Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442
Surface and deepwater paleoclimate records in Irminger Sea core SO82-5 (59°N, 31°W) and Icelandic Sea core PS2644 (68°N, 22°W) exhibit large fluctuations in thermohaline circulation (THC) from 60 to 18 calendar kyr B.P., with a dominant periodicity of 1460 years from 46 to 22 calendar kyr B.P., matc...
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ftdatacite:10.1594/pangaea.735017 2023-05-15T16:00:42+02:00 Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442 van Kreveld, Shirley A Sarnthein, Michael Erlenkeuser, Helmut Grootes, Pieter Meiert Jung, Simon J A Pflaumann, Uwe Voelker, Antje H L 2000 application/zip https://dx.doi.org/10.1594/pangaea.735017 https://doi.pangaea.de/10.1594/PANGAEA.735017 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/1999pa000464 https://dx.doi.org/10.1007/978-3-642-56876-3_21 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY GLAMAP Kasten corer SO82 Sonne Global Environmental Change The Northern North Atlantic SFB313 Helmholtz Centre for Ocean Research Kiel GEOMAR Institute for Geosciences, Christian Albrechts University, Kiel GIK/IfG article Supplementary Collection of Datasets Collection 2000 ftdatacite https://doi.org/10.1594/pangaea.735017 https://doi.org/10.1029/1999pa000464 https://doi.org/10.1007/978-3-642-56876-3_21 2022-02-09T13:17:17Z Surface and deepwater paleoclimate records in Irminger Sea core SO82-5 (59°N, 31°W) and Icelandic Sea core PS2644 (68°N, 22°W) exhibit large fluctuations in thermohaline circulation (THC) from 60 to 18 calendar kyr B.P., with a dominant periodicity of 1460 years from 46 to 22 calendar kyr B.P., matching the Dansgaard-Oeschger (D-O) cycles in the Greenland Ice Sheet Project 2 (GISP2) temperature record [Grootes and Stuiver, 1997, doi:10.1029/97JC00880]. During interstadials, summer sea surface temperatures (SSTsu) in the Irminger Sea averaged to 8°C, and sea surface salinities (SSS) averaged to ~36.5, recording a strong Irminger Current and Atlantic THC. During stadials, SSTsu dropped to 2°-4°C, in phase with SSS drops by ~1-2. They reveal major meltwater injections along with the East Greenland Current, which turned off the North Atlantic deepwater convection and hence the heat advection to the north, in harmony with various ocean circulation and ice models. On the basis of the IRD composition, icebergs came from Iceland, east Greenland, and perhaps Svalbard and other northern ice sheets. However, the southward drifting icebergs were initially jammed in the Denmark Strait, reaching the Irminger Sea only with a lag of 155-195 years. We also conclude that the abrupt stadial terminations, the D-O warming events, were tied to iceberg melt via abundant seasonal sea ice and brine water formation in the meltwater-covered northwestern North Atlantic. In the 1/1460-year frequency band, benthic ?18O brine water spikes led the temperature maxima above Greenland and in the Irminger Sea by as little as 95 years. Thus abundant brine formation, which was induced by seasonal freezing of large parts of the northwestern Atlantic, may have finally entrained a current of warm surface water from the subtropics and thereby triggered the sudden reactivation of the THC. In summary, the internal dynamics of the east Greenland ice sheet may have formed the ultimate pacemaker of D-O cycles. Article in Journal/Newspaper Denmark Strait East Greenland east greenland current Greenland Greenland Ice Sheet Project Ice Sheet Iceland North Atlantic Sea ice Svalbard DataCite Metadata Store (German National Library of Science and Technology) Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Svalbard |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
GLAMAP Kasten corer SO82 Sonne Global Environmental Change The Northern North Atlantic SFB313 Helmholtz Centre for Ocean Research Kiel GEOMAR Institute for Geosciences, Christian Albrechts University, Kiel GIK/IfG |
spellingShingle |
GLAMAP Kasten corer SO82 Sonne Global Environmental Change The Northern North Atlantic SFB313 Helmholtz Centre for Ocean Research Kiel GEOMAR Institute for Geosciences, Christian Albrechts University, Kiel GIK/IfG van Kreveld, Shirley A Sarnthein, Michael Erlenkeuser, Helmut Grootes, Pieter Meiert Jung, Simon J A Pflaumann, Uwe Voelker, Antje H L Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442 |
topic_facet |
