Results 31 to 40 of about 226 (172)

A 1973 Gravimetric Geoid of Africa [PDF]

Geophysical Journal International, 1974
Summary Results of a preliminary gravimetric geoid computed on the Geodetic Reference System of 1967 (GRS67) are given in the form of undulation and deflection maps. For the computations, 1°× 1° mean free-air gravity anomalies formed the inner zone and 5° equal area values the outer zone around each computation point. Some of the required 1°×
openaire   +1 more source

Observations of Small‐Scale Heterogeneity in the Upper Mantle Beneath Old Oceanic Lithosphere

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract We present tomographic images of the velocity structure of the upper mantle beneath old (∼90 ${\sim} 90$ Ma) oceanic lithosphere, derived from arrival time measurements of teleseismic body waves recorded by ocean‐bottom seismometers. Differential travel time measurements on P, S, and SKS body waves across a wide range of frequency bands show ...
A. Hariharan, Z. Eilon, J. Gaherty, J. Russell, J. Phillips, D. Forsyth   +5 more
wiley   +1 more source

SWOT Global Bathymetry Modeling Using Deep Neural Networks Trained on Multiple Geophysical Features

Earth and Space Science, Volume 12, Issue 11, November 2025.
Abstract This paper presents BathDNN25, a global bathymetry model developed using gravity data derived from wide‐swath altimetry collected by the Surface Water and Ocean Topography (SWOT) mission, with shipborne bathymetry serving as training data in a deep neural network (DNN) framework.
Farshad Salajegheh, Xiaoli Deng, Ole Baltazar Andersen, Richard Coleman, Mehdi Khaki   +4 more
wiley   +1 more source

Topographic Effects in Geoid Determinations

Geosciences, 2018
Traditionally, geoid determination is applied by Stokes’ formula with gravity anomalies after removal of the attraction of the topography by a simple or refined Bouguer correction, and restoration of topography by the primary indirect topographic ...
Lars E. Sjöberg
doaj   +1 more source

Impact of SRTM and ASTER Terrain Models on Geoid Determination: A Case Study in the High‐Mountainous Region

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract An accurate geoid has important consequences for many fields such as engineering applications, underground resource exploration, geophysical surveys, etc. Its precise determination relies on two key data sets: gravity measurements and high‐resolution elevation data, both of which are critical for achieving reliable results.
Leyla Cakir
wiley   +1 more source

On the Choice of Basis Functions for Modeling Earth's Elastic Deformation Due To Surface Loading

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Accurately modeling Earth's elastic deformation due to surface loads is essential for geodetic and geophysical studies, including investigations of climate change, hydrology, and tectonics. Various basis functions, such as spherical harmonics, Green's functions, disk functions, and Slepian functions, are commonly used to describe the ...
Fan Yang, Yingchun Shen, Weihang Zhang, Ehsan Forootan   +3 more
wiley   +1 more source

A gravimetric geoid modelling for Argentina [PDF]

, 2019
La siguiente tesis presenta un nuevo geoide gravimétrico (ARG05) de alta precisión y alta exactitud para la Republica Argentina. En el mismo se discuten la metodología y los datos utilizados para su cálculo y se plantean los trabajos futuros que se realizarán con el fin de mejorar su precisión y exactitud. ARG05 es un geoide gravimétrico puro.
openaire   +3 more sources

Satellite Requirements to Capture Water Propagation in Earth's Rivers

Reviews of Geophysics, Volume 63, Issue 3, September 2025.
Abstract The water in Earth's rivers propagates as waves through space and time across hydrographic networks. A detailed understanding of river dynamics globally is essential for achieving accurate knowledge of surface water storage and fluxes to support water resources management and water‐related disaster forecasting and mitigation.
A. Cerbelaud, C. H. David, T. Pavelsky, S. Biancamaria, P.‐A. Garambois, C. Kittel, F. Papa, P. Bates, M. J. Tourian, M. Durand, R. Frasson, H. Oubanas, M. Simard, G. Schumann, G. Allen, A. Tarpanelli, S. Wongchuig, J. Wade, M. Tom, P.‐O. Malaterre, C. J. Gleason, J.‐F. Crétaux, K. Nielsen, O. Elmi, C. Schwatke, D. Scherer, L. Gal, A. Paris, A. Dasgupta, S. Munier, D. Feng, P. Bauer‐Gottwein, F. Hossain, D. Yamazaki, B. Kitambo, S. Mischel, M. Bonnema, K. Verma, K. Andreadis, N. Picot, J. Benveniste   +40 more
wiley   +1 more source

The inverse problem of constructing a gravimetric geoid

Journal of Geophysical Research: Solid Earth, 1982
Computation of a single geoidal height from gravity acceleration data formally requires that the latter be known everywhere on the earth. We present a computational procedure based on linear inverse theory for estimating geoidal heights from incomplete sets of data.
Zlotnicki, V, Parsons, B, Wunsch, C
openaire   +1 more source

The Glacier Changes in the Alps From the GRACE and GRACE Follow‐On Missions (2002–2023)

Journal of Geophysical Research: Earth Surface, Volume 130, Issue 7, July 2025.
Abstract In this paper, time‐variable gravity field data from the Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow‐On (GRACE‐FO) missions are used to quantify glacier mass changes in the Alps from 2002 to 2023. We employ a new method that utilizes the vertical surface displacement data to correct the glacial isostatic adjustment and ...
S. Liu, R. Pail
wiley   +1 more source