Abstract
The contribution of some global bottom topography models in smoothing quantities related to the gravity field such as gravity anomalies and sea surface heights is discussed. Observed gravity anomalies or gravity anomalies derived from altimeter data and a-priori statistical characteristics of depths are used in a least squares collocation procedure in order to produce new depths in Central Mediterranean and in northern Atlantic. Different approximations of the problem are discussed, based on one- or two layer models. The estimated bathymetry is compared with existing global and regional data bases. Many features of the sea floor described by the DTMs are also shown in the estimated bathymetry. The effect of the estimated bathymetry in smoothing gravity anomalies and sea surface heights is studied using both the original and the new depths through a residual terrain modelling (RTM)-reduction.
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Arabelos, D. (1998). On The Possibility to Estimate Ocean Bottom Topography from Marine Gravity and Satellite Altimeter Data Using Collocation. In: Forsberg, R., Feissel, M., Dietrich, R. (eds) Geodesy on the Move. International Association of Geodesy Symposia, vol 119. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72245-5_13
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DOI: https://doi.org/10.1007/978-3-642-72245-5_13
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