(Table 1) Age determination of North Atlantic sediment cores
Stable isotope, trace metal, alkenone paleothermometry, and radiocarbon methods have been applied to sediment cores in the western subpolar North Atlantic between Hudson Strait and Cape Hatteras to reveal the history of climate in that region over the past ~11 kyr. We focus on cores from the Laurent...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.837084 2023-05-15T16:35:33+02:00 (Table 1) Age determination of North Atlantic sediment cores Keigwin, Lloyd D Sachs, Julian P Rosenthal, Yair Boyle, Edward A MEDIAN LATITUDE: 42.171947 * MEDIAN LONGITUDE: -58.633638 * SOUTH-BOUND LATITUDE: 36.867000 * WEST-BOUND LONGITUDE: -74.567000 * NORTH-BOUND LATITUDE: 43.483300 * EAST-BOUND LONGITUDE: -54.867000 * DATE/TIME START: 1998-07-06T00:00:00 * DATE/TIME END: 1998-07-06T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.000 m * MAXIMUM DEPTH, sediment/rock: 4.410 m 2005-10-22 text/tab-separated-values, 298 data points https://doi.pangaea.de/10.1594/PANGAEA.837084 https://doi.org/10.1594/PANGAEA.837084 en eng PANGAEA Keigwin, Lloyd D; Pickart, Robert (1999): Slope water current over the Laurentian Fan on interannual to millennial time scales. Science, 286(5439), 520-523, https://doi.org/10.1126/science.286.5439.520 https://doi.pangaea.de/10.1594/PANGAEA.837084 https://doi.org/10.1594/PANGAEA.837084 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Keigwin, Lloyd D; Sachs, Julian P; Rosenthal, Yair; Boyle, Edward A (2005): The 8200 year B.P. event in the slope water system, western subpolar North Atlantic. Paleoceanography, 20(2), PA2003, https://doi.org/10.1029/2004PA001074 Age 14C AMS dated dated material dated standard error maximum/old minimum/young Calendar age CH07-98-GGC19 DEPTH sediment/rock Elevation of event Event label GGC Giant gravity corer HU96-29-69 Laboratory code/label Latitude of event Longitude of event MUC MultiCorer North Atlantic OCE326-GGC14 OCE326-GGC26 OCE326-MC13 OCE326-MC25 PC Piston corer TC Trigger corer Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.837084 https://doi.org/10.1029/2004PA001074 https://doi.org/10.1126/science.286.5439.520 2023-01-20T09:04:05Z Stable isotope, trace metal, alkenone paleothermometry, and radiocarbon methods have been applied to sediment cores in the western subpolar North Atlantic between Hudson Strait and Cape Hatteras to reveal the history of climate in that region over the past ~11 kyr. We focus on cores from the Laurentian Fan, which is known to have rapid and continuous accumulation of hemipelagic sediment. Although results among our various proxy data are not always in agreement, the weight of the evidence (alkenone sea surface temperature (SST), d18O and abundance of Globigerinoides ruber) indicates a continual cooling of surface waters over Laurentian Fan, from about 18°C in the early Holocene to about 8°C today. Alternatively, Mg/Ca data on planktonic foraminifera indicate no systematic change in Holocene SST. The inferred long-term decrease in SST was probably driven by decreasing seasonality of Northern Hemisphere insolation. Two series of proxy data show the gradual cooling was interrupted by a two-step cold pulse that began 8500 years ago, and lasted about 700 years. Although this event is associated with the final deglaciation of Hudson Bay, there is no d18O minimum anywhere in the Labrador Sea, yet there is some evidence for it as far south as Cape Hatteras. Finally, although the 8200 year B.P. event has been implicated in decreasing North Atlantic ventilation, and hence widespread temperature depression on land and at sea, we find inconsistent evidence for a change at that time in deep ocean nutrient content at ~4 km water depth. Dataset Hudson Bay Hudson Strait Labrador Sea North Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Hudson Bay Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-74.567000,-54.867000,43.483300,36.867000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age 14C AMS dated dated material dated standard error maximum/old minimum/young Calendar age CH07-98-GGC19 DEPTH sediment/rock Elevation of event Event label GGC Giant gravity corer HU96-29-69 Laboratory code/label Latitude of event Longitude of event MUC MultiCorer North Atlantic OCE326-GGC14 OCE326-GGC26 OCE326-MC13 OCE326-MC25 PC Piston corer TC Trigger corer |
spellingShingle |
