A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change
Iceberg calving is a major component of the total mass balance of the Greenland ice sheet (GrIS). A century-long record of Greenland icebergs comes from the International Ice Patrol's record of icebergs (I48N) passing latitude 48° N, off Newfoundland. I48N exhibits strong interannual variabili...
Published in: | Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | https://eprints.lincoln.ac.uk/id/eprint/25983/ https://eprints.lincoln.ac.uk/id/eprint/25983/1/20130662.full.pdf https://doi.org/10.1098/rspa.2013.0662 |
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ftulincoln:oai:eprints.lincoln.ac.uk:25983 2023-05-15T16:26:28+02:00 A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change Bigg, G .R. Wei, H. L. Wilton, D. J. Zhao, Y. Billings, S. A. Hanna, Edward Kadirkamanathan, V. 2014-06-08 application/pdf https://eprints.lincoln.ac.uk/id/eprint/25983/ https://eprints.lincoln.ac.uk/id/eprint/25983/1/20130662.full.pdf https://doi.org/10.1098/rspa.2013.0662 en eng Royal Society of London https://eprints.lincoln.ac.uk/id/eprint/25983/1/20130662.full.pdf Bigg, G .R., Wei, H. L., Wilton, D. J., Zhao, Y., Billings, S. A., Hanna, Edward and Kadirkamanathan, V. (2014) A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 470 (2166). ISSN 1364-5021 doi:10.1098/rspa.2013.0662 cc_by CC-BY F330 Environmental Physics Article PeerReviewed 2014 ftulincoln https://doi.org/10.1098/rspa.2013.0662 2022-03-02T20:07:06Z Iceberg calving is a major component of the total mass balance of the Greenland ice sheet (GrIS). A century-long record of Greenland icebergs comes from the International Ice Patrol's record of icebergs (I48N) passing latitude 48° N, off Newfoundland. I48N exhibits strong interannual variability, with a significant increase in amplitude over recent decades. In this study, we show, through a combination of nonlinear system identification and coupled ocean-iceberg modelling, that I48N's variability is predominantly caused by fluctuation in GrIS calving discharge rather than open ocean iceberg melting. We also demonstrate that the episodic variation in iceberg discharge is strongly linked to a nonlinear combination of recent changes in the surface mass balance (SMB) of the GrIS and regional atmospheric and oceanic climate variability, on the scale of the previous 1-3 years, with the dominant causal mechanism shifting between glaciological (SMB) and climatic (ocean temperature) over time. We suggest that this is a change in whether glacial run-off or under-ice melting is dominant, respectively. We also suggest that GrIS calving discharge is episodic on at least a regional scale and has recently been increasing significantly, largely as a result of west Greenland sources. © 2014 The Author(s) Published by the Royal Society. All rights reserved. Article in Journal/Newspaper Greenland Ice Sheet Newfoundland University of Lincoln: Lincoln Repository Greenland Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 470 2166 20130662 |
institution |
Open Polar |
collection |
University of Lincoln: Lincoln Repository |
op_collection_id |
ftulincoln |
language |
English |
topic |
F330 Environmental Physics |
spellingShingle |
F330 Environmental Physics Bigg, G .R. Wei, H. L. Wilton, D. J. Zhao, Y. Billings, S. A. Hanna, Edward Kadirkamanathan, V. A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change |
topic_facet |
F330 Environmental Physics |
description |
Iceberg calving is a major component of the total mass balance of the Greenland ice sheet (GrIS). A century-long record of Greenland icebergs comes from the International Ice Patrol's record of icebergs (I48N) passing latitude 48° N, off Newfoundland. I48N exhibits strong interannual variability, with a significant increase in amplitude over recent decades. In this study, we show, through a combination of nonlinear system identification and coupled ocean-iceberg modelling, that I48N's variability is predominantly caused by fluctuation in GrIS calving discharge rather than open ocean iceberg melting. We also demonstrate that the episodic variation in iceberg discharge is strongly linked to a nonlinear combination of recent changes in the surface mass balance (SMB) of the GrIS and regional atmospheric and oceanic climate variability, on the scale of the previous 1-3 years, with the dominant causal mechanism shifting between glaciological (SMB) and climatic (ocean temperature) over time. We suggest that this is a change in whether glacial run-off or under-ice melting is dominant, respectively. We also suggest that GrIS calving discharge is episodic on at least a regional scale and has recently been increasing significantly, largely as a result of west Greenland sources. © 2014 The Author(s) Published by the Royal Society. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Bigg, G .R. Wei, H. L. Wilton, D. J. Zhao, Y. Billings, S. A. Hanna, Edward Kadirkamanathan, V. |
author_facet |
Bigg, G .R. Wei, H. L. Wilton, D. J. Zhao, Y. Billings, S. A. Hanna, Edward Kadirkamanathan, V. |
author_sort |
Bigg, G .R. |
title |
A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change |
title_short |
A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change |
title_full |
A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change |
title_fullStr |
A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change |
title_full_unstemmed |
A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change |
title_sort |
century of variation in the dependence of greenland iceberg calving on ice sheet surface mass balance and regional climate change |
publisher |
Royal Society of London |
publishDate |
2014 |
url |
https://eprints.lincoln.ac.uk/id/eprint/25983/ https://eprints.lincoln.ac.uk/id/eprint/25983/1/20130662.full.pdf https://doi.org/10.1098/rspa.2013.0662 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Newfoundland |
genre_facet |
Greenland Ice Sheet Newfoundland |
op_relation |
https://eprints.lincoln.ac.uk/id/eprint/25983/1/20130662.full.pdf Bigg, G .R., Wei, H. L., Wilton, D. J., Zhao, Y., Billings, S. A., Hanna, Edward and Kadirkamanathan, V. (2014) A century of variation in the dependence of Greenland iceberg calving on ice sheet surface mass balance and regional climate change. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 470 (2166). ISSN 1364-5021 doi:10.1098/rspa.2013.0662 |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rspa.2013.0662 |
container_title |
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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470 |
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2166 |
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20130662 |
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