Sedimentology and Nd isotope ratios of sediment core PS72/410-1
The freshwater budget of the Arctic Ocean is a key component governing the deep water formation in the North Atlantic and the global climate system. We analyzed the isotopic composition of neodymium (epsilon-Nd) in authigenic phases of marine sediments on the Mendeleev Ridge in the western Arctic Oc...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.817616 2024-09-15T17:51:37+00:00 Sedimentology and Nd isotope ratios of sediment core PS72/410-1 Jang, Kwangchul Han, Yeongcheol Huh, Youngsook Nam, Seung-Il Stein, Ruediger Mackensen, Andreas Matthiessen, Jens MEDIAN LATITUDE: 81.194036 * MEDIAN LONGITUDE: -179.923988 * SOUTH-BOUND LATITUDE: 79.592750 * WEST-BOUND LONGITUDE: 144.166200 * NORTH-BOUND LATITUDE: 87.529300 * EAST-BOUND LONGITUDE: -172.501583 * DATE/TIME START: 1991-09-02T00:00:00 * DATE/TIME END: 2008-09-23T23:20:00 2013 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.817616 https://doi.org/10.1594/PANGAEA.817616 en eng PANGAEA Matthiessen, Jens (2013): Linescanner images of sediment core PS72/410-1 [dataset]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.817509 https://doi.pangaea.de/10.1594/PANGAEA.817616 https://doi.org/10.1594/PANGAEA.817616 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Jang, Kwangchul; Han, Yeongcheol; Huh, Youngsook; Nam, Seung-Il; Stein, Ruediger; Mackensen, Andreas; Matthiessen, Jens (2013): Glacial freshwater discharge events recorded by authigenic neodymium isotopes in sediments from the Mendeleev Ridge, western Arctic Ocean. Earth and Planetary Science Letters, 369-370, 148-157, https://doi.org/10.1016/j.epsl.2013.03.018 Arctic Ocean ARK-XXIII/3 AWI_Paleo Giant box corer GKG Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS72 PS72/410-1 dataset publication series 2013 ftpangaea https://doi.org/10.1594/PANGAEA.81761610.1016/j.epsl.2013.03.01810.1594/PANGAEA.817509 2024-07-24T02:31:21Z The freshwater budget of the Arctic Ocean is a key component governing the deep water formation in the North Atlantic and the global climate system. We analyzed the isotopic composition of neodymium (epsilon-Nd) in authigenic phases of marine sediments on the Mendeleev Ridge in the western Arctic Ocean spanning an estimated time interval from present to about 75 ka BP. This continuous record was used to reconstruct the epsilon-Nd of the polar deep water (PDW) and changes in freshwater sources to the PDW through time. Three deviations in epsilon-Nd from a long term average of -10.2 were identified at estimated 46-51, 35-39 and 13-21 ka BP. The estimated 46-51 ka BP event can be traced to bursting of ice-dammed lakes accompanying the collapse of the Barents-Kara Ice Sheet, which would have released radiogenic Nd to the eastern Arctic Ocean. The cyclonic surface circulation in the eastern Arctic Ocean must have been stronger than at present for the event to be recorded on the Mendeleev Ridge. For the 35-39 and 13-21 ka BP events, it is likely that the Laurentide Ice Sheet (LIS) supplied the unradiogenic freshwater. The configuration of the anticyclonic circulation in the western Arctic was probably similar to today or expanded eastward. Our simple mass balance calculations suggest that large amounts of freshwater were released but due to significant deep water formation within the Arctic Ocean, the effect on the formation of NADW was probably minor. Other/Unknown Material Arctic Arctic Ocean Ice Sheet NADW North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(144.166200,-172.501583,87.529300,79.592750) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Arctic Ocean ARK-XXIII/3 AWI_Paleo Giant box corer GKG Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS72 PS72/410-1 |
spellingShingle |
Arctic Ocean ARK-XXIII/3 AWI_Paleo Giant box corer GKG Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS72 PS72/410-1 Jang, Kwangchul Han, Yeongcheol Huh, Youngsook Nam, Seung-Il Stein, Ruediger Mackensen, Andreas Matthiessen, Jens Sedimentology and Nd isotope ratios of sediment core PS72/410-1 |
