Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea
Deep and bottom water from the Enderby Basin, which is strongly enriched in silicate, enters the Weddell Sea off Kapp Norvegia parallel to the coast. However, the bottom water in this region originates from the northern Weddell Sea, indicating a southward return flow of bottom water west of the prim...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1998
|
Subjects: | |
Online Access: | https://hdl.handle.net/11370/3a0c0f3f-2f44-4366-aa42-126deaaa945f https://research.rug.nl/en/publications/3a0c0f3f-2f44-4366-aa42-126deaaa945f https://doi.org/10.1016/S0967-0637(98)00029-6 https://pure.rug.nl/ws/files/10647288/1998DeepSeaRes1Hoppema.pdf |
id |
ftunigroningenpu:oai:pure.rug.nl:publications/3a0c0f3f-2f44-4366-aa42-126deaaa945f |
---|---|
record_format |
openpolar |
spelling |
ftunigroningenpu:oai:pure.rug.nl:publications/3a0c0f3f-2f44-4366-aa42-126deaaa945f 2024-02-11T10:09:22+01:00 Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea Hoppema, M Fahrbach, E Richter, K.-U de Baar, H.J.W. Kattner, G 1998 application/pdf https://hdl.handle.net/11370/3a0c0f3f-2f44-4366-aa42-126deaaa945f https://research.rug.nl/en/publications/3a0c0f3f-2f44-4366-aa42-126deaaa945f https://doi.org/10.1016/S0967-0637(98)00029-6 https://pure.rug.nl/ws/files/10647288/1998DeepSeaRes1Hoppema.pdf eng eng https://research.rug.nl/en/publications/3a0c0f3f-2f44-4366-aa42-126deaaa945f info:eu-repo/semantics/openAccess Hoppema , M , Fahrbach , E , Richter , K -U , de Baar , H J W & Kattner , G 1998 , ' Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea ' , Deep-Sea Research I , vol. 45 , no. 11 , pp. 1797-1817 . https://doi.org/10.1016/S0967-0637(98)00029-6 article 1998 ftunigroningenpu https://doi.org/10.1016/S0967-0637(98)00029-6 2024-01-17T23:06:21Z Deep and bottom water from the Enderby Basin, which is strongly enriched in silicate, enters the Weddell Sea off Kapp Norvegia parallel to the coast. However, the bottom water in this region originates from the northern Weddell Sea, indicating a southward return flow of bottom water west of the prime meridian. The eastern Weddell Sea margin was identified as the place where a significant silicate enrichment (at least 15 μmol kg-1) and a weak CO2 enrichment of the bottom water occurs, related to a regional recirculation cell. The deep and bottom water continue their course through the Weddell Sea along the base of the continental slope, where further to the west they are underridden by a thin layer of new, silicate-poor bottom water. A silicate maximum and weak TCO2 maximum are formed at the interface between deep and bottom water at approximately 4000 m. This silicate maximum occurs in the central Weddell Sea as well. This indicates an exchange of the deep water between the boundaries and the interior of the Weddell basin; the northwestern Weddell Sea was identified as an important site for this. Bottom layer enrichment of CO2 in the central Weddell Sea (3 μmol kg-1) is comparable to that in the eastern Weddell Sea, but silicate enrichment in the former is much less than in the latter. The extent of bottom layer enrichment suggests that about 2% of the primary production reaches the seafloor, supporting the view that the biological pump mechanism in this area is effectively transporting downward a significant amount of CO2. Article in Journal/Newspaper Weddell Sea University of Groningen research database Weddell Sea Weddell Weddell Basin ENVELOPE(32.019,32.019,-55.568,-55.568) Deep Sea Research Part I: Oceanographic Research Papers 45 11 1797 1817 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
description |
Deep and bottom water from the Enderby Basin, which is strongly enriched in silicate, enters the Weddell Sea off Kapp Norvegia parallel to the coast. However, the bottom water in this region originates from the northern Weddell Sea, indicating a southward return flow of bottom water west of the prime meridian. The eastern Weddell Sea margin was identified as the place where a significant silicate enrichment (at least 15 μmol kg-1) and a weak CO2 enrichment of the bottom water occurs, related to a regional recirculation cell. The deep and bottom water continue their course through the Weddell Sea along the base of the continental slope, where further to the west they are underridden by a thin layer of new, silicate-poor bottom water. A silicate maximum and weak TCO2 maximum are formed at the interface between deep and bottom water at approximately 4000 m. This silicate maximum occurs in the central Weddell Sea as well. This indicates an exchange of the deep water between the boundaries and the interior of the Weddell basin; the northwestern Weddell Sea was identified as an important site for this. Bottom layer enrichment of CO2 in the central Weddell Sea (3 μmol kg-1) is comparable to that in the eastern Weddell Sea, but silicate enrichment in the former is much less than in the latter. The extent of bottom layer enrichment suggests that about 2% of the primary production reaches the seafloor, supporting the view that the biological pump mechanism in this area is effectively transporting downward a significant amount of CO2. |
format |
Article in Journal/Newspaper |
author |
Hoppema, M Fahrbach, E Richter, K.-U de Baar, H.J.W. Kattner, G |
spellingShingle |
Hoppema, M Fahrbach, E Richter, K.-U de Baar, H.J.W. Kattner, G Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea |
author_facet |
Hoppema, M Fahrbach, E Richter, K.-U de Baar, H.J.W. Kattner, G |
author_sort |
Hoppema, M |
title |
Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea |
title_short |
Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea |
title_full |
Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea |
title_fullStr |
Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea |
title_full_unstemmed |
Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea |
title_sort |
enrichment of silicate and co2 and circulation of the bottom water in the weddell sea |
publishDate |
1998 |
url |
https://hdl.handle.net/11370/3a0c0f3f-2f44-4366-aa42-126deaaa945f https://research.rug.nl/en/publications/3a0c0f3f-2f44-4366-aa42-126deaaa945f https://doi.org/10.1016/S0967-0637(98)00029-6 https://pure.rug.nl/ws/files/10647288/1998DeepSeaRes1Hoppema.pdf |
long_lat |
ENVELOPE(32.019,32.019,-55.568,-55.568) |
geographic |
Weddell Sea Weddell Weddell Basin |
geographic_facet |
Weddell Sea Weddell Weddell Basin |
genre |
Weddell Sea |
genre_facet |
Weddell Sea |
op_source |
Hoppema , M , Fahrbach , E , Richter , K -U , de Baar , H J W & Kattner , G 1998 , ' Enrichment of silicate and CO2 and circulation of the bottom water in the Weddell Sea ' , Deep-Sea Research I , vol. 45 , no. 11 , pp. 1797-1817 . https://doi.org/10.1016/S0967-0637(98)00029-6 |
op_relation |
https://research.rug.nl/en/publications/3a0c0f3f-2f44-4366-aa42-126deaaa945f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/S0967-0637(98)00029-6 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
45 |
container_issue |
11 |
container_start_page |
1797 |
op_container_end_page |
1817 |
_version_ |
1790609244176777216 |