Age determinations on sediment cores from the North Atlantic
Sediments in the North Atlantic ocean contain as eries of layers that are rich in ice-rafted debris and unusally poor in foraminifera. Here we present evidence that the most recent six of the 'Heinrich layers', deposited between 14,000 and 70,000 years ago, record marked decreases in sea s...
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1992
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.724543 2023-05-15T16:29:43+02:00 Age determinations on sediment cores from the North Atlantic Bond, Gerard C Heinrich, Hartmut Broecker, Wallace S Labeyrie, Laurent D McManus, Jerry F Andrews, John T Huson, S Jantschik, Ruediger Clasen, Silke Simet, Christine Tedesco, Kathy Klas, Mieczyslawa Bonani, Georges Ivy, Susan MEDIAN LATITUDE: 49.954707 * MEDIAN LONGITUDE: -26.323204 * SOUTH-BOUND LATITUDE: 46.000000 * WEST-BOUND LONGITUDE: -45.050000 * NORTH-BOUND LATITUDE: 54.250000 * EAST-BOUND LONGITUDE: -16.830000 * DATE/TIME START: 1966-08-15T00:00:00 * DATE/TIME END: 1983-07-22T00:00:00 1992-07-08 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.724543 https://doi.org/10.1594/PANGAEA.724543 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.724543 https://doi.org/10.1594/PANGAEA.724543 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bond, Gerard C; Heinrich, Hartmut; Broecker, Wallace S; Labeyrie, Laurent D; McManus, Jerry F; Andrews, John T; Huson, S; Jantschik, Ruediger; Clasen, Silke; Simet, Christine; Tedesco, Kathy; Klas, Mieczyslawa; Bonani, Georges; Ivy, Susan (1992): Evidence for massive discharges of icebergs into the North Atlantic ocean during the last glacial period. Nature, 360(6401), 245-249, https://doi.org/10.1038/360245a0 94-609 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger HU75-055 Leg94 North Atlantic/FLANK PC Piston corer V23 V23-16 V23-81 Vema Dataset 1992 ftpangaea https://doi.org/10.1594/PANGAEA.724543 https://doi.org/10.1038/360245a0 2023-01-20T07:31:27Z Sediments in the North Atlantic ocean contain as eries of layers that are rich in ice-rafted debris and unusally poor in foraminifera. Here we present evidence that the most recent six of the 'Heinrich layers', deposited between 14,000 and 70,000 years ago, record marked decreases in sea surface temperature and salinity, decreases in the flux of planktonic forminifera to the sediments, and short-lived, massive discharges of icebergs originating in eastern Canada. The path of the icebergs, clearly marked by the presence of ice-rafted detrital carbonate, can be traced for more than 3,000 km - a remarkable distance, attesting to extreme cooling of surface waters and enormous amounts of drifiting ice. The cause of these extreme events is puzzling. They may reflect repated rapid advances of the Laurentide ice sheet, perhaps associated with reductions in air temperatures, yet temperature records from Greenland ice cores appear to exhibit only a weak corresponding signal. Moreover, the 5-10,000-yr intervals between the events are inconsistent with Milankovitch orbital periodicities, raising the question of what the ultimate cause of the postulated cooling may have been. Dataset Greenland Greenland ice cores Ice Sheet North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Canada Greenland ENVELOPE(-45.050000,-16.830000,54.250000,46.000000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
94-609 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger HU75-055 Leg94 North Atlantic/FLANK PC Piston corer V23 V23-16 V23-81 Vema |
spellingShingle |
94-609 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger HU75-055 Leg94 North Atlantic/FLANK PC Piston corer V23 V23-16 V23-81 Vema Bond, Gerard C Heinrich, Hartmut Broecker, Wallace S Labeyrie, Laurent D McManus, Jerry F Andrews, John T Huson, S Jantschik, Ruediger Clasen, Silke Simet, Christine Tedesco, Kathy Klas, Mieczyslawa Bonani, Georges Ivy, Susan Age determinations on sediment cores from the North Atlantic |
