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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Language: | English |
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Online Access: | https://oceanrep.geomar.de/id/eprint/47168/ https://oceanrep.geomar.de/id/eprint/47168/1/Worne.pdf https://doi.org/10.1016/j.epsl.2019.06.028 |
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ftoceanrep:oai:oceanrep.geomar.de:47168 2023-05-15T15:43:23+02:00 Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years Worne, Savannah Kender, Sev Swann, George E.A. Leng, Melanie J. Ravelo, Ana Christina 2019 text https://oceanrep.geomar.de/id/eprint/47168/ https://oceanrep.geomar.de/id/eprint/47168/1/Worne.pdf https://doi.org/10.1016/j.epsl.2019.06.028 en eng Elsevier https://oceanrep.geomar.de/id/eprint/47168/1/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. DOI 10.1016/j.epsl.2019.06.028 <https://doi.org/10.1016/j.epsl.2019.06.028>. doi:10.1016/j.epsl.2019.06.028 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1016/j.epsl.2019.06.028 2023-04-07T15:46:36Z 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Bering Sea Pacific Earth and Planetary Science Letters 522 87 97 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
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, Savannah Kender, Sev Swann, George E.A. Leng, Melanie J. Ravelo, Ana Christina |
spellingShingle |
Worne, Savannah Kender, Sev Swann, George E.A. Leng, Melanie J. Ravelo, Ana Christina Coupled climate and subarctic Pacific nutrient upwelling over the last 850,000 years |
author_facet |
Worne, Savannah Kender, Sev Swann, George E.A. Leng, Melanie J. Ravelo, Ana Christina |
author_sort |
Worne, Savannah |
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 |
https://oceanrep.geomar.de/id/eprint/47168/ https://oceanrep.geomar.de/id/eprint/47168/1/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 |
https://oceanrep.geomar.de/id/eprint/47168/1/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. DOI 10.1016/j.epsl.2019.06.028 <https://doi.org/10.1016/j.epsl.2019.06.028>. doi:10.1016/j.epsl.2019.06.028 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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_ |
1766377476983881728 |