GLAMAP Kasten corer SO82 Sonne Global Environmental Change The Northern North Atlantic SFB313 Helmholtz Centre for Ocean Research Kiel GEOMAR Institute for Geosciences, Christian Albrechts University, Kiel GIK/IfG |
description |
Surface and deepwater paleoclimate records in Irminger Sea core SO82-5 (59°N, 31°W) and Icelandic Sea core PS2644 (68°N, 22°W) exhibit large fluctuations in thermohaline circulation (THC) from 60 to 18 calendar kyr B.P., with a dominant periodicity of 1460 years from 46 to 22 calendar kyr B.P., matching the Dansgaard-Oeschger (D-O) cycles in the Greenland Ice Sheet Project 2 (GISP2) temperature record [Grootes and Stuiver, 1997, doi:10.1029/97JC00880]. During interstadials, summer sea surface temperatures (SSTsu) in the Irminger Sea averaged to 8°C, and sea surface salinities (SSS) averaged to ~36.5, recording a strong Irminger Current and Atlantic THC. During stadials, SSTsu dropped to 2°-4°C, in phase with SSS drops by ~1-2. They reveal major meltwater injections along with the East Greenland Current, which turned off the North Atlantic deepwater convection and hence the heat advection to the north, in harmony with various ocean circulation and ice models. On the basis of the IRD composition, icebergs came from Iceland, east Greenland, and perhaps Svalbard and other northern ice sheets. However, the southward drifting icebergs were initially jammed in the Denmark Strait, reaching the Irminger Sea only with a lag of 155-195 years. We also conclude that the abrupt stadial terminations, the D-O warming events, were tied to iceberg melt via abundant seasonal sea ice and brine water formation in the meltwater-covered northwestern North Atlantic. In the 1/1460-year frequency band, benthic ?18O brine water spikes led the temperature maxima above Greenland and in the Irminger Sea by as little as 95 years. Thus abundant brine formation, which was induced by seasonal freezing of large parts of the northwestern Atlantic, may have finally entrained a current of warm surface water from the subtropics and thereby triggered the sudden reactivation of the THC. In summary, the internal dynamics of the east Greenland ice sheet may have formed the ultimate pacemaker of D-O cycles. |
format |
Article in Journal/Newspaper |
author |
van Kreveld, Shirley A Sarnthein, Michael Erlenkeuser, Helmut Grootes, Pieter Meiert Jung, Simon J A Pflaumann, Uwe Voelker, Antje H L |
author_facet |
van Kreveld, Shirley A Sarnthein, Michael Erlenkeuser, Helmut Grootes, Pieter Meiert Jung, Simon J A Pflaumann, Uwe Voelker, Antje H L |
author_sort |
van Kreveld, Shirley A |
title |
Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442 |
title_short |
Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442 |
title_full |
Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442 |
title_fullStr |
Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442 |
title_full_unstemmed |
Age determination and stable isotope record of foraminifera of sediment core SO82_5-2, supplement to: van Kreveld, Shirley A; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Jung, Simon J A; Pflaumann, Uwe; Voelker, Antje H L (2000): Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60-18 kyr. Paleoceanography, 15(4), 425-442 |
title_sort |
age determination and stable isotope record of foraminifera of sediment core so82_5-2, supplement to: van kreveld, shirley a; sarnthein, michael; erlenkeuser, helmut; grootes, pieter meiert; jung, simon j a; pflaumann, uwe; voelker, antje h l (2000): potential links between surging ice sheets, circulation changes, and the dansgaard-oeschger cycles in the irminger sea, 60-18 kyr. paleoceanography, 15(4), 425-442 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2000 |
url |
https://dx.doi.org/10.1594/pangaea.735017 https://doi.pangaea.de/10.1594/PANGAEA.735017 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Greenland Irminger Sea Svalbard |
geographic_facet |
Greenland Irminger Sea Svalbard |
genre |
Denmark Strait East Greenland east greenland current Greenland Greenland Ice Sheet Project Ice Sheet Iceland North Atlantic Sea ice Svalbard |
genre_facet |
Denmark Strait East Greenland east greenland current Greenland Greenland Ice Sheet Project Ice Sheet Iceland North Atlantic Sea ice Svalbard |
op_relation |
https://dx.doi.org/10.1029/1999pa000464 https://dx.doi.org/10.1007/978-3-642-56876-3_21 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.735017 https://doi.org/10.1029/1999pa000464 https://doi.org/10.1007/978-3-642-56876-3_21 |
_version_ |
1766396716458704896 |