Statistics – Computation
Scientific paper
Feb 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3403307m&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 3, CiteID L03307
Statistics
Computation
3
Computational Geophysics: Modeling (4255), Geodesy And Gravity: Gravity Anomalies And Earth Structure (0920, 7205, 7240), Marine Geology And Geophysics: Seafloor Morphology, Geology, And Geophysics, Geographic Location: Pacific Ocean
Scientific paper
We examine peak-to-trough gravity anomaly amplitudes over seamounts, comparing gravity derived from satellite altimetry with gravity measured by ships. We also compare amplitudes from linear and higher-order (non-linear) computations, and conclude that two-term forward modeling of seamounts should be adequate. Altimetric amplitudes are within 90% of ship amplitudes at seamounts greater than 14 km in characteristic radius. At smaller seamounts, altimetric amplitude is reduced, probably due to smoothing filters used to process the altimeter data. Perhaps fortuitously, this amplitude loss nearly matches the amplitude under-estimate that occurs if one assumes the forward model should contain only a linear term. Thus bathymetric prediction by linear filtering may do a fairly good job of resolving seamounts much smaller than 14 km in characteristic radius.
Marks Karen M.
Smith Walter H. F.
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