(Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic
Short-term changes in sea surface conditions controlling the thermohaline circulation in the northern North Atlantic are expected to be especially efficient in perturbing global climate stability. Here we assess past variability of sea surface temperature (SST) in the northeast Atlantic and Norwegia...
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PANGAEA
2003
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.841465 https://doi.org/10.1594/PANGAEA.841465 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.841465 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age 14C calibrated 14C milieu/reservoir corrected (-400 yr) comment dated dated standard error Bear Island Fan Calendar age CALYPSO Calypso Corer DEPTH sediment/rock Elevation of event Event label GIK16396-1 GIK16397-2 GIK23071-5 GIK23074-1 GIK23415-9 Gravity corer (Kiel type) IMAGES I KAL Kasten corer Latitude of event Longitude of event M17/2 M2/2 Marion Dufresne (1995) MD101 MD952012 MD95-2012 Meteor (1986) Norwegian Sea off Iceland PO158/B POS158/2 Poseidon SL |
spellingShingle |
Age 14C calibrated 14C milieu/reservoir corrected (-400 yr) comment dated dated standard error Bear Island Fan Calendar age CALYPSO Calypso Corer DEPTH sediment/rock Elevation of event Event label GIK16396-1 GIK16397-2 GIK23071-5 GIK23074-1 GIK23415-9 Gravity corer (Kiel type) IMAGES I KAL Kasten corer Latitude of event Longitude of event M17/2 M2/2 Marion Dufresne (1995) MD101 MD952012 MD95-2012 Meteor (1986) Norwegian Sea off Iceland PO158/B POS158/2 Poseidon SL Weinelt, Mara Vogelsang, Elke Kucera, Michal Pflaumann, Uwe Sarnthein, Michael Voelker, Antje H L Erlenkeuser, Helmut Malmgren, Bjorn (Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic |
topic_facet |
Age 14C calibrated 14C milieu/reservoir corrected (-400 yr) comment dated dated standard error Bear Island Fan Calendar age CALYPSO Calypso Corer DEPTH sediment/rock Elevation of event Event label GIK16396-1 GIK16397-2 GIK23071-5 GIK23074-1 GIK23415-9 Gravity corer (Kiel type) IMAGES I KAL Kasten corer Latitude of event Longitude of event M17/2 M2/2 Marion Dufresne (1995) MD101 MD952012 MD95-2012 Meteor (1986) Norwegian Sea off Iceland PO158/B POS158/2 Poseidon SL |
description |
Short-term changes in sea surface conditions controlling the thermohaline circulation in the northern North Atlantic are expected to be especially efficient in perturbing global climate stability. Here we assess past variability of sea surface temperature (SST) in the northeast Atlantic and Norwegian Sea during Marine Isotope Stage (MIS) 2 and, in particular, during the Last Glacial Maximum (LGM). Five high-resolution SST records were established on a meridional transect (53°N-72°N) to trace centennial-scale oscillations in SST and sea-ice cover. We used three independent computational techniques (SIMMAX modern analogue technique, Artificial Neural Networks (ANN), and Revised Analog Method (RAM)) to reconstruct SST from planktonic foraminifer census counts. SIMMAX and ANN reproduced short-term SST oscillations of similar magnitude and absolute levels, while RAM, owing to a restrictive analog selection, appears less suitable for reconstructing "cold end" SST. The SIMMAX and ANN SST reconstructions support the existence of a weak paleo-Norwegian Current during Dansgaard-Oeschger (DO) interstadials number 4, 3, 2, and 1. During the LGM, two warm incursions of 7°C water to occurred in the northern North Atlantic but ended north of the Iceland Faroe Ridge. A rough numerical estimate shows that the near-surface poleward heat transfer from 53° across the Iceland-Faroe Ridge up to to 72° N dropped to less than 60% of the modern value during DO interstadials and to almost zero during DO stadials. Summer sea ice was generally confined to the area north of 70°N and only rarely expanded southward along the margins of continental ice sheets. Internal LGM variability of North Atlantic (>40°N) SST in the GLAMAP 2000 compilation (Sarnthein et al., 2003, doi:10.1029/2002PA000771; Pflaumann et al., 2003, doi:10.1029/2002PA000774) indicates maximum instability in the glacial subpolar gyre and at the Iberian Margin, while in the Nordic Seas, SST was continuously low. |
