Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean
Sea surface temperature and salinity estimates reconstructed using planktonic foraminiferal abundance and delta18O records from core SU90-03 (40°N, 32°W, 2475 m water depth) reveal large climatic fluctuations linked to major instabilities in Northern Hemisphere ice sheets over the last 150 000 years...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.704862 2023-05-15T17:30:41+02:00 Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean Chapman, Mark R Shackleton, Nicholas J Duplessy, Jean-Claude MEDIAN LATITUDE: 47.847530 * MEDIAN LONGITUDE: -28.855522 * SOUTH-BOUND LATITUDE: 40.505000 * WEST-BOUND LONGITUDE: -32.053333 * NORTH-BOUND LATITUDE: 62.680000 * EAST-BOUND LONGITUDE: -22.200000 * DATE/TIME START: 1990-01-01T00:00:00 * DATE/TIME END: 1990-01-01T00:00:00 2000-09-30 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.704862 https://doi.org/10.1594/PANGAEA.704862 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.704862 https://doi.org/10.1594/PANGAEA.704862 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Chapman, Mark R; Shackleton, Nicholas J; Duplessy, Jean-Claude (2000): Sea surface temperature variability during the last glacial-interglacial cycle: assessing the magnitude and pattern of climate change in the North Atlantic. Palaeogeography, Palaeoclimatology, Palaeoecology, 157(1-2), 1-25, https://doi.org/10.1016/S0031-0182(99)00168-6 BC Box corer Charles Darwin Le Suroît NEAP NEAP-01B NEAP-02B NEAP-03B NEAP-04B NEAP-05B NEAP-06B NEAP-07B NEAP-08B NEAP-09B NEAP-10B NEAP-11B NEAP-12B NEAP-13B NEAP-14B NEAP-15B NEAP-16B NEAP-17B NEAP-18B NEAP-19B NEAP-20B North Atlantic PALEOCINAT PC Piston corer SU90-03 Dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.704862 https://doi.org/10.1016/S0031-0182(99)00168-6 2023-01-20T07:31:14Z Sea surface temperature and salinity estimates reconstructed using planktonic foraminiferal abundance and delta18O records from core SU90-03 (40°N, 32°W, 2475 m water depth) reveal large climatic fluctuations linked to major instabilities in Northern Hemisphere ice sheets over the last 150 000 years. Episodes of enhanced ice rafted detritus (IRD) input were accompanied by discrete temperature minima, representing coolings of between 4 and 8°C, and reductions in surface salinity of up to 2.5-3.5 per mil. Several additional cooling episodes of a similar magnitude were documented during intervals of low IRD input that appear to be synchronous, within the limits of dating, with ice rafting events spatially confined to higher latitudes. Accelerator mass spectrometer 14C dates for Heinrich events (H1 - 14.2 ka, H2 - 21.4 ka, H3 - 26.7 ka, H4 - 34.8 ka, H5 - 47.2 ka) obtained from core SU90-03 agree well with other published age estimates and suggest a contemporaneous pattern of climate change throughout the North Atlantic during the last glacial period. This interpretation is supported by a comparison of IRD and palaeotemperature records from DSDP site 609 and core SU90-03, which clearly shows that the major climatic fluctuations identified at high latitudes were transmitted toward the subtropics. However, 14C dates suggest that ice rafting episodes may be diachronous to some extent. The northward migration of the polar front after the H1 event at 40°N in the mid-Atlantic occurred at 14 ka, approximately 500 years earlier than along the Portuguese margin, where the southerly advection of polar waters persisted within eastern boundary current system. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-32.053333,-22.200000,62.680000,40.505000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
BC Box corer Charles Darwin Le Suroît NEAP NEAP-01B NEAP-02B NEAP-03B NEAP-04B NEAP-05B NEAP-06B NEAP-07B NEAP-08B NEAP-09B NEAP-10B NEAP-11B NEAP-12B NEAP-13B NEAP-14B NEAP-15B NEAP-16B NEAP-17B NEAP-18B NEAP-19B NEAP-20B North Atlantic PALEOCINAT PC Piston corer SU90-03 |
spellingShingle |
