Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate
We present a 3.2 Myr record of stable isotopes and physical properties at IODP Site U1308 (reoccupation of DSDP Site 609) located within the ice-rafted detritus (IRD) belt of the North Atlantic. We compare the isotope and lithological proxies at Site U1308 with other North Atlantic records (e.g., si...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/261032 2024-02-04T10:02:28+01:00 Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate Hodell, DA Channell, JET 2016-09-07 application/pdf https://www.repository.cam.ac.uk/handle/1810/261032 https://doi.org/10.17863/CAM.6210 eng eng Copernicus Publications http://dx.doi.org/10.5194/cp-12-1805-2016 Climate of the Past https://www.repository.cam.ac.uk/handle/1810/261032 doi:10.17863/CAM.6210 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology Article 2016 ftunivcam https://doi.org/10.17863/CAM.6210 2024-01-11T23:26:56Z We present a 3.2 Myr record of stable isotopes and physical properties at IODP Site U1308 (reoccupation of DSDP Site 609) located within the ice-rafted detritus (IRD) belt of the North Atlantic. We compare the isotope and lithological proxies at Site U1308 with other North Atlantic records (e.g., sites 982, 607/U1313, and U1304) to reconstruct the history of orbital and millennial-scale climate variability during the Quaternary. The Site U1308 record documents a progressive increase in the intensity of Northern Hemisphere glacial–interglacial cycles during the late Pliocene and Quaternary, with mode transitions at ~ 2.7, 1.5, 0.9, and 0.65 Ma. These transitions mark times of change in the growth and stability of Northern Hemisphere ice sheets. They also coincide with increases in vertical carbon isotope gradients between the intermediate and deep ocean, suggesting changes in deep carbon storage and atmospheric CO$_2$. Orbital and millennial climate variability co-evolved during the Quaternary such that the trend towards larger and thicker ice sheets was accompanied by changes in the style, frequency, and intensity of millennial-scale variability. This co-evolution may be important for explaining the observed patterns of Quaternary climate change. National Science Foundation (Grant IDs: 0850413, 1014506), Natural Environment Research Council (Grant ID: NE/H009930/1) Article in Journal/Newspaper North Atlantic Apollo - University of Cambridge Repository |
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Open Polar |
collection |
Apollo - University of Cambridge Repository |
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ftunivcam |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology Hodell, DA Channell, JET Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology |
description |
We present a 3.2 Myr record of stable isotopes and physical properties at IODP Site U1308 (reoccupation of DSDP Site 609) located within the ice-rafted detritus (IRD) belt of the North Atlantic. We compare the isotope and lithological proxies at Site U1308 with other North Atlantic records (e.g., sites 982, 607/U1313, and U1304) to reconstruct the history of orbital and millennial-scale climate variability during the Quaternary. The Site U1308 record documents a progressive increase in the intensity of Northern Hemisphere glacial–interglacial cycles during the late Pliocene and Quaternary, with mode transitions at ~ 2.7, 1.5, 0.9, and 0.65 Ma. These transitions mark times of change in the growth and stability of Northern Hemisphere ice sheets. They also coincide with increases in vertical carbon isotope gradients between the intermediate and deep ocean, suggesting changes in deep carbon storage and atmospheric CO$_2$. Orbital and millennial climate variability co-evolved during the Quaternary such that the trend towards larger and thicker ice sheets was accompanied by changes in the style, frequency, and intensity of millennial-scale variability. This co-evolution may be important for explaining the observed patterns of Quaternary climate change. National Science Foundation (Grant IDs: 0850413, 1014506), Natural Environment Research Council (Grant ID: NE/H009930/1) |
format |
Article in Journal/Newspaper |
author |
Hodell, DA Channell, JET |
author_facet |
Hodell, DA Channell, JET |
author_sort |
Hodell, DA |
title |
Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate |
title_short |
Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate |
title_full |
Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate |
title_fullStr |
Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate |
title_full_unstemmed |
Mode transitions in Northern Hemisphere glaciation: co-evolution of millennial and orbital variability in Quaternary climate |
title_sort |
mode transitions in northern hemisphere glaciation: co-evolution of millennial and orbital variability in quaternary climate |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://www.repository.cam.ac.uk/handle/1810/261032 https://doi.org/10.17863/CAM.6210 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/261032 doi:10.17863/CAM.6210 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.6210 |
_version_ |
1789969164365987840 |