Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions
We provide high-resolution foraminiferal stable carbon isotope (delta C-13) records from the subarctic Pacific and Eastern Equatorial Pacific (EEP) to investigate circulation dynamics between the extratropical and tropical North Pacific during the past 60 kyr. We measured the delta C-13 composition...
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Amer Geophysical Union
2017
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ftarchimer:oai:archimer.ifremer.fr:53196 2023-05-15T15:43:52+02:00 Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions Max, L. Rippert, N. Lembke-jene, L. Mackensen, A. Nürnberg, D. Tiedemann, R. 2017-01 application/pdf https://archimer.ifremer.fr/doc/00420/53196/54997.pdf https://archimer.ifremer.fr/doc/00420/53196/54998.xls https://archimer.ifremer.fr/doc/00420/53196/54999.xls https://doi.org/10.1002/2016PA002994 https://archimer.ifremer.fr/doc/00420/53196/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00420/53196/54997.pdf https://archimer.ifremer.fr/doc/00420/53196/54998.xls https://archimer.ifremer.fr/doc/00420/53196/54999.xls doi:10.1002/2016PA002994 https://archimer.ifremer.fr/doc/00420/53196/ 2016. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use Paleoceanography (0883-8305) (Amer Geophysical Union), 2017-01 , Vol. 32 , N. 1 , P. 41-55 text Publication info:eu-repo/semantics/article 2017 ftarchimer https://doi.org/10.1002/2016PA002994 2021-09-23T20:30:24Z We provide high-resolution foraminiferal stable carbon isotope (delta C-13) records from the subarctic Pacific and Eastern Equatorial Pacific (EEP) to investigate circulation dynamics between the extratropical and tropical North Pacific during the past 60 kyr. We measured the delta C-13 composition of the epibenthic foraminiferal species Cibicides lobatulus from a shallow sediment core recovered from the western Bering Sea (SO201-2-101KL; 58 degrees 52.52' N, 170 degrees 41.45' E; 630 m water depth) to reconstruct past ventilation changes close to the source region of Glacial North Pacific Intermediate Water (GNPIW). Information regarding glacial changes in the delta C-13 of subthermocline water masses in the EEP is derived from the deep-dwelling planktonic foraminifera Globorotaloides hexagonus at ODP Site 1240 (00 degrees 01.31' N, 82 degrees 27.76' W; 2921m water depth). Apparent similarities in the long-term evolution of delta C-13 between GNPIW, intermediate waters in the eastern tropical North Pacific and subthermocline water masses in the EEP suggest the expansion of relatively delta C-13-depleted, nutrient-enriched, and northern sourced intermediate waters to the equatorial Pacific under glacial conditions. Further, it appears that additional influence of GNPIW to the tropical Pacific is consistent with changes in nutrient distribution and biological productivity in surface waters of the glacial EEP. Our findings highlight potential links between North Pacific mid-depth circulation changes, nutrient cycling, and biological productivity in the equatorial Pacific under glacial boundary conditions. Article in Journal/Newspaper Bering Sea Planktonic foraminifera Subarctic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Bering Sea Pacific Paleoceanography 32 1 41 55 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
We provide high-resolution foraminiferal stable carbon isotope (delta C-13) records from the subarctic Pacific and Eastern Equatorial Pacific (EEP) to investigate circulation dynamics between the extratropical and tropical North Pacific during the past 60 kyr. We measured the delta C-13 composition of the epibenthic foraminiferal species Cibicides lobatulus from a shallow sediment core recovered from the western Bering Sea (SO201-2-101KL; 58 degrees 52.52' N, 170 degrees 41.45' E; 630 m water depth) to reconstruct past ventilation changes close to the source region of Glacial North Pacific Intermediate Water (GNPIW). Information regarding glacial changes in the delta C-13 of subthermocline water masses in the EEP is derived from the deep-dwelling planktonic foraminifera Globorotaloides hexagonus at ODP Site 1240 (00 degrees 01.31' N, 82 degrees 27.76' W; 2921m water depth). Apparent similarities in the long-term evolution of delta C-13 between GNPIW, intermediate waters in the eastern tropical North Pacific and subthermocline water masses in the EEP suggest the expansion of relatively delta C-13-depleted, nutrient-enriched, and northern sourced intermediate waters to the equatorial Pacific under glacial conditions. Further, it appears that additional influence of GNPIW to the tropical Pacific is consistent with changes in nutrient distribution and biological productivity in surface waters of the glacial EEP. Our findings highlight potential links between North Pacific mid-depth circulation changes, nutrient cycling, and biological productivity in the equatorial Pacific under glacial boundary conditions. |
format |
Article in Journal/Newspaper |
author |
Max, L. Rippert, N. Lembke-jene, L. Mackensen, A. Nürnberg, D. Tiedemann, R. |
spellingShingle |
Max, L. Rippert, N. Lembke-jene, L. Mackensen, A. Nürnberg, D. Tiedemann, R. Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions |
author_facet |
Max, L. Rippert, N. Lembke-jene, L. Mackensen, A. Nürnberg, D. Tiedemann, R. |
author_sort |
Max, L. |
title |
Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions |
title_short |
Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions |
title_full |
Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions |
title_fullStr |
Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions |
title_full_unstemmed |
Evidence for enhanced convection of North Pacific Intermediate Water to the low-latitude Pacific under glacial conditions |
title_sort |
evidence for enhanced convection of north pacific intermediate water to the low-latitude pacific under glacial conditions |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://archimer.ifremer.fr/doc/00420/53196/54997.pdf https://archimer.ifremer.fr/doc/00420/53196/54998.xls https://archimer.ifremer.fr/doc/00420/53196/54999.xls https://doi.org/10.1002/2016PA002994 https://archimer.ifremer.fr/doc/00420/53196/ |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea Planktonic foraminifera Subarctic |
genre_facet |
Bering Sea Planktonic foraminifera Subarctic |
op_source |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2017-01 , Vol. 32 , N. 1 , P. 41-55 |
op_relation |
https://archimer.ifremer.fr/doc/00420/53196/54997.pdf https://archimer.ifremer.fr/doc/00420/53196/54998.xls https://archimer.ifremer.fr/doc/00420/53196/54999.xls doi:10.1002/2016PA002994 https://archimer.ifremer.fr/doc/00420/53196/ |
op_rights |
2016. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2016PA002994 |
container_title |
Paleoceanography |
container_volume |
32 |
container_issue |
1 |
container_start_page |
41 |
op_container_end_page |
55 |
_version_ |
1766378082343583744 |