topic_facet |
94-609 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger HU75-055 Leg94 North Atlantic/FLANK PC Piston corer V23 V23-16 V23-81 Vema |
description |
Sediments in the North Atlantic ocean contain as eries of layers that are rich in ice-rafted debris and unusally poor in foraminifera. Here we present evidence that the most recent six of the 'Heinrich layers', deposited between 14,000 and 70,000 years ago, record marked decreases in sea surface temperature and salinity, decreases in the flux of planktonic forminifera to the sediments, and short-lived, massive discharges of icebergs originating in eastern Canada. The path of the icebergs, clearly marked by the presence of ice-rafted detrital carbonate, can be traced for more than 3,000 km - a remarkable distance, attesting to extreme cooling of surface waters and enormous amounts of drifiting ice. The cause of these extreme events is puzzling. They may reflect repated rapid advances of the Laurentide ice sheet, perhaps associated with reductions in air temperatures, yet temperature records from Greenland ice cores appear to exhibit only a weak corresponding signal. Moreover, the 5-10,000-yr intervals between the events are inconsistent with Milankovitch orbital periodicities, raising the question of what the ultimate cause of the postulated cooling may have been. |
format |
Dataset |
author |
Bond, Gerard C Heinrich, Hartmut Broecker, Wallace S Labeyrie, Laurent D McManus, Jerry F Andrews, John T Huson, S Jantschik, Ruediger Clasen, Silke Simet, Christine Tedesco, Kathy Klas, Mieczyslawa Bonani, Georges Ivy, Susan |
author_facet |
Bond, Gerard C Heinrich, Hartmut Broecker, Wallace S Labeyrie, Laurent D McManus, Jerry F Andrews, John T Huson, S Jantschik, Ruediger Clasen, Silke Simet, Christine Tedesco, Kathy Klas, Mieczyslawa Bonani, Georges Ivy, Susan |
author_sort |
Bond, Gerard C |
title |
Age determinations on sediment cores from the North Atlantic |
title_short |
Age determinations on sediment cores from the North Atlantic |
title_full |
Age determinations on sediment cores from the North Atlantic |
title_fullStr |
Age determinations on sediment cores from the North Atlantic |
title_full_unstemmed |
Age determinations on sediment cores from the North Atlantic |
title_sort |
age determinations on sediment cores from the north atlantic |
publisher |
PANGAEA |
publishDate |
1992 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.724543 https://doi.org/10.1594/PANGAEA.724543 |
op_coverage |
MEDIAN LATITUDE: 49.954707 * MEDIAN LONGITUDE: -26.323204 * SOUTH-BOUND LATITUDE: 46.000000 * WEST-BOUND LONGITUDE: -45.050000 * NORTH-BOUND LATITUDE: 54.250000 * EAST-BOUND LONGITUDE: -16.830000 * DATE/TIME START: 1966-08-15T00:00:00 * DATE/TIME END: 1983-07-22T00:00:00 |
long_lat |
ENVELOPE(-45.050000,-16.830000,54.250000,46.000000) |
geographic |
Canada Greenland |
geographic_facet |
Canada Greenland |
genre |
Greenland Greenland ice cores Ice Sheet North Atlantic |
genre_facet |
Greenland Greenland ice cores Ice Sheet North Atlantic |
op_source |
Supplement to: Bond, Gerard C; Heinrich, Hartmut; Broecker, Wallace S; Labeyrie, Laurent D; McManus, Jerry F; Andrews, John T; Huson, S; Jantschik, Ruediger; Clasen, Silke; Simet, Christine; Tedesco, Kathy; Klas, Mieczyslawa; Bonani, Georges; Ivy, Susan (1992): Evidence for massive discharges of icebergs into the North Atlantic ocean during the last glacial period. Nature, 360(6401), 245-249, https://doi.org/10.1038/360245a0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.724543 https://doi.org/10.1594/PANGAEA.724543 |
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.724543 https://doi.org/10.1038/360245a0 |
_version_ |
1766019419770716160 |