(Table 1) Age determination of sediment core MD99-2284
Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 10 ± 5°C from a cold stadial to a warm interstadial phase, followed by gradual cooling before a rapid r...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.820939 2024-09-15T18:06:08+00:00 (Table 1) Age determination of sediment core MD99-2284 Dokken, Trond Nisancioglu, Kerim H Li, Camille Battisti, David S Kissel, Catherine LATITUDE: 62.374667 * LONGITUDE: -0.980167 * DATE/TIME START: 1999-08-01T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 * MINIMUM DEPTH, sediment/rock: 11.005 m * MAXIMUM DEPTH, sediment/rock: 30.755 m 2013 text/tab-separated-values, 40 data points https://doi.pangaea.de/10.1594/PANGAEA.820939 https://doi.org/10.1594/PANGAEA.820939 en eng PANGAEA Svensson, Anders M; Andersen, Katrine K; Bigler, Matthias; Clausen, Henrik Brink; Dahl-Jensen, Dorthe; Davies, Siwan M; Johnsen, Sigfús Jóhann; Muscheler, Raimund; Parrenin, Frédéric; Rasmussen, Sune Olander; Röthlisberger, Regine; Seierstad, Inger K; Steffensen, Jørgen Peder; Vinther, Bo Møllesøe (2008): A 60 000 year Greenland stratigraphic ice core chronology. Climate of the Past, 4(1), 47-57, https://doi.org/10.5194/cp-4-47-2008 https://doi.pangaea.de/10.1594/PANGAEA.820939 https://doi.org/10.1594/PANGAEA.820939 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Dokken, Trond; Nisancioglu, Kerim H; Li, Camille; Battisti, David S; Kissel, Catherine (2013): Dansgaard-Oeschger cycles: Interactions between ocean and sea ice intrinsic to the Nordic Seas. Paleoceanography, 28(3), 491-502, https://doi.org/10.1002/palo.20042 3664N/S Age 14C AMS 14C calibrated dated dated standard deviation maximum/old minimum/young Age model Calendar age CALYPSO Calypso Corer DEPTH sediment/rock IMAGES V Marion Dufresne (1995) MD114 MD99-2284 N. Shetland channel Sample ID dataset 2013 ftpangaea https://doi.org/10.1594/PANGAEA.82093910.1002/palo.2004210.5194/cp-4-47-2008 2024-07-24T02:31:32Z Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 10 ± 5°C from a cold stadial to a warm interstadial phase, followed by gradual cooling before a rapid return to stadial conditions. The mechanisms responsible for these millennial cycles are not fully understood but are widely thought to involve abrupt changes in Atlantic Meridional Overturning Circulation due to freshwater perturbations. Here we present a new, high-resolution multiproxy marine sediment core monitoring changes in the warm Atlantic inflow to the Nordic seas as well as in local sea ice cover and influx of ice-rafted debris. In contrast to previous studies, the freshwater input is found to be coincident with warm interstadials on Greenland and has a Fennoscandian rather than Laurentide source. Furthermore, the data suggest a different thermohaline structure for the Nordic seas during cold stadials in which relatively warm Atlantic water circulates beneath a fresh surface layer and the presence of sea ice is inferred from benthic oxygen isotopes. This implies a delicate balance between the warm subsurface Atlantic water and fresh surface layer, with the possibility of abrupt changes in sea ice cover, and suggests a novel mechanism for the abrupt D-O events observed in Greenland ice cores. Dataset Fennoscandian Greenland Greenland ice cores Nordic Seas Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-0.980167,-0.980167,62.374667,62.374667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
3664N/S Age 14C AMS 14C calibrated dated dated standard deviation maximum/old minimum/young Age model Calendar age CALYPSO Calypso Corer DEPTH sediment/rock IMAGES V Marion Dufresne (1995) MD114 MD99-2284 N. Shetland channel Sample ID |
spellingShingle |
