Petrologic data from Site U1308 over the last three glaciations
A composite North Atlantic record from DSDP Site 609 and IODP Site U1308 spans the past 300,000 years and shows that variability within the penultimate glaciation differed substantially from that of the surrounding two glaciations. Hematite stained grains exhibit similar repetitive down-core variati...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.834640 2023-05-15T13:42:11+02:00 Petrologic data from Site U1308 over the last three glaciations Obrochta, Stephen P Crowley, Thomas J Channell, James E T Hodell, David A Baker, Paul A Seki, Arisa Yokoyama, Yusuke MEDIAN LATITUDE: 49.877781 * MEDIAN LONGITUDE: -24.238112 * SOUTH-BOUND LATITUDE: 49.877760 * WEST-BOUND LONGITUDE: -24.238117 * NORTH-BOUND LATITUDE: 49.878333 * EAST-BOUND LONGITUDE: -24.238110 * DATE/TIME START: 2004-10-30T00:00:00 * DATE/TIME END: 2004-10-30T00:00:00 2014-08-04 application/zip, 9 datasets https://doi.pangaea.de/10.1594/PANGAEA.834640 https://doi.org/10.1594/PANGAEA.834640 en eng PANGAEA Obrochta, Stephen P; Miyahara, Hiroko; Yokoyama, Yusuke; Crowley, Thomas J (2012): A re-examination of evidence for the North Atlantic “1500-year cycle” at Site 609. Quaternary Science Reviews, 55, 23-33, https://doi.org/10.1016/j.quascirev.2012.08.008 Obrochta, Stephen P; Miyahara, Hiroko; Yokoyama, Yusuke; Crowley, Thomas J (2012): Chronology and petrology in MIS4-2 of DSDP Site 94-609. PANGAEA, https://doi.org/10.1594/PANGAEA.834701 (data in MIS4-2 of DSDP Site 94-609) https://doi.pangaea.de/10.1594/PANGAEA.834640 https://doi.org/10.1594/PANGAEA.834640 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Obrochta, Stephen P; Crowley, Thomas J; Channell, James E T; Hodell, David A; Baker, Paul A; Seki, Arisa; Yokoyama, Yusuke (2014): Climate variability and ice-sheet dynamics during the last three glaciations. Earth and Planetary Science Letters, 406, 198-212, https://doi.org/10.1016/j.epsl.2014.09.004 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.834640 https://doi.org/10.1016/j.epsl.2014.09.004 https://doi.org/10.1016/j.quascirev.2012.08.008 https://doi.org/10.1594/PANGAEA.834701 2023-01-20T07:33:19Z A composite North Atlantic record from DSDP Site 609 and IODP Site U1308 spans the past 300,000 years and shows that variability within the penultimate glaciation differed substantially from that of the surrounding two glaciations. Hematite stained grains exhibit similar repetitive down-core variations within the Marine Isotope Stage (MIS) 8 and 4-2 intervals, but little cyclic variability within the MIS 6 section. There is also no petrologic evidence, in terms of detrital carbonate-rich (Heinrich) layers, for surging of the Laurentide Ice Sheet through the Hudson Strait during MIS 6. Rather, very high background concentration of ice-rafted debris (IRD) indicates near continuous glacial meltwater input that likely increased thermohaline disruption sensitivity to relatively weak forcing events, such as expanded sea ice over deepwater formation sites. Altered (sub)tropical precipitation patterns and Antarctic warming during high orbital precession and low 65° N summer insolation appears related to high abundance of Icelandic glass shards and southward sea ice expansion. Differing European and North American ice sheet configurations, perhaps aided by larger variations in eccentricity leading to cooler summers, may have contributed to the relative stability of the Laurentide Ice Sheet in the Hudson Strait region during MIS 6. Dataset Antarc* Antarctic Hudson Strait Ice Sheet North Atlantic Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-24.238117,-24.238110,49.878333,49.877760) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
spellingShingle |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Obrochta, Stephen P Crowley, Thomas J Channell, James E T Hodell, David A Baker, Paul A Seki, Arisa Yokoyama, Yusuke Petrologic data from Site U1308 over the last three glaciations |
topic_facet |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
