Global glacier dynamics during 100 ka Pleistocene glacial cycles
Abstract 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 2 drove initial glacier expansion. Glacial cycles between Marine Isotope Stage (MIS) 24 and MIS...
Published in: | Quaternary Research |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2018
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/qua.2018.37 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589418000376 |
id |
crcambridgeupr:10.1017/qua.2018.37 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/qua.2018.37 2024-06-23T07:45:51+00:00 Global glacier dynamics during 100 ka Pleistocene glacial cycles Hughes, Philip D. Gibbard, Philip L. 2018 http://dx.doi.org/10.1017/qua.2018.37 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589418000376 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 90, issue 1, page 222-243 ISSN 0033-5894 1096-0287 journal-article 2018 crcambridgeupr https://doi.org/10.1017/qua.2018.37 2024-06-12T04:04:25Z Abstract 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 2 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. Article in Journal/Newspaper Antarc* Antarctic Cambridge University Press Antarctic Quaternary Research 90 1 222 243 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract 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 2 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. |
format |
Article in Journal/Newspaper |
author |
Hughes, Philip D. Gibbard, Philip L. |
spellingShingle |
Hughes, Philip D. Gibbard, Philip L. Global glacier dynamics during 100 ka Pleistocene glacial cycles |
author_facet |
Hughes, Philip D. Gibbard, Philip L. |
author_sort |
Hughes, Philip D. |
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 |
http://dx.doi.org/10.1017/qua.2018.37 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589418000376 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Quaternary Research volume 90, issue 1, page 222-243 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/qua.2018.37 |
container_title |
Quaternary Research |
container_volume |
90 |
container_issue |
1 |
container_start_page |
222 |
op_container_end_page |
243 |
_version_ |
1802642651461189632 |