The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean
The stable isotope composition of dissolved silicon in seawater (δ30SiDSi) was examined at 10 stations along the GEOVIDE section (GEOTRACES GA-01), spanning the North Atlantic Ocean (40–60°N) and Labrador Sea. Variations in δ30SiDSi below 500m were closely tied to the distribution of water masses. H...
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Copernicus Gesellschaft Mbh
2018
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ftarchimer:oai:archimer.ifremer.fr:56881 2023-05-15T15:08:36+02:00 The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean Sutton, Jill N. De Souza, Gregory F. Garcia-ibiliez, Maribel I. De La Rocha, Christina L. 2018-09 application/pdf https://archimer.ifremer.fr/doc/00457/56881/58744.pdf https://archimer.ifremer.fr/doc/00457/56881/58745.pdf https://archimer.ifremer.fr/doc/00457/56881/58746.pdf https://archimer.ifremer.fr/doc/00457/56881/58747.pdf https://doi.org/10.5194/bg-15-5663-2018 https://archimer.ifremer.fr/doc/00457/56881/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00457/56881/58744.pdf https://archimer.ifremer.fr/doc/00457/56881/58745.pdf https://archimer.ifremer.fr/doc/00457/56881/58746.pdf https://archimer.ifremer.fr/doc/00457/56881/58747.pdf doi:10.5194/bg-15-5663-2018 https://archimer.ifremer.fr/doc/00457/56881/ Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. info:eu-repo/semantics/openAccess restricted use CC-BY Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2018-09 , Vol. 15 , N. 18 , P. 5663-5676 text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.5194/bg-15-5663-2018 2021-09-23T20:31:34Z The stable isotope composition of dissolved silicon in seawater (δ30SiDSi) was examined at 10 stations along the GEOVIDE section (GEOTRACES GA-01), spanning the North Atlantic Ocean (40–60°N) and Labrador Sea. Variations in δ30SiDSi below 500m were closely tied to the distribution of water masses. Higher δ30SiDSi values are associated with intermediate and deep water masses of northern Atlantic or Arctic Ocean origin, whilst lower δ30SiDSi values are associated with DSi-rich waters sourced ultimately from the Southern Ocean. Correspondingly, the lowest δ30SiDSi values were observed in the deep and abyssal eastern North Atlantic, where dense southern-sourced waters dominate. The extent to which the spreading of water masses influences the δ30SiDSi distribution is marked clearly by Labrador Sea Water (LSW), whose high δ30SiDSi signature is visible not only within its region of formation within the Labrador and Irminger seas, but also throughout the mid-depth western and eastern North Atlantic Ocean. Both δ30SiDSi and hydrographic parameters document the circulation of LSW into the eastern North Atlantic, where it overlies southern-sourced Lower Deep Water. The GEOVIDE δ30SiDSi distribution thus provides a clear view of the direct interaction between subpolar/polar water masses of northern and southern origin, and allow examination of the extent to which these far-field signals influence the local δ30SiDSi distribution. Article in Journal/Newspaper Arctic Arctic Ocean Labrador Sea North Atlantic Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Arctic Ocean Southern Ocean Biogeosciences 15 18 5663 5676 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The stable isotope composition of dissolved silicon in seawater (δ30SiDSi) was examined at 10 stations along the GEOVIDE section (GEOTRACES GA-01), spanning the North Atlantic Ocean (40–60°N) and Labrador Sea. Variations in δ30SiDSi below 500m were closely tied to the distribution of water masses. Higher δ30SiDSi values are associated with intermediate and deep water masses of northern Atlantic or Arctic Ocean origin, whilst lower δ30SiDSi values are associated with DSi-rich waters sourced ultimately from the Southern Ocean. Correspondingly, the lowest δ30SiDSi values were observed in the deep and abyssal eastern North Atlantic, where dense southern-sourced waters dominate. The extent to which the spreading of water masses influences the δ30SiDSi distribution is marked clearly by Labrador Sea Water (LSW), whose high δ30SiDSi signature is visible not only within its region of formation within the Labrador and Irminger seas, but also throughout the mid-depth western and eastern North Atlantic Ocean. Both δ30SiDSi and hydrographic parameters document the circulation of LSW into the eastern North Atlantic, where it overlies southern-sourced Lower Deep Water. The GEOVIDE δ30SiDSi distribution thus provides a clear view of the direct interaction between subpolar/polar water masses of northern and southern origin, and allow examination of the extent to which these far-field signals influence the local δ30SiDSi distribution. |
format |
Article in Journal/Newspaper |
author |
Sutton, Jill N. De Souza, Gregory F. Garcia-ibiliez, Maribel I. De La Rocha, Christina L. |
spellingShingle |
Sutton, Jill N. De Souza, Gregory F. Garcia-ibiliez, Maribel I. De La Rocha, Christina L. The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean |
author_facet |
Sutton, Jill N. De Souza, Gregory F. Garcia-ibiliez, Maribel I. De La Rocha, Christina L. |
author_sort |
Sutton, Jill N. |
title |
The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean |
title_short |
The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean |
title_full |
The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean |
title_fullStr |
The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean |
title_full_unstemmed |
The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean |
title_sort |
silicon stable isotope distribution along the geovide section (geotraces ga-01) of the north atlantic ocean |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00457/56881/58744.pdf https://archimer.ifremer.fr/doc/00457/56881/58745.pdf https://archimer.ifremer.fr/doc/00457/56881/58746.pdf https://archimer.ifremer.fr/doc/00457/56881/58747.pdf https://doi.org/10.5194/bg-15-5663-2018 https://archimer.ifremer.fr/doc/00457/56881/ |
geographic |
Arctic Arctic Ocean Southern Ocean |
geographic_facet |
Arctic Arctic Ocean Southern Ocean |
genre |
Arctic Arctic Ocean Labrador Sea North Atlantic Southern Ocean |
genre_facet |
Arctic Arctic Ocean Labrador Sea North Atlantic Southern Ocean |
op_source |
Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2018-09 , Vol. 15 , N. 18 , P. 5663-5676 |
op_relation |
https://archimer.ifremer.fr/doc/00457/56881/58744.pdf https://archimer.ifremer.fr/doc/00457/56881/58745.pdf https://archimer.ifremer.fr/doc/00457/56881/58746.pdf https://archimer.ifremer.fr/doc/00457/56881/58747.pdf doi:10.5194/bg-15-5663-2018 https://archimer.ifremer.fr/doc/00457/56881/ |
op_rights |
Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-15-5663-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
18 |
container_start_page |
5663 |
op_container_end_page |
5676 |
_version_ |
1766339924690206720 |