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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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/295469 2023-05-15T15:08:27+02:00 The silicon stable isotope distribution along the GEOVIDE section (GEOTRACES GA-01) of the North Atlantic Ocean Sutton, Jill N. Souza, Gregory F. de Garcia-Ibiliez, Maribel I. De La Rocha, Christina L. 2018 application/application/pdf https://hdl.handle.net/20.500.11850/295469 https://doi.org/10.3929/ethz-b-000295469 en eng Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-5663-2018 info:eu-repo/semantics/altIdentifier/wos/000445272300001 http://hdl.handle.net/20.500.11850/295469 doi:10.3929/ethz-b-000295469 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY Biogeosciences, 15 (18) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftethz https://doi.org/20.500.11850/295469 https://doi.org/10.3929/ethz-b-000295469 https://doi.org/10.5194/bg-15-5663-2018 2022-04-25T13:36:27Z 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. ISSN:1726-4170 ISSN:1726-4170 Article in Journal/Newspaper Arctic Arctic Ocean Labrador Sea North Atlantic Southern Ocean ETH Zürich Research Collection Arctic Arctic Ocean Southern Ocean |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
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. ISSN:1726-4170 ISSN:1726-4170 |
format |
Article in Journal/Newspaper |
author |
Sutton, Jill N. Souza, Gregory F. de Garcia-Ibiliez, Maribel I. De La Rocha, Christina L. |
spellingShingle |
Sutton, Jill N. Souza, Gregory F. de 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. Souza, Gregory F. de 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 |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11850/295469 https://doi.org/10.3929/ethz-b-000295469 |
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, 15 (18) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-5663-2018 info:eu-repo/semantics/altIdentifier/wos/000445272300001 http://hdl.handle.net/20.500.11850/295469 doi:10.3929/ethz-b-000295469 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/295469 https://doi.org/10.3929/ethz-b-000295469 https://doi.org/10.5194/bg-15-5663-2018 |
_version_ |
1766339814398885888 |