Physical properties of sediment cores from the Labrador Sea
Sediment core logs from six sediment cores in the Labrador Sea show millennial-scale climate variability during the last glacial by recording all Heinrich events and several major Dansgaard-Oeschger cycles. The same millennial-scale climate change is documented for surface-water d18O records of Neog...
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2001
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.778950 2023-05-15T16:28:57+02:00 Physical properties of sediment cores from the Labrador Sea Weber, Michael E Mayer, Larry A Hillaire-Marcel, Claude Bilodeau, G Rack, Frank R Hiscott, Richard N Aksu, Ali E MEDIAN LATITUDE: 48.541667 * MEDIAN LONGITUDE: -49.560510 * SOUTH-BOUND LATITUDE: 42.099833 * WEST-BOUND LONGITUDE: -55.747500 * NORTH-BOUND LATITUDE: 58.917667 * EAST-BOUND LONGITUDE: -45.687000 * DATE/TIME START: 1995-06-18T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 2001-04-05 application/zip, 16 datasets https://doi.pangaea.de/10.1594/PANGAEA.778950 https://doi.org/10.1594/PANGAEA.778950 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.778950 https://doi.org/10.1594/PANGAEA.778950 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Weber, Michael E; Mayer, Larry A; Hillaire-Marcel, Claude; Bilodeau, G; Rack, Frank R; Hiscott, Richard N; Aksu, Ali E (2001): Derivation of d18O from sediment core log data: Implications for millennial-scale climate change in the Labrador Sea. Paleoceanography, 16(5), 503-514, https://doi.org/10.1029/2000PA000560 45F CALYPSO Calypso Corer Fogo Sea Mount Greenland Rise IMAGES IMAGES I IMAGES V International Marine Global Change Study Laurentian fan Marion Dufresne (1995) MD101 MD114 MD952024 MD95-2024 MD952025 MD95-2025 MD952026 MD95-2026 MD952028 MD95-2028 MD952029 MD95-2029 MD952031 MD95-2031 MD952033 MD95-2033 MD99-2242 Narwhal Orphan Knoll Sackville spur upper Laurentien Island Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.778950 https://doi.org/10.1029/2000PA000560 2023-01-20T07:32:29Z Sediment core logs from six sediment cores in the Labrador Sea show millennial-scale climate variability during the last glacial by recording all Heinrich events and several major Dansgaard-Oeschger cycles. The same millennial-scale climate change is documented for surface-water d18O records of Neogloboquadrina pachyderma (left coiled); hence the surface-water d18O record can be derived from sediment core logging by means of multiple linear regression, providing a paleoclimate proxy record at very high temporal resolution (70 yrs). For the Labrador Sea, sediment core logs contain important information about deep-water current velocities and also reflect the variable input of IRD from different sources as inferred from grain-size analysis, benthic d18O, the relation of density and p-wave velocity, and magnetic susceptibility. For the last glacial, faster deep-water currents which correspond to highs in sediment physical properties, occurred during iceberg discharge and lasted for a several centuries to a few millennia. Those enhanced currents might have contributed to increased production of intermediate waters during times of reduced production of North Atlantic Deep Water. Hudson Strait might have acted as a major supplier of detrital carbonate only during lowered sea level (greater ice extent). During coldest atmospheric temperatures over Greenland, deep-water currents increased during iceberg discharge in the Labrador Sea, then surface water freshened shortly after, while the abrupt atmospheric temperature rise happened after a larger time lag of >=1 kyr. The correlation implies a strong link and common forcing for atmosphere, sea surface, and deep water during the last glacial at millennial time scales but decoupling at orbital time scales. Dataset Greenland Hudson Strait Labrador Sea narwhal* Neogloboquadrina pachyderma North Atlantic Deep Water North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Fogo ENVELOPE(-54.281,-54.281,49.717,49.717) Greenland Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Orphan Knoll ENVELOPE(-46.500,-46.500,50.500,50.500) ENVELOPE(-55.747500,-45.687000,58.917667,42.099833) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
45F CALYPSO Calypso Corer Fogo Sea Mount Greenland Rise IMAGES IMAGES I IMAGES V International Marine Global Change Study Laurentian fan Marion Dufresne (1995) MD101 MD114 MD952024 MD95-2024 MD952025 MD95-2025 MD952026 MD95-2026 MD952028 MD95-2028 MD952029 MD95-2029 MD952031 MD95-2031 MD952033 MD95-2033 MD99-2242 Narwhal Orphan Knoll Sackville spur upper Laurentien Island |
spellingShingle |
