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Journal Articles Journal of Geodynamics Year : 2009

Modelling atmospheric and induced non-tidal oceanic loading contributions to surface gravity and tilt measurements

Jean-Paul Boy
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Laurent Longuevergne
Frédéric Boudin
  • Function : Author
Thomas Jacob
Florent Lyard
Muriel Llubes
  • Function : Author
Nicolas Florsch
  • Function : Author
Marie-France Esnoult
  • Function : Author

Abstract

We investigate the contribution of atmospheric and its induced non-tidal oceanic loading effects on surface time-varying gravity and tilt measurements for several stations in Western Europe. The ocean response to pressure forcing can be modelled accordingly to the inverted barometer, i.e. assuming that air pressure variations are fully compensated by static sea height changes, or using ocean general circulation models. We validate two runs of the HUGO-m barotropic ocean model by comparing predicted sea surface height variations with hundred tide gauge measurements along the European coasts. We then show that global surface pressure field, as well as a barotropic high-resolution ocean model forced by air pressure and winds allow in most cases a significant reduction of the variance of gravity residuals and, to a smaller extends tilt residuals.
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Dates and versions

hal-00594413 , version 1 (20-05-2011)

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Jean-Paul Boy, Laurent Longuevergne, Frédéric Boudin, Thomas Jacob, Florent Lyard, et al.. Modelling atmospheric and induced non-tidal oceanic loading contributions to surface gravity and tilt measurements. Journal of Geodynamics, 2009, 48 (3-5), pp.182. ⟨10.1016/j.jog.2009.09.022⟩. ⟨hal-00594413⟩

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