Abstract
Abstract We present a regionalized model of ocean tidal loading effects for the Argentine-German Geodetic Observatory in La Plata. It provides the amplitudes and phases of gravity variations and vertical deformation for nine tidal constituents to be applied as corrections to the observatory’s future geodetic observation data. This model combines a global ocean tide model with a model of the tides in the Río de la Plata estuary. A comparison with conventional predictions based only on the global ocean tide model reveals the importance of the incorporation of the regional tide model. Tidal loading at the observatory is dominated by the tides in the Atlantic Ocean. An additional contribution of local tidal loading in channels and groundwater is examined. The magnitude of the tidal loading is also reviewed in the context of the effects of solid earth tides, atmospheric loading and non-tidal loads.
Highlights
We present a regionalized model of ocean tidal loading effects for the Argentine-German Geodetic Observatory in La Plata
Our results suggest that the contribution of the Río de la Plata estuary to the local tidal loading effects at the Argentine-German Geodetic Observatory (AGGO) site is small compared to that of the global ocean
The comparison of our model with conventional predictions relying purely on global ocean tide models reveals the need to incorporate a regional tide model to account for the peculiar tidal dynamics in the Río de la Plata estuary
Summary
Abstract: We present a regionalized model of ocean tidal loading effects for the Argentine-German Geodetic Observatory in La Plata. It provides the amplitudes and phases of gravity variations and vertical deformation for nine tidal constituents to be applied as corrections to the observatory’s future geodetic observation data. This model combines a global ocean tide model with a model of the tides in the Río de la Plata estuary. Tidal loading at the observatory is dominated by the tides in the Atlantic Ocean. The magnitude of the tidal loading is reviewed in the context of the effects of solid earth tides, atmospheric loading and non-tidal loads
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