Age 14C AMS dated dated material dated standard error maximum/old minimum/young Calendar age CH07-98-GGC19 DEPTH sediment/rock Elevation of event Event label GGC Giant gravity corer HU96-29-69 Laboratory code/label Latitude of event Longitude of event MUC MultiCorer North Atlantic OCE326-GGC14 OCE326-GGC26 OCE326-MC13 OCE326-MC25 PC Piston corer TC Trigger corer Keigwin, Lloyd D Sachs, Julian P Rosenthal, Yair Boyle, Edward A (Table 1) Age determination of North Atlantic sediment cores |
topic_facet |
Age 14C AMS dated dated material dated standard error maximum/old minimum/young Calendar age CH07-98-GGC19 DEPTH sediment/rock Elevation of event Event label GGC Giant gravity corer HU96-29-69 Laboratory code/label Latitude of event Longitude of event MUC MultiCorer North Atlantic OCE326-GGC14 OCE326-GGC26 OCE326-MC13 OCE326-MC25 PC Piston corer TC Trigger corer |
description |
Stable isotope, trace metal, alkenone paleothermometry, and radiocarbon methods have been applied to sediment cores in the western subpolar North Atlantic between Hudson Strait and Cape Hatteras to reveal the history of climate in that region over the past ~11 kyr. We focus on cores from the Laurentian Fan, which is known to have rapid and continuous accumulation of hemipelagic sediment. Although results among our various proxy data are not always in agreement, the weight of the evidence (alkenone sea surface temperature (SST), d18O and abundance of Globigerinoides ruber) indicates a continual cooling of surface waters over Laurentian Fan, from about 18°C in the early Holocene to about 8°C today. Alternatively, Mg/Ca data on planktonic foraminifera indicate no systematic change in Holocene SST. The inferred long-term decrease in SST was probably driven by decreasing seasonality of Northern Hemisphere insolation. Two series of proxy data show the gradual cooling was interrupted by a two-step cold pulse that began 8500 years ago, and lasted about 700 years. Although this event is associated with the final deglaciation of Hudson Bay, there is no d18O minimum anywhere in the Labrador Sea, yet there is some evidence for it as far south as Cape Hatteras. Finally, although the 8200 year B.P. event has been implicated in decreasing North Atlantic ventilation, and hence widespread temperature depression on land and at sea, we find inconsistent evidence for a change at that time in deep ocean nutrient content at ~4 km water depth. |
format |
Dataset |
author |
Keigwin, Lloyd D Sachs, Julian P Rosenthal, Yair Boyle, Edward A |
author_facet |
Keigwin, Lloyd D Sachs, Julian P Rosenthal, Yair Boyle, Edward A |
author_sort |
Keigwin, Lloyd D |
title |
(Table 1) Age determination of North Atlantic sediment cores |
title_short |
(Table 1) Age determination of North Atlantic sediment cores |
title_full |
(Table 1) Age determination of North Atlantic sediment cores |
title_fullStr |
(Table 1) Age determination of North Atlantic sediment cores |
title_full_unstemmed |
(Table 1) Age determination of North Atlantic sediment cores |
title_sort |
(table 1) age determination of north atlantic sediment cores |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.837084 https://doi.org/10.1594/PANGAEA.837084 |
op_coverage |
MEDIAN LATITUDE: 42.171947 * MEDIAN LONGITUDE: -58.633638 * SOUTH-BOUND LATITUDE: 36.867000 * WEST-BOUND LONGITUDE: -74.567000 * NORTH-BOUND LATITUDE: 43.483300 * EAST-BOUND LONGITUDE: -54.867000 * DATE/TIME START: 1998-07-06T00:00:00 * DATE/TIME END: 1998-07-06T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.000 m * MAXIMUM DEPTH, sediment/rock: 4.410 m |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-74.567000,-54.867000,43.483300,36.867000) |
geographic |
Hudson Bay Hudson Hudson Strait |
geographic_facet |
Hudson Bay Hudson Hudson Strait |
genre |
Hudson Bay Hudson Strait Labrador Sea North Atlantic Planktonic foraminifera |
genre_facet |
Hudson Bay Hudson Strait Labrador Sea North Atlantic Planktonic foraminifera |
op_source |
Supplement to: Keigwin, Lloyd D; Sachs, Julian P; Rosenthal, Yair; Boyle, Edward A (2005): The 8200 year B.P. event in the slope water system, western subpolar North Atlantic. Paleoceanography, 20(2), PA2003, https://doi.org/10.1029/2004PA001074 |
op_relation |
Keigwin, Lloyd D; Pickart, Robert (1999): Slope water current over the Laurentian Fan on interannual to millennial time scales. Science, 286(5439), 520-523, https://doi.org/10.1126/science.286.5439.520 https://doi.pangaea.de/10.1594/PANGAEA.837084 https://doi.org/10.1594/PANGAEA.837084 |
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.837084 https://doi.org/10.1029/2004PA001074 https://doi.org/10.1126/science.286.5439.520 |
_version_ |
1766025797468946432 |