Sedimentology of the Reykjanes Ridge, Southeast Greenland
Marine records from the Reykjanes Ridge indicate ice sheet variations and abrupt climate changes. One of these records, ice-rafted detritus (IRD), serves as a proxy for iceberg discharges that probably indicates ice sheet fluctuations. The IRD records suggest that iceberg discharge 68,000-10,000 yr...
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1998
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735768 2023-05-15T16:30:14+02:00 Sedimentology of the Reykjanes Ridge, Southeast Greenland Lackschewitz, Klas Sven Baumann, Karl-Heinz Gehrke, B Wallrabe-Adams, Hans-Joachim Thiede, Jörn Bonani, Georges Endler, Rudolf Erlenkeuser, Helmut Heinemeier, Jan MEDIAN LATITUDE: 59.125622 * MEDIAN LONGITUDE: -30.823211 * SOUTH-BOUND LATITUDE: 58.942000 * WEST-BOUND LONGITUDE: -31.114333 * NORTH-BOUND LATITUDE: 59.357333 * EAST-BOUND LONGITUDE: -30.478667 * DATE/TIME START: 1992-10-19T00:00:00 * DATE/TIME END: 1993-09-11T00:00:00 1998-03-26 application/zip, 15 datasets https://doi.pangaea.de/10.1594/PANGAEA.735768 https://doi.org/10.1594/PANGAEA.735768 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.735768 https://doi.org/10.1594/PANGAEA.735768 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lackschewitz, Klas Sven; Baumann, Karl-Heinz; Gehrke, B; Wallrabe-Adams, Hans-Joachim; Thiede, Jörn; Bonani, Georges; Endler, Rudolf; Erlenkeuser, Helmut; Heinemeier, Jan (1998): North Atlantic ice sheet fluctuations 10,000-70,000 yr ago as inferred from deposits on the Reykjanes Ridge, southeast of Greenland. Quaternary Research, 49(2), 171-182, https://doi.org/10.1006/qres.1997.1948 GEOMAR Giant box corer GKG Gravity corer (Kiel type) Helmholtz Centre for Ocean Research Kiel KAL Kasten corer LO09 LO09/21-2 LO09/23-2 Professor Logachev REYKJANES-RÜCKEN SL SO82 SO82_2-1 SO82_2-2 SO82_4-1 SO82_4-2 SO82_5-1 SO82_5-2 SO82_7-2 Sonne Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.735768 https://doi.org/10.1006/qres.1997.1948 2023-01-20T07:31:43Z Marine records from the Reykjanes Ridge indicate ice sheet variations and abrupt climate changes. One of these records, ice-rafted detritus (IRD), serves as a proxy for iceberg discharges that probably indicates ice sheet fluctuations. The IRD records suggest that iceberg discharge 68,000-10,000 yr B.P. happened more frequently than the 7000- to 10,000-yr spacing of the Heinrich events. An IRD peak 67,000 to 63,000 yr B.P. further suggests that the Middle Weichselian glaciation started about 12,000 yr earlier in the North Atlantic than in the Norwegian Sea. Several later IRD events, in contrast, correlate with Norwegian Sea IRD-rich layers and imply coeval ice sheet advances in the North Atlantic and the Norwegian Sea. Coccoliths in a core from the Reykjanes Ridge show distinct peaks in species that record occasional inflow of warm surface water during the last glaciation, as previously reported from the eastern Labrador Sea. High abundances of coccoliths, together with a decrease ofNeogloboquadrina pachydermasin. and relatively low delta18O values, imply enhanced advection of the North Atlantic Current 69,000-67,000 yr B.P., 56,000-54,000 yr B.P., 35,000-33,000 yr B.P., and 26,000-23,000 yr B.P. This advection provided a regional moisture source for extension of ice sheets onto the shelf. In contrast, most of the IRD events are characterized by cold polar surface water masses indicating rapid variations in ocean surface conditions. Dataset Greenland Ice Sheet Labrador Sea north atlantic current North Atlantic Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Greenland Norwegian Sea Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-31.114333,-30.478667,59.357333,58.942000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
GEOMAR Giant box corer GKG Gravity corer (Kiel type) Helmholtz Centre for Ocean Research Kiel KAL Kasten corer LO09 LO09/21-2 LO09/23-2 Professor Logachev REYKJANES-RÜCKEN SL SO82 SO82_2-1 SO82_2-2 SO82_4-1 SO82_4-2 SO82_5-1 SO82_5-2 SO82_7-2 Sonne |
spellingShingle |
