Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation
Today’s Sargasso Sea is nutrient starved, except for episodic upwelling events caused by wind-driven winter mixing and eddies. Enhanced diatom opal burial in Sargasso Sea sediments indicates that silicic acid, a limiting nutrient today, may have been more available in subsurface waters during Heinri...
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Online Access: | https://hdl.handle.net/1983/b8bbd16a-be5f-41cf-8295-16cea526d2d0 https://research-information.bris.ac.uk/en/publications/b8bbd16a-be5f-41cf-8295-16cea526d2d0 https://doi.org/10.1038/ncomms4107 https://research-information.bris.ac.uk/ws/files/32514224/hendry_nat_comms2014.pdf http://www.nature.com/ncomms/2014/140123/ncomms4107/full/ncomms4107.html |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/b8bbd16a-be5f-41cf-8295-16cea526d2d0 2024-04-28T08:30:00+00:00 Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation Hendry, Katharine Robinson, Laura F McManus, Jerry Hays, James 2014-01-23 application/pdf https://hdl.handle.net/1983/b8bbd16a-be5f-41cf-8295-16cea526d2d0 https://research-information.bris.ac.uk/en/publications/b8bbd16a-be5f-41cf-8295-16cea526d2d0 https://doi.org/10.1038/ncomms4107 https://research-information.bris.ac.uk/ws/files/32514224/hendry_nat_comms2014.pdf http://www.nature.com/ncomms/2014/140123/ncomms4107/full/ncomms4107.html eng eng https://research-information.bris.ac.uk/en/publications/b8bbd16a-be5f-41cf-8295-16cea526d2d0 info:eu-repo/semantics/openAccess Hendry , K , Robinson , L F , McManus , J & Hays , J 2014 , ' Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation ' , Nature Communications , vol. 5 , 3107 . https://doi.org/10.1038/ncomms4107 diatom silicon isotope North Atlantic Heinrich Stadial article 2014 ftubristolcris https://doi.org/10.1038/ncomms4107 2024-04-03T15:20:09Z Today’s Sargasso Sea is nutrient starved, except for episodic upwelling events caused by wind-driven winter mixing and eddies. Enhanced diatom opal burial in Sargasso Sea sediments indicates that silicic acid, a limiting nutrient today, may have been more available in subsurface waters during Heinrich Stadials, millennial-scale climate perturbations of the last glacial and deglaciation. Here we use the geochemistry of opal-forming organisms from different water depths to demonstrate changes in silicic acid supply and utilization during the most recent Heinrich Stadial. We suggest that during the early phase (17.5–18 ka), wind-driven upwelling replenished silicic acid to the subsurface, resulting in low Si utilization. By 17 ka, stratification reduced the surface silicic acid supply leading to increased Si utilization efficiency. This abrupt shift in Si cycling would have contributed to high regional carbon export efficiency during the recent Heinrich Stadial, despite being a period of increasing atmospheric CO2. Article in Journal/Newspaper North Atlantic University of Bristol: Bristol Research Nature Communications 5 1 |
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Open Polar |
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University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
diatom silicon isotope North Atlantic Heinrich Stadial |
spellingShingle |
diatom silicon isotope North Atlantic Heinrich Stadial Hendry, Katharine Robinson, Laura F McManus, Jerry Hays, James Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation |
topic_facet |
diatom silicon isotope North Atlantic Heinrich Stadial |
description |
Today’s Sargasso Sea is nutrient starved, except for episodic upwelling events caused by wind-driven winter mixing and eddies. Enhanced diatom opal burial in Sargasso Sea sediments indicates that silicic acid, a limiting nutrient today, may have been more available in subsurface waters during Heinrich Stadials, millennial-scale climate perturbations of the last glacial and deglaciation. Here we use the geochemistry of opal-forming organisms from different water depths to demonstrate changes in silicic acid supply and utilization during the most recent Heinrich Stadial. We suggest that during the early phase (17.5–18 ka), wind-driven upwelling replenished silicic acid to the subsurface, resulting in low Si utilization. By 17 ka, stratification reduced the surface silicic acid supply leading to increased Si utilization efficiency. This abrupt shift in Si cycling would have contributed to high regional carbon export efficiency during the recent Heinrich Stadial, despite being a period of increasing atmospheric CO2. |
format |
Article in Journal/Newspaper |
author |
Hendry, Katharine Robinson, Laura F McManus, Jerry Hays, James |
author_facet |
Hendry, Katharine Robinson, Laura F McManus, Jerry Hays, James |
author_sort |
Hendry, Katharine |
title |
Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation |
title_short |
Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation |
title_full |
Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation |
title_fullStr |
Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation |
title_full_unstemmed |
Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation |
title_sort |
silicon isotopes indicate enhanced carbon export efficiency in the north atlantic during deglaciation |
publishDate |
2014 |
url |
https://hdl.handle.net/1983/b8bbd16a-be5f-41cf-8295-16cea526d2d0 https://research-information.bris.ac.uk/en/publications/b8bbd16a-be5f-41cf-8295-16cea526d2d0 https://doi.org/10.1038/ncomms4107 https://research-information.bris.ac.uk/ws/files/32514224/hendry_nat_comms2014.pdf http://www.nature.com/ncomms/2014/140123/ncomms4107/full/ncomms4107.html |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Hendry , K , Robinson , L F , McManus , J & Hays , J 2014 , ' Silicon isotopes indicate enhanced carbon export efficiency in the North Atlantic during deglaciation ' , Nature Communications , vol. 5 , 3107 . https://doi.org/10.1038/ncomms4107 |
op_relation |
https://research-information.bris.ac.uk/en/publications/b8bbd16a-be5f-41cf-8295-16cea526d2d0 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/ncomms4107 |
container_title |
Nature Communications |
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5 |
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1 |
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1797588017511137280 |