Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin
Dissolved organic carbon (DOC) data are presented from three meridional transects conducted in the North Atlantic as part of the US Climate Variability (CLIVAR) Repeat Hydrography program in 2003. The hydrographic sections covered a latitudinal range of 6°S to 63°N along longitudes 20°W (CLIVAR line...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Language: | English |
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ftuloxford:oai:ora.ox.ac.uk:uuid:1b4e9582-c192-4065-926d-82ae83a67af9 2024-10-06T13:50:40+00:00 Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin Carlson, C Hansell, D Nelson, N Siegel, D Smethie, WM Khatiwala, S Meyers, M Halewood, E 2016-07-28 https://doi.org/10.1016/j.dsr2.2010.02.013 https://ora.ox.ac.uk/objects/uuid:1b4e9582-c192-4065-926d-82ae83a67af9 eng eng doi:10.1016/j.dsr2.2010.02.013 https://ora.ox.ac.uk/objects/uuid:1b4e9582-c192-4065-926d-82ae83a67af9 https://doi.org/10.1016/j.dsr2.2010.02.013 info:eu-repo/semantics/embargoedAccess Journal article 2016 ftuloxford https://doi.org/10.1016/j.dsr2.2010.02.013 2024-09-06T07:47:29Z Dissolved organic carbon (DOC) data are presented from three meridional transects conducted in the North Atlantic as part of the US Climate Variability (CLIVAR) Repeat Hydrography program in 2003. The hydrographic sections covered a latitudinal range of 6°S to 63°N along longitudes 20°W (CLIVAR line A16), 52°W (A20) and 66°W (A22). Over 3700 individual measurements reveal unprecedented detail in the DOC distribution and systematic variations in the mesopelagic and bathypelagic zones of the North Atlantic basin. Latitudinal gradients in DOC concentrations combined with published estimates of ventilation rates for the main thermocline and North Atlantic Deep Water (NADW) indicate a net DOC export rate of 0.081PgCyr-1 from the epipelagic zone into the mesopelagic and bathypelagic zones. Model II regression and multiple linear regression models applied to pairwise measures of DOC and chlorofluorocarbon (CFC-12) ventilation age, retrieved from major water masses within the main thermocline and NADW, indicate decay rates for exported DOC ranging from 0.13 to 0.94γmolkg-1yr-1, with higher DOC concentrations driving higher rates. The contribution of DOC oxidation to oxygen consumption ranged from 5 to 29% while mineralization of sinking biogenic particles drove the balance of the apparent oxygen utilization. © 2010 Elsevier Ltd. Article in Journal/Newspaper NADW North Atlantic Deep Water North Atlantic ORA - Oxford University Research Archive Deep Sea Research Part II: Topical Studies in Oceanography 57 16 1433 1445 |
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Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
description |
Dissolved organic carbon (DOC) data are presented from three meridional transects conducted in the North Atlantic as part of the US Climate Variability (CLIVAR) Repeat Hydrography program in 2003. The hydrographic sections covered a latitudinal range of 6°S to 63°N along longitudes 20°W (CLIVAR line A16), 52°W (A20) and 66°W (A22). Over 3700 individual measurements reveal unprecedented detail in the DOC distribution and systematic variations in the mesopelagic and bathypelagic zones of the North Atlantic basin. Latitudinal gradients in DOC concentrations combined with published estimates of ventilation rates for the main thermocline and North Atlantic Deep Water (NADW) indicate a net DOC export rate of 0.081PgCyr-1 from the epipelagic zone into the mesopelagic and bathypelagic zones. Model II regression and multiple linear regression models applied to pairwise measures of DOC and chlorofluorocarbon (CFC-12) ventilation age, retrieved from major water masses within the main thermocline and NADW, indicate decay rates for exported DOC ranging from 0.13 to 0.94γmolkg-1yr-1, with higher DOC concentrations driving higher rates. The contribution of DOC oxidation to oxygen consumption ranged from 5 to 29% while mineralization of sinking biogenic particles drove the balance of the apparent oxygen utilization. © 2010 Elsevier Ltd. |
format |
Article in Journal/Newspaper |
author |
Carlson, C Hansell, D Nelson, N Siegel, D Smethie, WM Khatiwala, S Meyers, M Halewood, E |
spellingShingle |
Carlson, C Hansell, D Nelson, N Siegel, D Smethie, WM Khatiwala, S Meyers, M Halewood, E Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin |
author_facet |
Carlson, C Hansell, D Nelson, N Siegel, D Smethie, WM Khatiwala, S Meyers, M Halewood, E |
author_sort |
Carlson, C |
title |
Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin |
title_short |
Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin |
title_full |
Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin |
title_fullStr |
Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin |
title_full_unstemmed |
Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin |
title_sort |
dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the north atlantic basin |
publishDate |
2016 |
url |
https://doi.org/10.1016/j.dsr2.2010.02.013 https://ora.ox.ac.uk/objects/uuid:1b4e9582-c192-4065-926d-82ae83a67af9 |
genre |
NADW North Atlantic Deep Water North Atlantic |
genre_facet |
NADW North Atlantic Deep Water North Atlantic |
op_relation |
doi:10.1016/j.dsr2.2010.02.013 https://ora.ox.ac.uk/objects/uuid:1b4e9582-c192-4065-926d-82ae83a67af9 https://doi.org/10.1016/j.dsr2.2010.02.013 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2010.02.013 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
57 |
container_issue |
16 |
container_start_page |
1433 |
op_container_end_page |
1445 |
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1812178796278710272 |