The Estimation of Mean Gravity Anomalies at Sea from Other Geophysical Phenomena.
OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE
Pagination or Media Count:
A review of the literature shows there exists a correlation between free-air anomalies and depth of water in ocean areas, on both a global and a local scale. Woollard shows that a more fundamental relationship exists with crustal age, and Daugherty has some success in predicting gravity from crustal age in the North East Pacific region. A prediction using collocation is performed with the same data, and similar results are obtained. However, the success of this approach is limited by the complexity of the tectonic and geophysical components in the oceans sub-strata. It appears that geophysical prediction techniques at sea will be of less importance than previously in areas where reliable satellite altimetry is available. In such cases, the gravity field deduced from altimetry will assist in the interpretation of the tectonic and geophysical nature of the ocean floor and its sub-strata. Author