Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years
High latitude deep water upwelling has the potential to control global climate over glacial timescales through the biological pump and ocean-atmosphere CO2 exchange. However, there is currently a lack of continuous long nutrient upwelling records with which to assess this mechanism. Here we present...
Published in: | Earth and Planetary Science Letters |
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ftnottinghtrentu:oai:irep.ntu.ac.uk:46923 2023-05-15T15:43:23+02:00 Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years Worne, S Kender, S Swann, GEA Leng, MJ Ravelo, AC 2019-09-15 text http://irep.ntu.ac.uk/id/eprint/46923/ http://irep.ntu.ac.uk/id/eprint/46923/1/1593263_Worne.pdf https://doi.org/10.1016/j.epsl.2019.06.028 en eng Elsevier http://irep.ntu.ac.uk/id/eprint/46923/1/1593263_Worne.pdf WORNE, S., KENDER, S., SWANN, G.E.A., LENG, M.J. and RAVELO, A.C., 2019. Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years. Earth and Planetary Science Letters, 522, pp. 87-97. ISSN 0012-821X doi:10.1016/j.epsl.2019.06.028 Article PeerReviewed 2019 ftnottinghtrentu https://doi.org/10.1016/j.epsl.2019.06.028 2022-08-25T22:07:28Z High latitude deep water upwelling has the potential to control global climate over glacial timescales through the biological pump and ocean-atmosphere CO2 exchange. However, there is currently a lack of continuous long nutrient upwelling records with which to assess this mechanism. Here we present geochemical proxy records for nutrient upwelling and glacial North Pacific Intermediate Water (GNPIW) formation in the Bering Sea over the past 850 kyr, which demonstrates that glacial periods were characterised by reduced nutrient upwelling, when global atmospheric CO2 and temperature were also lowered. We suggest that glacial expansion of sea ice in the Bering Sea, and the simultaneous expansion of low nutrient GNPIW, inhibited vertical mixing and nutrient supply across the subarctic Pacific Ocean. Our findings lend support to the suggestion that high latitude sea ice and the resultant intermediate water formation, modulated deep water upwelling and ocean-atmosphere CO2 exchange on glacial-interglacial timescales. Article in Journal/Newspaper Bering Sea Sea ice Subarctic Nottingham Trent University's Institutional Repository (IRep) Bering Sea Pacific Earth and Planetary Science Letters 522 87 97 |
institution |
Open Polar |
collection |
Nottingham Trent University's Institutional Repository (IRep) |
op_collection_id |
ftnottinghtrentu |
language |
English |
description |
High latitude deep water upwelling has the potential to control global climate over glacial timescales through the biological pump and ocean-atmosphere CO2 exchange. However, there is currently a lack of continuous long nutrient upwelling records with which to assess this mechanism. Here we present geochemical proxy records for nutrient upwelling and glacial North Pacific Intermediate Water (GNPIW) formation in the Bering Sea over the past 850 kyr, which demonstrates that glacial periods were characterised by reduced nutrient upwelling, when global atmospheric CO2 and temperature were also lowered. We suggest that glacial expansion of sea ice in the Bering Sea, and the simultaneous expansion of low nutrient GNPIW, inhibited vertical mixing and nutrient supply across the subarctic Pacific Ocean. Our findings lend support to the suggestion that high latitude sea ice and the resultant intermediate water formation, modulated deep water upwelling and ocean-atmosphere CO2 exchange on glacial-interglacial timescales. |
format |
Article in Journal/Newspaper |
author |
Worne, S Kender, S Swann, GEA Leng, MJ Ravelo, AC |
spellingShingle |
Worne, S Kender, S Swann, GEA Leng, MJ Ravelo, AC Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years |
author_facet |
Worne, S Kender, S Swann, GEA Leng, MJ Ravelo, AC |
author_sort |
Worne, S |
title |
Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years |
title_short |
Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years |
title_full |
Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years |
title_fullStr |
Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years |
title_full_unstemmed |
Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years |
title_sort |
coupled climate and subarctic pacific nutrient upwelling over the last 850,000 years |
publisher |
Elsevier |
publishDate |
2019 |
url |
http://irep.ntu.ac.uk/id/eprint/46923/ http://irep.ntu.ac.uk/id/eprint/46923/1/1593263_Worne.pdf https://doi.org/10.1016/j.epsl.2019.06.028 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea Sea ice Subarctic |
genre_facet |
Bering Sea Sea ice Subarctic |
op_relation |
http://irep.ntu.ac.uk/id/eprint/46923/1/1593263_Worne.pdf WORNE, S., KENDER, S., SWANN, G.E.A., LENG, M.J. and RAVELO, A.C., 2019. Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years. Earth and Planetary Science Letters, 522, pp. 87-97. ISSN 0012-821X doi:10.1016/j.epsl.2019.06.028 |
op_doi |
https://doi.org/10.1016/j.epsl.2019.06.028 |
container_title |
Earth and Planetary Science Letters |
container_volume |
522 |
container_start_page |
87 |
op_container_end_page |
97 |
_version_ |
1766377474240806912 |