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 500 m were closely tied to the distribution of water masses....
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/74899/ https://ueaeprints.uea.ac.uk/id/eprint/74899/1/Published_Version.pdf https://doi.org/10.5194/bg-15-5663-2018 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:74899 2023-06-06T11:51:12+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. García-Ibáñez, Maribel I. De La Rocha, Christina L. 2018-09-21 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/74899/ https://ueaeprints.uea.ac.uk/id/eprint/74899/1/Published_Version.pdf https://doi.org/10.5194/bg-15-5663-2018 en eng https://ueaeprints.uea.ac.uk/id/eprint/74899/1/Published_Version.pdf Sutton, Jill N., De Souza, Gregory F., García-Ibáñez, Maribel I. and De La Rocha, Christina L. (2018) The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean. Biogeosciences, 15 (18). pp. 5663-5676. ISSN 1726-4189 doi:10.5194/bg-15-5663-2018 cc_by Article PeerReviewed 2018 ftuniveastangl https://doi.org/10.5194/bg-15-5663-2018 2023-04-13T22:32:09Z 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 500 m 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 University of East Anglia: UEA Digital Repository Arctic Arctic Ocean Southern Ocean Biogeosciences 15 18 5663 5676 |
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Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
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 500 m 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. García-Ibáñez, Maribel I. De La Rocha, Christina L. |
spellingShingle |
Sutton, Jill N. De Souza, Gregory F. García-Ibáñez, 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. García-Ibáñez, 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 |
publishDate |
2018 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/74899/ https://ueaeprints.uea.ac.uk/id/eprint/74899/1/Published_Version.pdf https://doi.org/10.5194/bg-15-5663-2018 |
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_relation |
https://ueaeprints.uea.ac.uk/id/eprint/74899/1/Published_Version.pdf Sutton, Jill N., De Souza, Gregory F., García-Ibáñez, Maribel I. and De La Rocha, Christina L. (2018) The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean. Biogeosciences, 15 (18). pp. 5663-5676. ISSN 1726-4189 doi:10.5194/bg-15-5663-2018 |
op_rights |
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_ |
1767956924874096640 |