Accession Number : ADA316656

Title :   Oceanic Response to Atmospheric Pressure Forcing.

Descriptive Note : Contract rept.,

Corporate Author : COLORADO UNIV AT BOULDER

Personal Author(s) : Whitmer, Kirk R. ; Kantha, Lakshmi H. ; Born, George

PDF Url : ADA316656

Report Date : 1996

Pagination or Media Count : 5

Abstract : The purpose of this research is to attempt to accurately model the response of the sea surface height to the inverted barometer forcing. The impetus for this research is twofold: to better understand the nature of this effect and to apply these values as improved corrections to satellite altimetry records. Currently corrections are made to the altimetry record employing a model that makes assumptions of a static atmosphere in equilibrium. These assumptions have the potential to create errors. To improve this, it was decided to employ a barotropic numerical ocean model. A North Pacific model domain was selected because of the availability of both a large deep ocean basin and numerous adjacent marginal and semienclosed seas. Model runs are also being completed to analyze not only the surface pressure's effects, but also any induced influence in conjunction with the winds. Analysis of some preliminary 1 month runs showed the errors to the static response in the semienclosed and marginal seas to be much higher than that experienced in the open basin, and in some locations the error was of a comparable magnitude. Two year runs (1993-1994) are in the process of being completed and analyzed more fully. The length and time were selected to provide information of potential annual signals and the T/P mission, respectively. The analysis includes standard deviation, Fourier Transforms, wavelets and principal component analysis (EOF's), with emphasis on the semienclosed and marginal seas. Analysis to this point shows the errors to the static response in these regions to be affected by each basin's bathymetry, shape, and flow constraints. The analysis techniques employed help to understand the specifics of these characteristics. The principal component analysis will be employed in conjunction with T/P altimetry data.

Descriptors :   *OCEAN SURFACE, *MARINE ATMOSPHERES, *GEODETIC SURVEYS, MATHEMATICAL MODELS, FOURIER TRANSFORMATION, WIND, INVERSION, BAROMETRIC PRESSURE, GEODETIC SATELLITES, ALTIMETERS, OCEAN MODELS, STANDARD DEVIATION, DEEP WATER, BASINS(GEOGRAPHIC), NORTH PACIFIC OCEAN, DEEP OCEANS, HEIGHT FINDING.

Subject Categories : Geodesy

Distribution Statement : APPROVED FOR PUBLIC RELEASE