format |
Dataset |
author |
Weinelt, Mara Vogelsang, Elke Kucera, Michal Pflaumann, Uwe Sarnthein, Michael Voelker, Antje H L Erlenkeuser, Helmut Malmgren, Bjorn |
author_facet |
Weinelt, Mara Vogelsang, Elke Kucera, Michal Pflaumann, Uwe Sarnthein, Michael Voelker, Antje H L Erlenkeuser, Helmut Malmgren, Bjorn |
author_sort |
Weinelt, Mara |
title |
(Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic |
title_short |
(Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic |
title_full |
(Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic |
title_fullStr |
(Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic |
title_full_unstemmed |
(Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic |
title_sort |
(table 1) age control and temporal resolution of paleoceanographic records of the north atlantic |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.841465 https://doi.org/10.1594/PANGAEA.841465 |
op_coverage |
MEDIAN LATITUDE: 63.804556 * MEDIAN LONGITUDE: -3.721668 * SOUTH-BOUND LATITUDE: 53.178333 * WEST-BOUND LONGITUDE: -19.145000 * NORTH-BOUND LATITUDE: 72.151000 * EAST-BOUND LONGITUDE: 11.434330 * DATE/TIME START: 1986-07-12T00:00:00 * DATE/TIME END: 1995-06-09T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.100 m * MAXIMUM DEPTH, sediment/rock: 9.405 m |
long_lat |
ENVELOPE(-19.145000,11.434330,72.151000,53.178333) |
genre |
Bear Island Iceland Nordic Seas North Atlantic Northeast Atlantic Norwegian Sea Sea ice |
genre_facet |
Bear Island Iceland Nordic Seas North Atlantic Northeast Atlantic Norwegian Sea Sea ice |
op_source |
Supplement to: Weinelt, Mara; Vogelsang, Elke; Kucera, Michal; Pflaumann, Uwe; Sarnthein, Michael; Voelker, Antje H L; Erlenkeuser, Helmut; Malmgren, Bjorn (2003): Variability of North Atlantic heat transfer during MIS2. Paleoceanography, 18(3), 1065, https://doi.org/10.1029/2002PA000772 |
op_relation |
Stuiver, Minze; Reimer, Paula J; Bard, Edouard; Beck, J Warren; Burr, George S; Hughen, Konrad A; Kromer, Bernd; McCormac, F Gerry; van der Plicht, Johannes; Spurk, Marco (1998): INTCAL98 radiocarbon age calibration, 24,000-0 cal BP. Radiocarbon, 40(3), 1041-1083, https://doi.org/10.1017/S0033822200019123 Voelker, Antje H L; Sarnthein, Michael; Grootes, Pieter Meiert; Erlenkeuser, Helmut; Laj, Carlo E; Mazaud, Alain; Nadeau, Marie-Josée; Schleicher, M (1998): Correlation of marine 14C-ages from the Nordic Seas with the GISP2 isotope record: Implications for radiocarbon calibration beyond 25ka BP. Radiocarbon, 40(1), 517-534, https://doi.org/10.1017/S0033822200030368 https://doi.pangaea.de/10.1594/PANGAEA.841465 https://doi.org/10.1594/PANGAEA.841465 |
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.84146510.1029/2002PA00077210.1017/S003382220001912310.1017/S0033822200030368 |
_version_ |
1810434707205128192 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.841465 2024-09-15T17:58:19+00:00 (Table 1) Age control and temporal resolution of paleoceanographic records of the North Atlantic Weinelt, Mara Vogelsang, Elke Kucera, Michal Pflaumann, Uwe Sarnthein, Michael Voelker, Antje H L Erlenkeuser, Helmut Malmgren, Bjorn MEDIAN LATITUDE: 63.804556 * MEDIAN LONGITUDE: -3.721668 * SOUTH-BOUND LATITUDE: 53.178333 * WEST-BOUND LONGITUDE: -19.145000 * NORTH-BOUND LATITUDE: 72.151000 * EAST-BOUND LONGITUDE: 11.434330 * DATE/TIME START: 1986-07-12T00:00:00 * DATE/TIME END: 1995-06-09T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.100 m * MAXIMUM DEPTH, sediment/rock: 9.405 m 2003 text/tab-separated-values, 155 data points https://doi.pangaea.de/10.1594/PANGAEA.841465 