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Ice-shelf elevation changes due to atmospheric pressure variations


Padman, L and King, MA and Goring, D and Corr, H and Coleman, R, Ice-shelf elevation changes due to atmospheric pressure variations, Journal of Glaciology, 49, (167) pp. 521-526. ISSN 0022-1430 (2004) [Refereed Article]

DOI: doi:10.3189/172756503781830386


The inverse barometer effect (IBE) is the isostatic response of ocean surface height to changes in atmospheric pressure (Pair) at a rate of about 1 cm hPa-1. The IBE is a significant contributor to variability of ice-shelf surface elevation (ηice), as we demonstrate with simultaneous global positioning system measurements of ηice and local measurements of Pair from the Amery, Brunt and Ross Ice Shelves, Antarctica. We find that an IBE correction is justified for frequencies (ω) covering the "weather band", 0.03 < ω < 0.5 cpd (cycles per day). The IBE correction reduces the standard deviation of the weather-band signal of ηice from ∼9 cm to ∼3 cm. With this correction, the largest remaining high-frequency error signal in ηice is the inaccuracy of the present generation of Antarctic tide models, estimated to be of order 10 cm for most of Antarctica.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Glaciology
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Climate variability (excl. social impacts)
UTAS Author:King, MA (Professor Matt King)
UTAS Author:Coleman, R (Professor Richard Coleman)
ID Code:34079
Year Published:2004
Web of Science® Times Cited:44
Deposited By:Geography and Environmental Studies
Deposited On:2005-07-25
Last Modified:2013-01-15

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