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Increased ice loading in the Antarctic Peninsula since the 1850s and its effect on glacial isostatic adjustment


Nield, GA and Whitehouse, PL and King, MA and Clarke, PJ and Bentley, MJ, Increased ice loading in the Antarctic Peninsula since the 1850s and its effect on glacial isostatic adjustment, Geophysical Research Letters, 39, (17) Article L17504. ISSN 0094-8276 (2012) [Refereed Article]

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Copyright Statement

Copyright 2012 American Geophysical Union

DOI: doi:10.1029/2012GL052559


Antarctic Peninsula (AP) ice core records indicate significant accumulation increase since 1855, and any resultant ice mass increase has the potential to contribute substantially to present-day glacial isostatic adjustment (GIA). We derive empirical orthogonal functions from climate model output to infer typical spatial patterns of accumulation over the AP and, by combining with ice core records, estimate annual accumulation for the period 1855-2010. In response to this accumulation history, high resolution ice-sheet modeling predicts ice thickness increases of up to 45 m, with the greatest thickening in the northern and western AP. Whilst this thickening is predicted to affect GRACE estimates by no more than 6.2 Gt/yr, it may contribute up to -7 mm/yr to the present-day GIA uplift rate, depending on the chosen Earth model, with a strong east-west gradient across the AP. Its consideration is therefore critical to the interpretation of observed GPS velocities in the AP

Item Details

Item Type:Refereed Article
Keywords:Antarctica; sea level; ice sheets
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Geodesy
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Understanding climate change not elsewhere classified
UTAS Author:King, MA (Professor Matt King)
ID Code:89651
Year Published:2012
Web of Science® Times Cited:32
Deposited By:Geography and Environmental Studies
Deposited On:2014-03-11
Last Modified:2022-08-31

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