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Lookup NU author(s): Dr Rory Bingham
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The launch of the Gravity Recovery and Climate Experiment (GRACE) satellite mission in March 2002 has made timely the study of geophysical processes that redistribute the Earth’s mass. This study uses the Hadley Centre coupled ocean- atmosphere model HadCM3 to examine the ocean’s role in mass redistribution on inter-annual to decadal timescales. The leading empirical mode of inter-annual bottom pressure variability is a striking, basin-wide, oscillation between the Atlantic and Pacific Oceans. Our analysis suggests that this mode is primarily a wind driven phenomenon. We find some evidence for such a mode in a re-analysis of the global ocean, although the indirect nature of this evidence means no certain conclusions can yet be drawn. Thus, we consider the gravitational effects of this mode and the potential of current geodetic missions to detect it. A surprising result is that oceanic mass redistribution can lead to decadal trends in the zonal harmonic J2, with a slope of approximately one-third that observed in geodetic measurements of J2, all of which is normally attributed to post glacial rebound.
Author(s): Bingham RJ, Haines K
Editor(s): Jekeli, C; Bastos, L; Fernandes, J
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: Gravity, Geoid and Space Missions
Year of Conference: 2005
Publisher: Springer: Berlin Heidelberg
Notes: Online ISBN: 9783540269328
Library holdings: Search Newcastle University Library for this item
Series Title: International Association of Geodesy symposia