Accession Number : ADA132219

Title :   Baroclinic Rossby Wave Signature in a General Circulation Ocean Model.

Descriptive Note : Master's thesis,


Personal Author(s) : Rutsch,Arno H

PDF Url : ADA132219

Report Date : Jun 1983

Pagination or Media Count : 71

Abstract : Monthly mean values of temperature output of a ten-year period (1969-78) from a three-dimensional primitive equation ocean model are used to compute isotherm displacements at eight selected grid points in the North Pacific Ocean. The ocean model input parameters are climatological radiation, clouds, surface air temperature, surface humidity and six-hourly synoptic winds taken from Fleet Numerical Oceanography Center analyses. The first five baroclinic modes are computed from the mean temperature profiles at the eight selected model grid points and these modes are then fit in the time domain to the isotherm displacements. The fit shows evidence of baroclinic free Rossby waves in the time domain at the selected grid points south of 40N and indicates the predominance of the first baroclinic mode. At the selected grid points north of 40N, the results are inconclusive. This is due to the longer periods required at the northern latitudes, the neglect of salinity, and masking by a strong seasonal signal caused by surface heating and cooling at higher latitudes. (Author)

Descriptors :   *Ocean models, *Rossby waves, North Pacific Ocean, Circulation, Temperature, Variations, Waves, Meteorological data, Statistical analysis

Subject Categories : Meteorology
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE