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Increased ice loading in the Antarctic Peninsula since the 1850s and its effect on glacial isostatic adjustment
Citation
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
Abstract
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 |
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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 |
Downloads: | 0 |
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