BC Box corer Charles Darwin Le Suroît NEAP NEAP-01B NEAP-02B NEAP-03B NEAP-04B NEAP-05B NEAP-06B NEAP-07B NEAP-08B NEAP-09B NEAP-10B NEAP-11B NEAP-12B NEAP-13B NEAP-14B NEAP-15B NEAP-16B NEAP-17B NEAP-18B NEAP-19B NEAP-20B North Atlantic PALEOCINAT PC Piston corer SU90-03 Chapman, Mark R Shackleton, Nicholas J Duplessy, Jean-Claude Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean |
topic_facet |
BC Box corer Charles Darwin Le Suroît NEAP NEAP-01B NEAP-02B NEAP-03B NEAP-04B NEAP-05B NEAP-06B NEAP-07B NEAP-08B NEAP-09B NEAP-10B NEAP-11B NEAP-12B NEAP-13B NEAP-14B NEAP-15B NEAP-16B NEAP-17B NEAP-18B NEAP-19B NEAP-20B North Atlantic PALEOCINAT PC Piston corer SU90-03 |
description |
Sea surface temperature and salinity estimates reconstructed using planktonic foraminiferal abundance and delta18O records from core SU90-03 (40°N, 32°W, 2475 m water depth) reveal large climatic fluctuations linked to major instabilities in Northern Hemisphere ice sheets over the last 150 000 years. Episodes of enhanced ice rafted detritus (IRD) input were accompanied by discrete temperature minima, representing coolings of between 4 and 8°C, and reductions in surface salinity of up to 2.5-3.5 per mil. Several additional cooling episodes of a similar magnitude were documented during intervals of low IRD input that appear to be synchronous, within the limits of dating, with ice rafting events spatially confined to higher latitudes. Accelerator mass spectrometer 14C dates for Heinrich events (H1 - 14.2 ka, H2 - 21.4 ka, H3 - 26.7 ka, H4 - 34.8 ka, H5 - 47.2 ka) obtained from core SU90-03 agree well with other published age estimates and suggest a contemporaneous pattern of climate change throughout the North Atlantic during the last glacial period. This interpretation is supported by a comparison of IRD and palaeotemperature records from DSDP site 609 and core SU90-03, which clearly shows that the major climatic fluctuations identified at high latitudes were transmitted toward the subtropics. However, 14C dates suggest that ice rafting episodes may be diachronous to some extent. The northward migration of the polar front after the H1 event at 40°N in the mid-Atlantic occurred at 14 ka, approximately 500 years earlier than along the Portuguese margin, where the southerly advection of polar waters persisted within eastern boundary current system. |
format |
Dataset |
author |
Chapman, Mark R Shackleton, Nicholas J Duplessy, Jean-Claude |
author_facet |
Chapman, Mark R Shackleton, Nicholas J Duplessy, Jean-Claude |
author_sort |
Chapman, Mark R |
title |
Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean |
title_short |
Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean |
title_full |
Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean |
title_fullStr |
Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean |
title_full_unstemmed |
Stable oxygen isotope record and age determination of sediments from the North Atlantic Ocean |
title_sort |
stable oxygen isotope record and age determination of sediments from the north atlantic ocean |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.704862 https://doi.org/10.1594/PANGAEA.704862 |
op_coverage |
MEDIAN LATITUDE: 47.847530 * MEDIAN LONGITUDE: -28.855522 * SOUTH-BOUND LATITUDE: 40.505000 * WEST-BOUND LONGITUDE: -32.053333 * NORTH-BOUND LATITUDE: 62.680000 * EAST-BOUND LONGITUDE: -22.200000 * DATE/TIME START: 1990-01-01T00:00:00 * DATE/TIME END: 1990-01-01T00:00:00 |
long_lat |
ENVELOPE(-32.053333,-22.200000,62.680000,40.505000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Chapman, Mark R; Shackleton, Nicholas J; Duplessy, Jean-Claude (2000): Sea surface temperature variability during the last glacial-interglacial cycle: assessing the magnitude and pattern of climate change in the North Atlantic. Palaeogeography, Palaeoclimatology, Palaeoecology, 157(1-2), 1-25, https://doi.org/10.1016/S0031-0182(99)00168-6 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.704862 https://doi.org/10.1594/PANGAEA.704862 |
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.704862 https://doi.org/10.1016/S0031-0182(99)00168-6 |
_version_ |
1766127570240143360 |