3664N/S Age 14C AMS 14C calibrated dated dated standard deviation maximum/old minimum/young Age model Calendar age CALYPSO Calypso Corer DEPTH sediment/rock IMAGES V Marion Dufresne (1995) MD114 MD99-2284 N. Shetland channel Sample ID Dokken, Trond Nisancioglu, Kerim H Li, Camille Battisti, David S Kissel, Catherine (Table 1) Age determination of sediment core MD99-2284 |
topic_facet |
3664N/S Age 14C AMS 14C calibrated dated dated standard deviation maximum/old minimum/young Age model Calendar age CALYPSO Calypso Corer DEPTH sediment/rock IMAGES V Marion Dufresne (1995) MD114 MD99-2284 N. Shetland channel Sample ID |
description |
Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 10 ± 5°C from a cold stadial to a warm interstadial phase, followed by gradual cooling before a rapid return to stadial conditions. The mechanisms responsible for these millennial cycles are not fully understood but are widely thought to involve abrupt changes in Atlantic Meridional Overturning Circulation due to freshwater perturbations. Here we present a new, high-resolution multiproxy marine sediment core monitoring changes in the warm Atlantic inflow to the Nordic seas as well as in local sea ice cover and influx of ice-rafted debris. In contrast to previous studies, the freshwater input is found to be coincident with warm interstadials on Greenland and has a Fennoscandian rather than Laurentide source. Furthermore, the data suggest a different thermohaline structure for the Nordic seas during cold stadials in which relatively warm Atlantic water circulates beneath a fresh surface layer and the presence of sea ice is inferred from benthic oxygen isotopes. This implies a delicate balance between the warm subsurface Atlantic water and fresh surface layer, with the possibility of abrupt changes in sea ice cover, and suggests a novel mechanism for the abrupt D-O events observed in Greenland ice cores. |
format |
Dataset |
author |
Dokken, Trond Nisancioglu, Kerim H Li, Camille Battisti, David S Kissel, Catherine |
author_facet |
Dokken, Trond Nisancioglu, Kerim H Li, Camille Battisti, David S Kissel, Catherine |
author_sort |
Dokken, Trond |
title |
(Table 1) Age determination of sediment core MD99-2284 |
title_short |
(Table 1) Age determination of sediment core MD99-2284 |
title_full |
(Table 1) Age determination of sediment core MD99-2284 |
title_fullStr |
(Table 1) Age determination of sediment core MD99-2284 |
title_full_unstemmed |
(Table 1) Age determination of sediment core MD99-2284 |
title_sort |
(table 1) age determination of sediment core md99-2284 |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.820939 https://doi.org/10.1594/PANGAEA.820939 |
op_coverage |
LATITUDE: 62.374667 * LONGITUDE: -0.980167 * DATE/TIME START: 1999-08-01T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 * MINIMUM DEPTH, sediment/rock: 11.005 m * MAXIMUM DEPTH, sediment/rock: 30.755 m |
long_lat |
ENVELOPE(-0.980167,-0.980167,62.374667,62.374667) |
genre |
Fennoscandian Greenland Greenland ice cores Nordic Seas Sea ice |
genre_facet |
Fennoscandian Greenland Greenland ice cores Nordic Seas Sea ice |
op_source |
Supplement to: Dokken, Trond; Nisancioglu, Kerim H; Li, Camille; Battisti, David S; Kissel, Catherine (2013): Dansgaard-Oeschger cycles: Interactions between ocean and sea ice intrinsic to the Nordic Seas. Paleoceanography, 28(3), 491-502, https://doi.org/10.1002/palo.20042 |
op_relation |
Svensson, Anders M; Andersen, Katrine K; Bigler, Matthias; Clausen, Henrik Brink; Dahl-Jensen, Dorthe; Davies, Siwan M; Johnsen, Sigfús Jóhann; Muscheler, Raimund; Parrenin, Frédéric; Rasmussen, Sune Olander; Röthlisberger, Regine; Seierstad, Inger K; Steffensen, Jørgen Peder; Vinther, Bo Møllesøe (2008): A 60 000 year Greenland stratigraphic ice core chronology. Climate of the Past, 4(1), 47-57, https://doi.org/10.5194/cp-4-47-2008 https://doi.pangaea.de/10.1594/PANGAEA.820939 https://doi.org/10.1594/PANGAEA.820939 |
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.82093910.1002/palo.2004210.5194/cp-4-47-2008 |
_version_ |
1810443629724958720 |