Results 71 to 80 of about 6,935 (225)
Impact of datum transformation on local variations of geometric geoid in Niger
Geodesy and Cartography, 2017 In this study, we have conducted an investigation on the impact of the coordinates’ transformation on local variations of geometric geoid. The study area is limited by 1°43′12″ to 4°00′37″ East and 13°01′57″ to 14°31′20″ North in the southwest of the ...
Salissou Ibrahim Yahaya +2 more
doaj +1 more source
Seismic Imaging Reveals Ongoing Modification of Craton Margins in Northeast Asia
Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.Abstract Cratonic margins are commonly modified, yet the processes responsible remain debated. The Korean Peninsula, situated between adjacent cratons, the Japan Trench, and a back‐arc system, provides a natural setting to investigate this problem. Using 4 years of dense seismic observations, we image upper‐mantle structure beneath the peninsula with P‐
Hwaju Lee +3 more
wiley +1 more source
, 2023 Geoid-quasigeoid separation term is a crucial parameter that allows the conversion between different national height systems based on geoid and quasigeoid surfaces.
Yıldız, Hasan +2 more
core +1 more source
Combination of regional and global geoid models at continental scale: application to Iranian geoid
, 2021 High precision geoid determination is a challenging task at the national scale. Many efforts have been conducted to determine precise geoid, locally or globally.
Hosseini-Asl, Mahin +2 more
core +2 more sources
Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.Abstract The Surface Water and Ocean Topography (SWOT) mission promises quasi‐global monitoring of glacial lakes, yet the elevation difference arising from its Ka‐band radar penetrating lake snow/ice cover remains unquantified. This poses a challenge to assessing their level changes.
Shuangxiao Luo +4 more
wiley +1 more source
On deglaciation-induced perturbations of the geoid [PDF]
Canadian Journal of Earth Sciences, 1986 The importance of geoid perturbations in interpreting tilts of glacial lake levels is investigated, using a representative theoretical model. It is shown that near the ice margin, the slope of the Earth's perturbed surface is everywhere large compared with the slope of the associated undulation of the geoid. Perturbations of the geoid may therefore be
openaire +2 more sources
Ecology and Evolution, Volume 16, Issue 5, May 2026.This study analyzed humpback whale occurrence off the Pacific coast of Costa Rica from 2001 to 2023, focusing on the Central America and Southeast Pacific Distinct Population Segments, using long‐term sightings and Bayesian time‐series and habitat models.
Lili Pelayo‐González +6 more
wiley +1 more source
Regional geoid model for the area of the subglacial Lake Vostok
, 2014 We present a regional geoid model for the area of Lake Vostok, Antarctica, from a combination of local airborne gravity, ice-surface and ice-thickness data and a lake bathymetry model.
Dietrich, Reinhard +3 more
core +1 more source
Investigations on the Impacts of Global Mass Density Model to Geoid Models in Java, Indonesia
GeomaticsThis study evaluates the impact of incorporating lateral mass density variations into geoid models for Java, Indonesia, aiming to enhance the accuracy of regional geoid determinations.
Quinoza Guvil +11 more
doaj +1 more source
Toward Constraining Ocean Estimates in Ice‐Covered Regions Using Sea Level Altimetry Data
Earth and Space Science, Volume 13, Issue 5, May 2026.Abstract Estimates of ice‐covered oceans are difficult to constrain using in situ observations, particularly if one needs broad spatiotemporal coverage of subsurface properties. Here we explore the value of sea level (ζ $\zeta $) data from the laser altimeter on ICESat‐2 and multi‐mission radar altimeter products distributed by the Archiving ...
Rui M. Ponte +4 more
wiley +1 more source