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General Assemblies International Union of Geodesy and
Geophysics (IUGG), Birmingham,
United Kingdom, 18-30 July 1999,
Book of Abstracts, Vol. B, p. 112
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Diagnostic Model Account Barotropic
Speed Mode of Baroclinic Ocean by Satellite Altimetry Data
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Russian
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As differentiated satellite altimetry data assimilation the
diagnostic analysis of ocean dynamics gives complete hydrodynamic picture
on that moment of time or for that temporary interval, when appropriate
measurements were made. The given approach permits better to realize as
the simulated phenomena, and representation of initial information.
As an initial system of offered model equations are considered
equations of ocean dynamics in quasigeostrophic approximation. The boundary
condition on surface for vertical mode of speed fields is replaced by «firm
cover» condition, and a condition of sliding without friction is at the
bottom taken. Integrated stream function, which is necessary for account
barotropic speed mode is searched as anomaly from mean season significance.
It is reasonably safe to suggest that changes of baroclinic layer thickness
are insignificant and density anomaly linearly change by vertical from
surface significance to zero on the baroclinic layer bottom border.
The model verification was conducted on independent data:
satellite altimetry (ERM mission GEOSAT) and hydrological data (experiment
NEWFAEXP-88 the program «Sections») for polygon near island Newfoundland
in march 1988. The mean fields of dynamic topography and integrated stream
function were determined by known data file LEVITUS.
© Geophysical Center RAS, 1999 |