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Detailed 1 x 1 deg gravimetric Indian Ocean geoid and comparison with GEOS-3 radar altimeter geoid profilesA new set of 1 x 1 deg mean free-air anomalies in the Indian Ocean is determined on the basis of previously published free-air anomaly maps (Talwani and Kahle, 1975) and the most recent Lamont surface ship gravity measurements. The data are then used to compute a (total) 1 x 1 deg gravimetric Indian Ocean geoid. The computation is carried out by combining the Goddard Space Flight Center (GSFC) GEM-6 geoid and a difference geoid that corresponds to the differences between the set of 1 x 1 deg surface gravity values and the GEM-6 gravity anomalies. The difference geoid is highest over the Madagascar Ridge (+20 m) and lowest over the Timor Trough (-30 m). The total geoid is compared with GEOS-3 radar altimeter-derived geoid profiles, and geophysical implications are discussed.
Document ID
19790036548
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kahle, H.-G.
(Eidgenoessische Technische Hochschule, Zurich, Switzerland; Lamont-Doherty Geological Observatory, Palisades N.Y., United States)
Chapman, M.
(Eidgenoessische Technische Hochschule Zurich, Switzerland)
Talwani, M.
(Lamont-Doherty Geological Observatory Palisades, N.Y., United States)
Date Acquired
August 9, 2013
Publication Date
December 1, 1978
Publication Information
Publication: Geophysical Journal
Volume: 55
Subject Category
Geophysics
Accession Number
79A20561
Funding Number(s)
CONTRACT_GRANT: NAS6-2519
CONTRACT_GRANT: N00014-75-C-0210
Distribution Limits
Public
Copyright
Other

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