Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas
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....
Main Authors: | , , , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2014
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.830222 https://doi.org/10.1594/PANGAEA.830222 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.830222 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.830222 2023-05-15T15:43:55+02:00 Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas Max, Lars Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, Hartmut Mackensen, Andreas MEDIAN LATITUDE: 55.009805 * MEDIAN LONGITUDE: 159.249148 * SOUTH-BOUND LATITUDE: 49.375667 * WEST-BOUND LONGITUDE: 144.132533 * NORTH-BOUND LATITUDE: 60.126700 * EAST-BOUND LONGITUDE: -179.443500 * DATE/TIME START: 2002-07-08T00:05:00 * DATE/TIME END: 2009-09-22T00:06:00 2014-02-28 application/zip, 13 datasets https://doi.pangaea.de/10.1594/PANGAEA.830222 https://doi.org/10.1594/PANGAEA.830222 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.830222 https://doi.org/10.1594/PANGAEA.830222 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Max, Lars; Lembke-Jene, Lester; Riethdorf, Jan-Rainer; Tiedemann, Ralf; Nürnberg, Dirk; Kühn, Hartmut; Mackensen, Andreas (2014): Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation. Climate of the Past, 10(2), 419-605, https://doi.org/10.5194/cp-10-591-2014 AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.830222 https://doi.org/10.5194/cp-10-591-2014 2023-01-20T07:33:14Z 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 ka) 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 intermediate-depth North Pacific occurred during Heinrich Stadial 1 and the Younger Dryas, simultaneous to significant reductions in Atlantic Meridional Overturning Circulation. Concurrent changes in d13C 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 d13C 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. Dataset Bering Sea okhotsk sea Subarctic PANGAEA - Data Publisher for Earth & Environmental Science Bering Sea Okhotsk Pacific ENVELOPE(144.132533,-179.443500,60.126700,49.375667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
spellingShingle |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI Max, Lars Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, Hartmut Mackensen, Andreas Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas |
topic_facet |
AWI_Paleo Paleoenvironmental Reconstructions from Marine Sediments @ AWI |
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 ka) 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 intermediate-depth North Pacific occurred during Heinrich Stadial 1 and the Younger Dryas, simultaneous to significant reductions in Atlantic Meridional Overturning Circulation. Concurrent changes in d13C 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 d13C 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 |
Dataset |
author |
Max, Lars Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, Hartmut Mackensen, Andreas |
author_facet |
Max, Lars Lembke-Jene, Lester Riethdorf, Jan-Rainer Tiedemann, Ralf Nürnberg, Dirk Kühn, Hartmut Mackensen, Andreas |
author_sort |
Max, Lars |
title |
Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas |
title_short |
Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas |
title_full |
Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas |
title_fullStr |
Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas |
title_full_unstemmed |
Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas |
title_sort |
radiocarbon ages and stable isotope measurements on sediment cores of the subarctic pacific and its marginal seas |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.830222 https://doi.org/10.1594/PANGAEA.830222 |
op_coverage |
MEDIAN LATITUDE: 55.009805 * MEDIAN LONGITUDE: 159.249148 * SOUTH-BOUND LATITUDE: 49.375667 * WEST-BOUND LONGITUDE: 144.132533 * NORTH-BOUND LATITUDE: 60.126700 * EAST-BOUND LONGITUDE: -179.443500 * DATE/TIME START: 2002-07-08T00:05:00 * DATE/TIME END: 2009-09-22T00:06:00 |
long_lat |
ENVELOPE(144.132533,-179.443500,60.126700,49.375667) |
geographic |
Bering Sea Okhotsk Pacific |
geographic_facet |
Bering Sea Okhotsk Pacific |
genre |
Bering Sea okhotsk sea Subarctic |
genre_facet |
Bering Sea okhotsk sea Subarctic |
op_source |
Supplement to: Max, Lars; Lembke-Jene, Lester; Riethdorf, Jan-Rainer; Tiedemann, Ralf; Nürnberg, Dirk; Kühn, Hartmut; Mackensen, Andreas (2014): Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation. Climate of the Past, 10(2), 419-605, https://doi.org/10.5194/cp-10-591-2014 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.830222 https://doi.org/10.1594/PANGAEA.830222 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.830222 https://doi.org/10.5194/cp-10-591-2014 |
_version_ |
1766378134582591488 |