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An estimate of global absolute dynamic topographyThe absolute dynamic topography of the world ocean is estimated from the largest scales to a short-wavelength cutoff of about 6700 km for the period July through September, 1978. The data base consisted of the time-averaged sea-surface topography determined by Seasat and geoid estimates made at the Goddard Space Flight Center. The issues are those of accuracy and resolution. Use of the altimetric surface as a geoid estimate beyond the short-wavelength cutoff reduces the spectral leakage in the estimated dynamic topography from erroneous small-scale geoid estimates without contaminating the low wavenumbers. Comparison of the result with a similarly filtered version of Levitus' (1982) historical average dynamic topography shows good qualitative agreement. There is quantitative disagreement, but it is within the estimated errors of both methods of calculation.
Document ID
19840058210
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Tai, C.-K.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Wunsch, C.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
February 1, 1984
Publication Information
Publication: Journal of Physical Oceanography
Volume: 14
ISSN: 0022-3670
Subject Category
Oceanography
Accession Number
84A40997
Funding Number(s)
CONTRACT_GRANT: NAG5-307
CONTRACT_GRANT: NSF OCE-80-18514
CONTRACT_GRANT: NAG6-9
Distribution Limits
Public
Copyright
Other

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