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Satellite gravity gradiometry: Secular gravity field change over polar regions


Moore, P and King, MA, Satellite gravity gradiometry: Secular gravity field change over polar regions, Journal of Geodynamics, 49, (5) pp. 247-253. ISSN 0264-3707 (2010) [Refereed Article]

DOI: doi:10.1016/j.jog.2010.01.007


The ESA Gravity and steady state Ocean and Circulation Explorer, GOCE, mission will utilise the principle of satellite gravity gradiometry to measure the long to medium wavelengths in the static gravity field. Previous studies have demonstrated the low sensitivity of GOCE to ocean tides and to temporal gravity field variations at the seasonal scale. In this study we investigate the sensitivity of satellite gradiometry missions such as GOCE to secular signals due to ice-mass change observed in Greenland and Antarctica. We show that unaccounted ice-mass change signal is likely to increase GOCE-related noise but that the expected present-day polar ice-mass change is below the GOCE sensitivity for an 18-month mission. Furthermore, 2-3 orders of magnitude improvement in the gradiometry in future gradiometer missions is necessary to detect ice-mass change with sufficient accuracy at the spatial resolution of interest. © 2010 Elsevier Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Keywords:GOCE; Gradiometry; Gravity field; Temporal variations; gravimetry; gravity field; polar region; satellite mission; temporal variation
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Physical geography and environmental geoscience not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:King, MA (Professor Matt King)
ID Code:82149
Year Published:2010
Web of Science® Times Cited:2
Deposited By:Geography and Environmental Studies
Deposited On:2013-01-16
Last Modified:2013-01-16

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