Rapid coupling between ice volume and polar temperature over the past 50,000 years
Current global warming necessitates a detailed understanding of the relationships between climate and global ice volume. Highly resolved and continuous sea-level records are essential for quantifying ice-volume changes. However, an unbiased study of the timing of past ice-volume changes, relative to...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/70124 2023-05-15T13:56:44+02:00 Rapid coupling between ice volume and polar temperature over the past 50,000 years Grant, K Rohling, Eelco Bar-Matthews, M Ayalon, A Medina-Elizalde, M Ramsey, Christopher Bronk Satow, C Roberts, Andrew 2015-12-10T23:36:25Z http://hdl.handle.net/1885/70124 unknown Macmillan Publishers Ltd 0028-0836 http://hdl.handle.net/1885/70124 Nature Journal article 2015 ftanucanberra 2015-12-21T23:46:00Z Current global warming necessitates a detailed understanding of the relationships between climate and global ice volume. Highly resolved and continuous sea-level records are essential for quantifying ice-volume changes. However, an unbiased study of the timing of past ice-volume changes, relative to polar climate change, has so far been impossible because available sea-level records either were dated by using orbital tuning or ice-core timescales, or were discontinuous in time. Here we present an independent dating of a continuous, high-resolution sea-level record in millennial-scale detail throughout the past 150,000 years. We find that the timing of ice-volume fluctuations agrees well with that of variations in Antarctic climate and especially Greenland climate. Amplitudes of ice-volume fluctuations more closely match Antarctic (rather than Greenland) climate changes. Polar climate and ice-volume changes, and their rates of change, are found to covary within centennial response times. Finally, rates of sea-level rise reached at least 1.2 m per century during all major episodes of ice-volume reduction. Article in Journal/Newspaper Antarc* Antarctic Greenland ice core Australian National University: ANU Digital Collections Antarctic Greenland |
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Open Polar |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
description |
Current global warming necessitates a detailed understanding of the relationships between climate and global ice volume. Highly resolved and continuous sea-level records are essential for quantifying ice-volume changes. However, an unbiased study of the timing of past ice-volume changes, relative to polar climate change, has so far been impossible because available sea-level records either were dated by using orbital tuning or ice-core timescales, or were discontinuous in time. Here we present an independent dating of a continuous, high-resolution sea-level record in millennial-scale detail throughout the past 150,000 years. We find that the timing of ice-volume fluctuations agrees well with that of variations in Antarctic climate and especially Greenland climate. Amplitudes of ice-volume fluctuations more closely match Antarctic (rather than Greenland) climate changes. Polar climate and ice-volume changes, and their rates of change, are found to covary within centennial response times. Finally, rates of sea-level rise reached at least 1.2 m per century during all major episodes of ice-volume reduction. |
format |
Article in Journal/Newspaper |
author |
Grant, K Rohling, Eelco Bar-Matthews, M Ayalon, A Medina-Elizalde, M Ramsey, Christopher Bronk Satow, C Roberts, Andrew |
spellingShingle |
Grant, K Rohling, Eelco Bar-Matthews, M Ayalon, A Medina-Elizalde, M Ramsey, Christopher Bronk Satow, C Roberts, Andrew Rapid coupling between ice volume and polar temperature over the past 50,000 years |
author_facet |
Grant, K Rohling, Eelco Bar-Matthews, M Ayalon, A Medina-Elizalde, M Ramsey, Christopher Bronk Satow, C Roberts, Andrew |
author_sort |
Grant, K |
title |
Rapid coupling between ice volume and polar temperature over the past 50,000 years |
title_short |
Rapid coupling between ice volume and polar temperature over the past 50,000 years |
title_full |
Rapid coupling between ice volume and polar temperature over the past 50,000 years |
title_fullStr |
Rapid coupling between ice volume and polar temperature over the past 50,000 years |
title_full_unstemmed |
Rapid coupling between ice volume and polar temperature over the past 50,000 years |
title_sort |
rapid coupling between ice volume and polar temperature over the past 50,000 years |
publisher |
Macmillan Publishers Ltd |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/70124 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Greenland ice core |
genre_facet |
Antarc* Antarctic Greenland ice core |
op_source |
Nature |
op_relation |
0028-0836 http://hdl.handle.net/1885/70124 |
_version_ |
1766264315451539456 |