GEOMAR Giant box corer GKG Gravity corer (Kiel type) Helmholtz Centre for Ocean Research Kiel KAL Kasten corer LO09 LO09/21-2 LO09/23-2 Professor Logachev REYKJANES-RÜCKEN SL SO82 SO82_2-1 SO82_2-2 SO82_4-1 SO82_4-2 SO82_5-1 SO82_5-2 SO82_7-2 Sonne Lackschewitz, Klas Sven Baumann, Karl-Heinz Gehrke, B Wallrabe-Adams, Hans-Joachim Thiede, Jörn Bonani, Georges Endler, Rudolf Erlenkeuser, Helmut Heinemeier, Jan Sedimentology of the Reykjanes Ridge, Southeast Greenland |
topic_facet |
GEOMAR Giant box corer GKG Gravity corer (Kiel type) Helmholtz Centre for Ocean Research Kiel KAL Kasten corer LO09 LO09/21-2 LO09/23-2 Professor Logachev REYKJANES-RÜCKEN SL SO82 SO82_2-1 SO82_2-2 SO82_4-1 SO82_4-2 SO82_5-1 SO82_5-2 SO82_7-2 Sonne |
description |
Marine records from the Reykjanes Ridge indicate ice sheet variations and abrupt climate changes. One of these records, ice-rafted detritus (IRD), serves as a proxy for iceberg discharges that probably indicates ice sheet fluctuations. The IRD records suggest that iceberg discharge 68,000-10,000 yr B.P. happened more frequently than the 7000- to 10,000-yr spacing of the Heinrich events. An IRD peak 67,000 to 63,000 yr B.P. further suggests that the Middle Weichselian glaciation started about 12,000 yr earlier in the North Atlantic than in the Norwegian Sea. Several later IRD events, in contrast, correlate with Norwegian Sea IRD-rich layers and imply coeval ice sheet advances in the North Atlantic and the Norwegian Sea. Coccoliths in a core from the Reykjanes Ridge show distinct peaks in species that record occasional inflow of warm surface water during the last glaciation, as previously reported from the eastern Labrador Sea. High abundances of coccoliths, together with a decrease ofNeogloboquadrina pachydermasin. and relatively low delta18O values, imply enhanced advection of the North Atlantic Current 69,000-67,000 yr B.P., 56,000-54,000 yr B.P., 35,000-33,000 yr B.P., and 26,000-23,000 yr B.P. This advection provided a regional moisture source for extension of ice sheets onto the shelf. In contrast, most of the IRD events are characterized by cold polar surface water masses indicating rapid variations in ocean surface conditions. |
format |
Dataset |
author |
Lackschewitz, Klas Sven Baumann, Karl-Heinz Gehrke, B Wallrabe-Adams, Hans-Joachim Thiede, Jörn Bonani, Georges Endler, Rudolf Erlenkeuser, Helmut Heinemeier, Jan |
author_facet |
Lackschewitz, Klas Sven Baumann, Karl-Heinz Gehrke, B Wallrabe-Adams, Hans-Joachim Thiede, Jörn Bonani, Georges Endler, Rudolf Erlenkeuser, Helmut Heinemeier, Jan |
author_sort |
Lackschewitz, Klas Sven |
title |
Sedimentology of the Reykjanes Ridge, Southeast Greenland |
title_short |
Sedimentology of the Reykjanes Ridge, Southeast Greenland |
title_full |
Sedimentology of the Reykjanes Ridge, Southeast Greenland |
title_fullStr |
Sedimentology of the Reykjanes Ridge, Southeast Greenland |
title_full_unstemmed |
Sedimentology of the Reykjanes Ridge, Southeast Greenland |
title_sort |
sedimentology of the reykjanes ridge, southeast greenland |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.735768 https://doi.org/10.1594/PANGAEA.735768 |
op_coverage |
MEDIAN LATITUDE: 59.125622 * MEDIAN LONGITUDE: -30.823211 * SOUTH-BOUND LATITUDE: 58.942000 * WEST-BOUND LONGITUDE: -31.114333 * NORTH-BOUND LATITUDE: 59.357333 * EAST-BOUND LONGITUDE: -30.478667 * DATE/TIME START: 1992-10-19T00:00:00 * DATE/TIME END: 1993-09-11T00:00:00 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-31.114333,-30.478667,59.357333,58.942000) |
geographic |
Greenland Norwegian Sea Reykjanes |
geographic_facet |
Greenland Norwegian Sea Reykjanes |
genre |
Greenland Ice Sheet Labrador Sea north atlantic current North Atlantic Norwegian Sea |
genre_facet |
Greenland Ice Sheet Labrador Sea north atlantic current North Atlantic Norwegian Sea |
op_source |
Supplement to: Lackschewitz, Klas Sven; Baumann, Karl-Heinz; Gehrke, B; Wallrabe-Adams, Hans-Joachim; Thiede, Jörn; Bonani, Georges; Endler, Rudolf; Erlenkeuser, Helmut; Heinemeier, Jan (1998): North Atlantic ice sheet fluctuations 10,000-70,000 yr ago as inferred from deposits on the Reykjanes Ridge, southeast of Greenland. Quaternary Research, 49(2), 171-182, https://doi.org/10.1006/qres.1997.1948 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.735768 https://doi.org/10.1594/PANGAEA.735768 |
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.735768 https://doi.org/10.1006/qres.1997.1948 |
_version_ |
1766019947555717120 |