Global glacier dynamics during 100 ka Pleistocene glacial cycles.
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 CO2 drove initial glacier expansion. Glacial cycles between MIS 24-13, whilst at 100 ka periodicity, were i...
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Online Access: | https://research.manchester.ac.uk/en/publications/659e9a9b-f0d1-417d-b774-17513f6b257a https://doi.org/10.1017/qua.2018.37 https://pure.manchester.ac.uk/ws/files/69337432/HughesGibbard_2018.pdf |
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ftumanchesterpub:oai:pure.atira.dk:publications/659e9a9b-f0d1-417d-b774-17513f6b257a 2023-11-12T04:06:22+01:00 Global glacier dynamics during 100 ka Pleistocene glacial cycles. Hughes, Philip Gibbard, Philip L. 2018-07 application/pdf https://research.manchester.ac.uk/en/publications/659e9a9b-f0d1-417d-b774-17513f6b257a https://doi.org/10.1017/qua.2018.37 https://pure.manchester.ac.uk/ws/files/69337432/HughesGibbard_2018.pdf eng eng info:eu-repo/semantics/openAccess Hughes , P & Gibbard , P L 2018 , ' Global glacier dynamics during 100 ka Pleistocene glacial cycles. ' , Quaternary Research , vol. 90 , no. 1 . https://doi.org/10.1017/qua.2018.37 article 2018 ftumanchesterpub https://doi.org/10.1017/qua.2018.37 2023-10-30T09:15:34Z 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 CO2 drove initial glacier expansion. Glacial cycles between MIS 24-13, whilst at 100 ka periodicity, were irregular in amplitude and the shift to the largest amplitude 100 ka glacial cycles occurs 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 geographical distributions of glaciers. Article in Journal/Newspaper Antarc* Antarctic The University of Manchester: Research Explorer Quaternary Research 90 1 222 243 |
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Open Polar |
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The University of Manchester: Research Explorer |
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ftumanchesterpub |
language |
English |
description |
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 CO2 drove initial glacier expansion. Glacial cycles between MIS 24-13, whilst at 100 ka periodicity, were irregular in amplitude and the shift to the largest amplitude 100 ka glacial cycles occurs 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 geographical distributions of glaciers. |
format |
Article in Journal/Newspaper |
author |
Hughes, Philip Gibbard, Philip L. |
spellingShingle |
Hughes, Philip Gibbard, Philip L. Global glacier dynamics during 100 ka Pleistocene glacial cycles. |
author_facet |
Hughes, Philip Gibbard, Philip L. |
author_sort |
Hughes, Philip |
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. |
publishDate |
2018 |
url |
https://research.manchester.ac.uk/en/publications/659e9a9b-f0d1-417d-b774-17513f6b257a https://doi.org/10.1017/qua.2018.37 https://pure.manchester.ac.uk/ws/files/69337432/HughesGibbard_2018.pdf |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Hughes , P & Gibbard , P L 2018 , ' Global glacier dynamics during 100 ka Pleistocene glacial cycles. ' , Quaternary Research , vol. 90 , no. 1 . https://doi.org/10.1017/qua.2018.37 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/qua.2018.37 |
container_title |
Quaternary Research |
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90 |
container_issue |
1 |
container_start_page |
222 |
op_container_end_page |
243 |
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1782327462825295872 |