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Observations of the Mf ocean tide from Geosat altimetryZonal averages of the 13.66-day Mf tide are derived from one year of Geosat altimetry records. The orbit errors are reduced by 1/revolution corrections taken over long (several day) arcs. The short-period tides are removed using a model previously derived from the same data. The Mf zonal averages indicate definite nonequilibrium character at nearly all latitudes. The imaginary admittances indicate a Q of at least 8; such a value is consistent with a simplified theory of coupled gravitational and vorticity modes and suggests a value for Proudman's 'friction period' about 123 days.
Document ID
19900043987
Document Type
Reprint (Version printed in journal)
Authors
Cartwright, David E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ray, Richard D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1990
Publication Information
Publication: Geophysical Research Letters
Volume: 17
ISSN: 0094-8276
Subject Category
Oceanography
Distribution Limits
Public
Copyright
Other
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