Modelling atmospheric and induced non-tidal oceanic loading contributions to surface gravity and tilt measurements - Archive ouverte HAL Access content directly
Journal Articles Journal of Geodynamics Year : 2009

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

(1, 2) , (3, 4) , (5) , (5) , (6) , (6) , (7) , (8)
1
2
3
4
5
6
7
8

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.Wevalidate two runs of theHUGO-mbarotropic 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. Wefinally show that precise gravity measurements with superconducting gravimeters allow the observation of large storm surges, occurring in the North Sea, even for inland stations. However, we also confirm that the continental hydrology contribution cannot be neglected. Thanks to their specific sensitivity feature, only tiltmeters closest to the coast can clearly detect the loading due to these storm surges.
Fichier principal
Vignette du fichier
ETS2008_BOY.pdf (544.06 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-00708046 , version 1 (14-06-2012)

Identifiers

Cite

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, pp.182-188. ⟨10.1016/J.JOG.2009.09.022⟩. ⟨hal-00708046⟩
489 View
550 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More