https://doi.org/10.1594/PANGAEA.841465 en eng PANGAEA Stuiver, Minze; Reimer, Paula J; Bard, Edouard; Beck, J Warren; Burr, George S; Hughen, Konrad A; Kromer, Bernd; McCormac, F Gerry; van der Plicht, Johannes; Spurk, Marco (1998): INTCAL98 radiocarbon age calibration, 24,000-0 cal BP. Radiocarbon, 40(3), 1041-1083, https://doi.org/10.1017/S0033822200019123 Voelker, Antje H L; Sarnthein, Michael; Grootes, Pieter Meiert; Erlenkeuser, Helmut; Laj, Carlo E; Mazaud, Alain; Nadeau, Marie-Josée; Schleicher, M (1998): Correlation of marine 14C-ages from the Nordic Seas with the GISP2 isotope record: Implications for radiocarbon calibration beyond 25ka BP. Radiocarbon, 40(1), 517-534, https://doi.org/10.1017/S0033822200030368 https://doi.pangaea.de/10.1594/PANGAEA.841465 https://doi.org/10.1594/PANGAEA.841465 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Weinelt, Mara; Vogelsang, Elke; Kucera, Michal; Pflaumann, Uwe; Sarnthein, Michael; Voelker, Antje H L; Erlenkeuser, Helmut; Malmgren, Bjorn (2003): Variability of North Atlantic heat transfer during MIS2. Paleoceanography, 18(3), 1065, https://doi.org/10.1029/2002PA000772 Age 14C calibrated 14C milieu/reservoir corrected (-400 yr) comment dated dated standard error Bear Island Fan Calendar age CALYPSO Calypso Corer DEPTH sediment/rock Elevation of event Event label GIK16396-1 GIK16397-2 GIK23071-5 GIK23074-1 GIK23415-9 Gravity corer (Kiel type) IMAGES I KAL Kasten corer Latitude of event Longitude of event M17/2 M2/2 Marion Dufresne (1995) MD101 MD952012 MD95-2012 Meteor (1986) Norwegian Sea off Iceland PO158/B POS158/2 Poseidon SL dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.84146510.1029/2002PA00077210.1017/S003382220001912310.1017/S0033822200030368 2024-07-24T02:31:33Z Short-term changes in sea surface conditions controlling the thermohaline circulation in the northern North Atlantic are expected to be especially efficient in perturbing global climate stability. Here we assess past variability of sea surface temperature (SST) in the northeast Atlantic and Norwegian Sea during Marine Isotope Stage (MIS) 2 and, in particular, during the Last Glacial Maximum (LGM). Five high-resolution SST records were established on a meridional transect (53°N-72°N) to trace centennial-scale oscillations in SST and sea-ice cover. We used three independent computational techniques (SIMMAX modern analogue technique, Artificial Neural Networks (ANN), and Revised Analog Method (RAM)) to reconstruct SST from planktonic foraminifer census counts. SIMMAX and ANN reproduced short-term SST oscillations of similar magnitude and absolute levels, while RAM, owing to a restrictive analog selection, appears less suitable for reconstructing "cold end" SST. The SIMMAX and ANN SST reconstructions support the existence of a weak paleo-Norwegian Current during Dansgaard-Oeschger (DO) interstadials number 4, 3, 2, and 1. During the LGM, two warm incursions of 7°C water to occurred in the northern North Atlantic but ended north of the Iceland Faroe Ridge. A rough numerical estimate shows that the near-surface poleward heat transfer from 53° across the Iceland-Faroe Ridge up to to 72° N dropped to less than 60% of the modern value during DO interstadials and to almost zero during DO stadials. Summer sea ice was generally confined to the area north of 70°N and only rarely expanded southward along the margins of continental ice sheets. Internal LGM variability of North Atlantic (>40°N) SST in the GLAMAP 2000 compilation (Sarnthein et al., 2003, doi:10.1029/2002PA000771; Pflaumann et al., 2003, doi:10.1029/2002PA000774) indicates maximum instability in the glacial subpolar gyre and at the Iberian Margin, while in the Nordic Seas, SST was continuously low. Dataset Bear Island Iceland Nordic Seas North Atlantic Northeast Atlantic Norwegian Sea Sea ice PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-19.145000,11.434330,72.151000,53.178333) |