description |
A composite North Atlantic record from DSDP Site 609 and IODP Site U1308 spans the past 300,000 years and shows that variability within the penultimate glaciation differed substantially from that of the surrounding two glaciations. Hematite stained grains exhibit similar repetitive down-core variations within the Marine Isotope Stage (MIS) 8 and 4-2 intervals, but little cyclic variability within the MIS 6 section. There is also no petrologic evidence, in terms of detrital carbonate-rich (Heinrich) layers, for surging of the Laurentide Ice Sheet through the Hudson Strait during MIS 6. Rather, very high background concentration of ice-rafted debris (IRD) indicates near continuous glacial meltwater input that likely increased thermohaline disruption sensitivity to relatively weak forcing events, such as expanded sea ice over deepwater formation sites. Altered (sub)tropical precipitation patterns and Antarctic warming during high orbital precession and low 65° N summer insolation appears related to high abundance of Icelandic glass shards and southward sea ice expansion. Differing European and North American ice sheet configurations, perhaps aided by larger variations in eccentricity leading to cooler summers, may have contributed to the relative stability of the Laurentide Ice Sheet in the Hudson Strait region during MIS 6. |
format |
Dataset |
author |
Obrochta, Stephen P Crowley, Thomas J Channell, James E T Hodell, David A Baker, Paul A Seki, Arisa Yokoyama, Yusuke |
author_facet |
Obrochta, Stephen P Crowley, Thomas J Channell, James E T Hodell, David A Baker, Paul A Seki, Arisa Yokoyama, Yusuke |
author_sort |
Obrochta, Stephen P |
title |
Petrologic data from Site U1308 over the last three glaciations |
title_short |
Petrologic data from Site U1308 over the last three glaciations |
title_full |
Petrologic data from Site U1308 over the last three glaciations |
title_fullStr |
Petrologic data from Site U1308 over the last three glaciations |
title_full_unstemmed |
Petrologic data from Site U1308 over the last three glaciations |
title_sort |
petrologic data from site u1308 over the last three glaciations |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.834640 https://doi.org/10.1594/PANGAEA.834640 |
op_coverage |
MEDIAN LATITUDE: 49.877781 * MEDIAN LONGITUDE: -24.238112 * SOUTH-BOUND LATITUDE: 49.877760 * WEST-BOUND LONGITUDE: -24.238117 * NORTH-BOUND LATITUDE: 49.878333 * EAST-BOUND LONGITUDE: -24.238110 * DATE/TIME START: 2004-10-30T00:00:00 * DATE/TIME END: 2004-10-30T00:00:00 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-24.238117,-24.238110,49.878333,49.877760) |
geographic |
Antarctic Hudson Hudson Strait |
geographic_facet |
Antarctic Hudson Hudson Strait |
genre |
Antarc* Antarctic Hudson Strait Ice Sheet North Atlantic Sea ice |
genre_facet |
Antarc* Antarctic Hudson Strait Ice Sheet North Atlantic Sea ice |
op_source |
Supplement to: Obrochta, Stephen P; Crowley, Thomas J; Channell, James E T; Hodell, David A; Baker, Paul A; Seki, Arisa; Yokoyama, Yusuke (2014): Climate variability and ice-sheet dynamics during the last three glaciations. Earth and Planetary Science Letters, 406, 198-212, https://doi.org/10.1016/j.epsl.2014.09.004 |
op_relation |
Obrochta, Stephen P; Miyahara, Hiroko; Yokoyama, Yusuke; Crowley, Thomas J (2012): A re-examination of evidence for the North Atlantic “1500-year cycle” at Site 609. Quaternary Science Reviews, 55, 23-33, https://doi.org/10.1016/j.quascirev.2012.08.008 Obrochta, Stephen P; Miyahara, Hiroko; Yokoyama, Yusuke; Crowley, Thomas J (2012): Chronology and petrology in MIS4-2 of DSDP Site 94-609. PANGAEA, https://doi.org/10.1594/PANGAEA.834701 (data in MIS4-2 of DSDP Site 94-609) https://doi.pangaea.de/10.1594/PANGAEA.834640 https://doi.org/10.1594/PANGAEA.834640 |
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.834640 https://doi.org/10.1016/j.epsl.2014.09.004 https://doi.org/10.1016/j.quascirev.2012.08.008 https://doi.org/10.1594/PANGAEA.834701 |
_version_ |
1766164642558640128 |