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Testing recent global ocean tide models with loading gravimetric data
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DOI：10.1016/S0079-6611(98)00014-7.png)
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As soon as altimetric data from Topex/Poseidon satellite were available, several ocean tide models were able to be constructed by different teams in response to the scientific community request. Here we present a complement to a first comparison study made with ten tidal models (LLUBES and MAZZEGA, 1996). We use five more models of which some are updated versions computed using longer time series of altimetric data. The loading tide effects predicted by these models are compared to a data base of 228 gravimetric stations provided by the International Center for Earth Tides (MELCHIOR, 1994). Global statistical tests provide us with the relative performances of the models. Merging the five new models with the ten previous models allows us to make more general conclusions. CSR3.0 (EANES, 1994) remains the best of the fifteen models for the M-2 constituent (standard deviation of 0.425 mu gal). For the O-1 constituent, Schwiderski (SCHWIDERSKI, 1980) With a standard deviation of 0.298 mu gal, gives the best results. When considering only regional subsets of gravimetric data, no ocean tide model systematically performs better than any other. (C) 1998 Elsevier Science Ltd. All rights reserved.
Keyword:
HEAT-FLOW
GRAVITY
EUROPE
EARTH
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