Global glacier dynamics during 100 ka Pleistocene glacial cycles
<jats:title>Abstract</jats:title><jats:p>Ice volume during the last ten 100 ka glacial cycles was driven by solar radiation flux in the Northern Hemisphere. Early minima in solar radiation combined with critical levels of atmospheric CO<jats:sub>2</jats:sub>drove initia...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/276544 2024-01-14T10:01:15+01:00 Global glacier dynamics during 100 ka Pleistocene glacial cycles Hughes, PD Gibbard, PL 2018 application/pdf https://www.repository.cam.ac.uk/handle/1810/276544 https://doi.org/10.17863/CAM.23846 eng eng Cambridge University Press (CUP) http://dx.doi.org/10.1017/qua.2018.37 Quaternary Research (United States) https://www.repository.cam.ac.uk/handle/1810/276544 doi:10.17863/CAM.23846 Glaciation orbital forcing glacial cycles ice sheets glaciers Pleistocene Article 2018 ftunivcam https://doi.org/10.17863/CAM.23846 2023-12-21T23:27:37Z <jats:title>Abstract</jats:title><jats:p>Ice volume during the last ten 100 ka glacial cycles was driven by solar radiation flux in the Northern Hemisphere. Early minima in solar radiation combined with critical levels of atmospheric CO<jats:sub>2</jats:sub>drove initial glacier expansion. Glacial cycles between Marine Isotope Stage (MIS) 24 and MIS 13, whilst at 100 ka periodicity, were irregular in amplitude, and the shift to the largest amplitude 100 ka glacial cycles occurred after MIS 16. Mountain glaciers in the mid-latitudes and Asia reached their maximum extents early in glacial cycles, then retreated as global climate became increasingly arid. In contrast, larger ice masses close to maritime moisture sources continued to build up and dominated global glacial maxima reflected in marine isotope and sea-level records. The effect of this pattern of glaciation on the state of the global atmosphere is evident in dust records from Antarctic ice cores, where pronounced double peaks in dust flux occur in all of the last eight glacial cycles. Glacier growth is strongly modulated by variations in solar radiation, especially in glacial inceptions. This external control accounts for ~50–60% of ice volume change through glacial cycles. Internal global glacier–climate dynamics account for the rest of the change, which is controlled by the geographic distributions of glaciers.</jats:p> Article in Journal/Newspaper Antarc* Antarctic Apollo - University of Cambridge Repository Antarctic |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
Glaciation orbital forcing glacial cycles ice sheets glaciers Pleistocene |
spellingShingle |
Glaciation orbital forcing glacial cycles ice sheets glaciers Pleistocene Hughes, PD Gibbard, PL Global glacier dynamics during 100 ka Pleistocene glacial cycles |
topic_facet |
Glaciation orbital forcing glacial cycles ice sheets glaciers Pleistocene |
description |
<jats:title>Abstract</jats:title><jats:p>Ice volume during the last ten 100 ka glacial cycles was driven by solar radiation flux in the Northern Hemisphere. Early minima in solar radiation combined with critical levels of atmospheric CO<jats:sub>2</jats:sub>drove initial glacier expansion. Glacial cycles between Marine Isotope Stage (MIS) 24 and MIS 13, whilst at 100 ka periodicity, were irregular in amplitude, and the shift to the largest amplitude 100 ka glacial cycles occurred after MIS 16. Mountain glaciers in the mid-latitudes and Asia reached their maximum extents early in glacial cycles, then retreated as global climate became increasingly arid. In contrast, larger ice masses close to maritime moisture sources continued to build up and dominated global glacial maxima reflected in marine isotope and sea-level records. The effect of this pattern of glaciation on the state of the global atmosphere is evident in dust records from Antarctic ice cores, where pronounced double peaks in dust flux occur in all of the last eight glacial cycles. Glacier growth is strongly modulated by variations in solar radiation, especially in glacial inceptions. This external control accounts for ~50–60% of ice volume change through glacial cycles. Internal global glacier–climate dynamics account for the rest of the change, which is controlled by the geographic distributions of glaciers.</jats:p> |
format |
Article in Journal/Newspaper |
author |
Hughes, PD Gibbard, PL |
author_facet |
Hughes, PD Gibbard, PL |
author_sort |
Hughes, PD |
title |
Global glacier dynamics during 100 ka Pleistocene glacial cycles |
title_short |
Global glacier dynamics during 100 ka Pleistocene glacial cycles |
title_full |
Global glacier dynamics during 100 ka Pleistocene glacial cycles |
title_fullStr |
Global glacier dynamics during 100 ka Pleistocene glacial cycles |
title_full_unstemmed |
Global glacier dynamics during 100 ka Pleistocene glacial cycles |
title_sort |
global glacier dynamics during 100 ka pleistocene glacial cycles |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
https://www.repository.cam.ac.uk/handle/1810/276544 https://doi.org/10.17863/CAM.23846 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/276544 doi:10.17863/CAM.23846 |
op_doi |
https://doi.org/10.17863/CAM.23846 |
_version_ |
1788067059759841280 |