topic_facet |
Arctic Ocean ARK-XXIII/3 AWI_Paleo Giant box corer GKG Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS72 PS72/410-1 |
description |
The freshwater budget of the Arctic Ocean is a key component governing the deep water formation in the North Atlantic and the global climate system. We analyzed the isotopic composition of neodymium (epsilon-Nd) in authigenic phases of marine sediments on the Mendeleev Ridge in the western Arctic Ocean spanning an estimated time interval from present to about 75 ka BP. This continuous record was used to reconstruct the epsilon-Nd of the polar deep water (PDW) and changes in freshwater sources to the PDW through time. Three deviations in epsilon-Nd from a long term average of -10.2 were identified at estimated 46-51, 35-39 and 13-21 ka BP. The estimated 46-51 ka BP event can be traced to bursting of ice-dammed lakes accompanying the collapse of the Barents-Kara Ice Sheet, which would have released radiogenic Nd to the eastern Arctic Ocean. The cyclonic surface circulation in the eastern Arctic Ocean must have been stronger than at present for the event to be recorded on the Mendeleev Ridge. For the 35-39 and 13-21 ka BP events, it is likely that the Laurentide Ice Sheet (LIS) supplied the unradiogenic freshwater. The configuration of the anticyclonic circulation in the western Arctic was probably similar to today or expanded eastward. Our simple mass balance calculations suggest that large amounts of freshwater were released but due to significant deep water formation within the Arctic Ocean, the effect on the formation of NADW was probably minor. |
format |
Other/Unknown Material |
author |
Jang, Kwangchul Han, Yeongcheol Huh, Youngsook Nam, Seung-Il Stein, Ruediger Mackensen, Andreas Matthiessen, Jens |
author_facet |
Jang, Kwangchul Han, Yeongcheol Huh, Youngsook Nam, Seung-Il Stein, Ruediger Mackensen, Andreas Matthiessen, Jens |
author_sort |
Jang, Kwangchul |
title |
Sedimentology and Nd isotope ratios of sediment core PS72/410-1 |
title_short |
Sedimentology and Nd isotope ratios of sediment core PS72/410-1 |
title_full |
Sedimentology and Nd isotope ratios of sediment core PS72/410-1 |
title_fullStr |
Sedimentology and Nd isotope ratios of sediment core PS72/410-1 |
title_full_unstemmed |
Sedimentology and Nd isotope ratios of sediment core PS72/410-1 |
title_sort |
sedimentology and nd isotope ratios of sediment core ps72/410-1 |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.817616 https://doi.org/10.1594/PANGAEA.817616 |
op_coverage |
MEDIAN LATITUDE: 81.194036 * MEDIAN LONGITUDE: -179.923988 * SOUTH-BOUND LATITUDE: 79.592750 * WEST-BOUND LONGITUDE: 144.166200 * NORTH-BOUND LATITUDE: 87.529300 * EAST-BOUND LONGITUDE: -172.501583 * DATE/TIME START: 1991-09-02T00:00:00 * DATE/TIME END: 2008-09-23T23:20:00 |
long_lat |
ENVELOPE(144.166200,-172.501583,87.529300,79.592750) |
genre |
Arctic Arctic Ocean Ice Sheet NADW North Atlantic |
genre_facet |
Arctic Arctic Ocean Ice Sheet NADW North Atlantic |
op_source |
Supplement to: Jang, Kwangchul; Han, Yeongcheol; Huh, Youngsook; Nam, Seung-Il; Stein, Ruediger; Mackensen, Andreas; Matthiessen, Jens (2013): Glacial freshwater discharge events recorded by authigenic neodymium isotopes in sediments from the Mendeleev Ridge, western Arctic Ocean. Earth and Planetary Science Letters, 369-370, 148-157, https://doi.org/10.1016/j.epsl.2013.03.018 |
op_relation |
Matthiessen, Jens (2013): Linescanner images of sediment core PS72/410-1 [dataset]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.817509 https://doi.pangaea.de/10.1594/PANGAEA.817616 https://doi.org/10.1594/PANGAEA.817616 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.81761610.1016/j.epsl.2013.03.01810.1594/PANGAEA.817509 |
_version_ |
1810293561313198080 |