present-day benthic fluxes are largest adjacent to the eastern boundary coastal upwelling region and similar in magnitude to values reported for the eastern Pacific. Preliminary estimates suggest that the benthic respiration in the eastern 1/3 of the North Atlantic south of 20°N may alone account for >20% of the total deep North Atlantic respiration. Combining these results with estimates of organic C burial and deep water-column decomposition suggests that this region is a major location of organic C input into the deep sea. |
format |
Dataset |
author |
Jahnke, Richard A Emerson, Steven R Reimers, Clare Schuffert, Jeffrey D Ruttenberg, K Archer, David E |
author_facet |
Jahnke, Richard A Emerson, Steven R Reimers, Clare Schuffert, Jeffrey D Ruttenberg, K Archer, David E |
author_sort |
Jahnke, Richard A |
title |
Chemistry of eastern tropical Atlantic porewater |
title_short |
Chemistry of eastern tropical Atlantic porewater |
title_full |
Chemistry of eastern tropical Atlantic porewater |
title_fullStr |
Chemistry of eastern tropical Atlantic porewater |
title_full_unstemmed |
Chemistry of eastern tropical Atlantic porewater |
title_sort |
chemistry of eastern tropical atlantic porewater |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.730527 https://doi.org/10.1594/PANGAEA.730527 |
op_coverage |
MEDIAN LATITUDE: 4.773141 * MEDIAN LONGITUDE: -20.244601 * SOUTH-BOUND LATITUDE: -7.970000 * WEST-BOUND LONGITUDE: -23.005000 * NORTH-BOUND LATITUDE: 14.687980 * EAST-BOUND LONGITUDE: -16.995000 * DATE/TIME START: 1989-11-01T00:00:00 * DATE/TIME END: 1989-11-01T00:00:00 |
long_lat |
ENVELOPE(-23.005000,-16.995000,14.687980,-7.970000) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Jahnke, Richard A; Emerson, Steven R; Reimers, Clare; Schuffert, Jeffrey D; Ruttenberg, K; Archer, David E (1989): Benthic recycling of biogenic debris in the eastern tropical Atlantic Ocean. Geochimica et Cosmochimica Acta, 53(11), 2947-2960, https://doi.org/10.1016/0016-7037(89)90171-3 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.730527 https://doi.org/10.1594/PANGAEA.730527 |
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.730527 https://doi.org/10.1016/0016-7037(89)90171-3 |
_version_ |
1766129899542675456 |