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Multi-scale Analysis of Marine Geoid
Pages: 28-32,42
Year: Issue:  4
Journal: Hydrographic Surveying and Charting

Keyword:  marine geoidmulti-scale analysisradial basis functionupper mantlehot spotsmid-ocean ridge;
Abstract: Using radial basis function multi-scale analysis method,the global marine geoid is decomposed into three scales successfully.The accuracy of reconstructed signal reaches about ± 0.02m,which indicates a good ability of radial basis functions in multi-scale modeling of the gravity field.The distribution and cause of geoid anomalies in different layer of upper mantle are discussed.The geoid anomalies produced by the shallower layer mainly locate on the plate boundary,which are very similar to the distribution of volcanic hot spots.The geoid anomalies generated by deeper layer,however,coincide with the mid-ocean ridge,showing a striking correlation with the mantle plume convection.Due to the combined effect of volcanic hot spot source and mantle convection,the distribution of the geoid anomalies caused by the middle layer of upper mantle is relatively scattered.
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