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Altimetry, ship gravimetry, and the general circulation of the North Atlantic
Author(s) -
Zlotnicki Victor,
Marsh James G.
Publication year - 1989
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl016i009p01011
Subject(s) - altimeter , geodesy , gravimetry , geology , gravimeter , ocean surface topography , geoid , satellite altimetry , collocation (remote sensing) , sea surface height , orbit determination , geostrophic wind , gravity anomaly , geostrophic current , satellite , climatology , geophysics , remote sensing , physics , geotechnical engineering , reservoir modeling , paleontology , casing , astronomy , oil field , measured depth
Gravity accelerations estimated from satellite altimetric mean sea surfaces (Seasat and Geos‐3) are compared to ship gravity measurements. Ship gravity are closer to an estimate based on least squares collocation, orbit perturbations, altimetry and terrestrial gravity than to an estimate based on Fourier transforms, orbit perturbations and altimetry only. Both altimetric estimates yield a smoothed picture of the geostrophic component of sea surface currents in the North Atlantic when gravity acceleration data from only nine cruises are subtracted from the altimetric gravity.