Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation
Under modern conditions only North Pacific Intermediate Water is formed in the Northwest Pacific Ocean. This situation might have changed in the past. Recent studies with General Circulation Models indicate a switch to deep-water formation in the Northwest Pacific during Heinrich Stadial 1 (17.5–15....
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Copernicus Publications (EGU)
2014
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Online Access: | https://oceanrep.geomar.de/id/eprint/22482/ https://oceanrep.geomar.de/id/eprint/22482/1/cp-10-591-2014.pdf https://doi.org/10.5194/cp-10-591-2014 |
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ftoceanrep:oai:oceanrep.geomar.de:22482 2023-05-15T15:43:36+02:00 Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation Max, L. Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, H. Mackensen, A. 2014-03-21 text https://oceanrep.geomar.de/id/eprint/22482/ https://oceanrep.geomar.de/id/eprint/22482/1/cp-10-591-2014.pdf https://doi.org/10.5194/cp-10-591-2014 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/22482/1/cp-10-591-2014.pdf Max, L., Lembke-Jene, L., Riethdorf, J. R., Tiedemann, R., Nürnberg, D. , Kühn, H. and Mackensen, A. (2014) Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation. Open Access Climate of the Past, 10 . pp. 591-605. DOI 10.5194/cp-10-591-2014 <https://doi.org/10.5194/cp-10-591-2014>. doi:10.5194/cp-10-591-2014 cc_by info:eu-repo/semantics/openAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.5194/cp-10-591-2014 2023-04-07T15:10:58Z Under modern conditions only North Pacific Intermediate Water is formed in the Northwest Pacific Ocean. This situation might have changed in the past. Recent studies with General Circulation Models indicate a switch to deep-water formation in the Northwest Pacific during Heinrich Stadial 1 (17.5–15.0 kyr) of the last glacial termination. Reconstructions of past ventilation changes based on paleoceanographic proxy records are still insufficient to test whether a deglacial mode of deep-water formation in the North Pacific Ocean existed. Here we present deglacial ventilation records based on radiocarbon-derived ventilation ages in combination with epibenthic stable carbon isotopes from the Northwest Pacific including the Okhotsk Sea and Bering Sea, the two potential source regions for past North Pacific ventilation changes. Evidence for most rigorous ventilation of the mid-depth North Pacific occurred during Heinrich Stadial 1 and the Younger Dryas, simultaneous to significant reductions in Atlantic Meridional Overturning Circulation. Concurrent changes in δ13C and ventilation ages point to the Okhotsk Sea as driver of millennial-scale changes in North Pacific Intermediate Water ventilation during the last deglaciation. Our records additionally indicate that changes in the δ13C intermediate water (700–1750 m water depth) signature and radiocarbon-derived ventilation ages are in antiphase to those of the deep North Pacific Ocean (>2100 m water depth) during the last glacial termination. Thus, intermediate and deep-water masses of the Northwest Pacific have a differing ventilation history during the last deglaciation. Article in Journal/Newspaper Bering Sea okhotsk sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Bering Sea Okhotsk Pacific Climate of the Past 10 2 591 605 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Under modern conditions only North Pacific Intermediate Water is formed in the Northwest Pacific Ocean. This situation might have changed in the past. Recent studies with General Circulation Models indicate a switch to deep-water formation in the Northwest Pacific during Heinrich Stadial 1 (17.5–15.0 kyr) of the last glacial termination. Reconstructions of past ventilation changes based on paleoceanographic proxy records are still insufficient to test whether a deglacial mode of deep-water formation in the North Pacific Ocean existed. Here we present deglacial ventilation records based on radiocarbon-derived ventilation ages in combination with epibenthic stable carbon isotopes from the Northwest Pacific including the Okhotsk Sea and Bering Sea, the two potential source regions for past North Pacific ventilation changes. Evidence for most rigorous ventilation of the mid-depth North Pacific occurred during Heinrich Stadial 1 and the Younger Dryas, simultaneous to significant reductions in Atlantic Meridional Overturning Circulation. Concurrent changes in δ13C and ventilation ages point to the Okhotsk Sea as driver of millennial-scale changes in North Pacific Intermediate Water ventilation during the last deglaciation. Our records additionally indicate that changes in the δ13C intermediate water (700–1750 m water depth) signature and radiocarbon-derived ventilation ages are in antiphase to those of the deep North Pacific Ocean (>2100 m water depth) during the last glacial termination. Thus, intermediate and deep-water masses of the Northwest Pacific have a differing ventilation history during the last deglaciation. |
format |
Article in Journal/Newspaper |
author |
Max, L. Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, H. Mackensen, A. |
spellingShingle |
Max, L. Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, H. Mackensen, A. Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation |
author_facet |
Max, L. Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, H. Mackensen, A. |
author_sort |
Max, L. |
title |
Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation |
title_short |
Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation |
title_full |
Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation |
title_fullStr |
Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation |
title_full_unstemmed |
Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation |
title_sort |
pulses of enhanced north pacific intermediate water ventilation from the okhotsk sea and bering sea during the last deglaciation |
publisher |
Copernicus Publications (EGU) |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/22482/ https://oceanrep.geomar.de/id/eprint/22482/1/cp-10-591-2014.pdf https://doi.org/10.5194/cp-10-591-2014 |
geographic |
Bering Sea Okhotsk Pacific |
geographic_facet |
Bering Sea Okhotsk Pacific |
genre |
Bering Sea okhotsk sea |
genre_facet |
Bering Sea okhotsk sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/22482/1/cp-10-591-2014.pdf Max, L., Lembke-Jene, L., Riethdorf, J. R., Tiedemann, R., Nürnberg, D. , Kühn, H. and Mackensen, A. (2014) Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation. Open Access Climate of the Past, 10 . pp. 591-605. DOI 10.5194/cp-10-591-2014 <https://doi.org/10.5194/cp-10-591-2014>. doi:10.5194/cp-10-591-2014 |
op_rights |
cc_by info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-10-591-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
2 |
container_start_page |
591 |
op_container_end_page |
605 |
_version_ |
1766377777809850368 |