45F CALYPSO Calypso Corer Fogo Sea Mount Greenland Rise IMAGES IMAGES I IMAGES V International Marine Global Change Study Laurentian fan Marion Dufresne (1995) MD101 MD114 MD952024 MD95-2024 MD952025 MD95-2025 MD952026 MD95-2026 MD952028 MD95-2028 MD952029 MD95-2029 MD952031 MD95-2031 MD952033 MD95-2033 MD99-2242 Narwhal Orphan Knoll Sackville spur upper Laurentien Island Weber, Michael E Mayer, Larry A Hillaire-Marcel, Claude Bilodeau, G Rack, Frank R Hiscott, Richard N Aksu, Ali E Physical properties of sediment cores from the Labrador Sea |
topic_facet |
45F CALYPSO Calypso Corer Fogo Sea Mount Greenland Rise IMAGES IMAGES I IMAGES V International Marine Global Change Study Laurentian fan Marion Dufresne (1995) MD101 MD114 MD952024 MD95-2024 MD952025 MD95-2025 MD952026 MD95-2026 MD952028 MD95-2028 MD952029 MD95-2029 MD952031 MD95-2031 MD952033 MD95-2033 MD99-2242 Narwhal Orphan Knoll Sackville spur upper Laurentien Island |
description |
Sediment core logs from six sediment cores in the Labrador Sea show millennial-scale climate variability during the last glacial by recording all Heinrich events and several major Dansgaard-Oeschger cycles. The same millennial-scale climate change is documented for surface-water d18O records of Neogloboquadrina pachyderma (left coiled); hence the surface-water d18O record can be derived from sediment core logging by means of multiple linear regression, providing a paleoclimate proxy record at very high temporal resolution (70 yrs). For the Labrador Sea, sediment core logs contain important information about deep-water current velocities and also reflect the variable input of IRD from different sources as inferred from grain-size analysis, benthic d18O, the relation of density and p-wave velocity, and magnetic susceptibility. For the last glacial, faster deep-water currents which correspond to highs in sediment physical properties, occurred during iceberg discharge and lasted for a several centuries to a few millennia. Those enhanced currents might have contributed to increased production of intermediate waters during times of reduced production of North Atlantic Deep Water. Hudson Strait might have acted as a major supplier of detrital carbonate only during lowered sea level (greater ice extent). During coldest atmospheric temperatures over Greenland, deep-water currents increased during iceberg discharge in the Labrador Sea, then surface water freshened shortly after, while the abrupt atmospheric temperature rise happened after a larger time lag of >=1 kyr. The correlation implies a strong link and common forcing for atmosphere, sea surface, and deep water during the last glacial at millennial time scales but decoupling at orbital time scales. |
format |
Dataset |
author |
Weber, Michael E Mayer, Larry A Hillaire-Marcel, Claude Bilodeau, G Rack, Frank R Hiscott, Richard N Aksu, Ali E |
author_facet |
Weber, Michael E Mayer, Larry A Hillaire-Marcel, Claude Bilodeau, G Rack, Frank R Hiscott, Richard N Aksu, Ali E |
author_sort |
Weber, Michael E |
title |
Physical properties of sediment cores from the Labrador Sea |
title_short |
Physical properties of sediment cores from the Labrador Sea |
title_full |
Physical properties of sediment cores from the Labrador Sea |
title_fullStr |
Physical properties of sediment cores from the Labrador Sea |
title_full_unstemmed |
Physical properties of sediment cores from the Labrador Sea |
title_sort |
physical properties of sediment cores from the labrador sea |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.778950 https://doi.org/10.1594/PANGAEA.778950 |
op_coverage |
MEDIAN LATITUDE: 48.541667 * MEDIAN LONGITUDE: -49.560510 * SOUTH-BOUND LATITUDE: 42.099833 * WEST-BOUND LONGITUDE: -55.747500 * NORTH-BOUND LATITUDE: 58.917667 * EAST-BOUND LONGITUDE: -45.687000 * DATE/TIME START: 1995-06-18T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 |
long_lat |
ENVELOPE(-54.281,-54.281,49.717,49.717) ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-46.500,-46.500,50.500,50.500) ENVELOPE(-55.747500,-45.687000,58.917667,42.099833) |
geographic |
Fogo Greenland Hudson Hudson Strait Orphan Knoll |
geographic_facet |
Fogo Greenland Hudson Hudson Strait Orphan Knoll |
genre |
Greenland Hudson Strait Labrador Sea narwhal* Neogloboquadrina pachyderma North Atlantic Deep Water North Atlantic |
genre_facet |
Greenland Hudson Strait Labrador Sea narwhal* Neogloboquadrina pachyderma North Atlantic Deep Water North Atlantic |
op_source |
Supplement to: Weber, Michael E; Mayer, Larry A; Hillaire-Marcel, Claude; Bilodeau, G; Rack, Frank R; Hiscott, Richard N; Aksu, Ali E (2001): Derivation of d18O from sediment core log data: Implications for millennial-scale climate change in the Labrador Sea. Paleoceanography, 16(5), 503-514, https://doi.org/10.1029/2000PA000560 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.778950 https://doi.org/10.1594/PANGAEA.778950 |
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.778950 https://doi.org/10.1029/2000PA000560 |
_version_ |
1766018634150313984 |