New Results of Estimation of Modern Global Ultrahigh-Degree Models of the Earth’s Gravity Field in the World Ocean

With the increase in accuracy and resolution of modern global models of the Earth’s gravity field, more opportunities have appeared to use them in solving the regional gravimetric problems. At the same time, the estimates of existing models depending on the region and geomorphology, as well as methods for predicting the reliability of data in models, taking into account the scale and nature of the problem being solved, become more important. The article is devoted to new estimates of modern models of the gravity field in various regions of the World Ocean and over various geomorphological structures. The estimates were obtained by comparing the data of the most relevant models of the gravity field with the data of high-precision marine areal and route surveys carried out in all major areas of the World Ocean. Based on the results, the model field is promising and it is possible to estimate the spatial distribution of model field errors in the World Ocean. A method for efficient preliminary zoning of a model field in the ocean is proposed. The features of the development of the Earth’s gravity field models are considered, taking into account their actual accuracy and resolution, as well as the issue of general reliability of modern model data in the high-latitude Arctic.

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