Results 71 to 80 of about 948 (186)

Quantifying river morphological changes using multi‐satellite observations and in situ measurements

Earth Surface Processes and Landforms, Volume 51, Issue 3, March 2026.
This study integrates optical, radar and altimetry satellite data with river gauge measurements to estimate periodically submerged riverbed topography and quantify morphological change. By linking how often water covers the riverbed with water‐level variations, erosion and deposition patterns are mapped across a reach of Jamuna River.
Tek Narayan Bhattarai, Antonio Moreno‐Rodenas, Sanjay Giri, Maarten Bakker, Amgad Omer, Allen Bateman   +5 more
wiley   +1 more source

Tracking Baseflow Supply Dynamics Using SWOT Data From Small Groundwater‐Dominated Lakes

Hydrological Processes, Volume 40, Issue 2, February 2026.
Satellite‐based measurements of groundwater flow‐through kettle lakes efficiently track dynamic groundwater storage at local to regional scales (modified from USGS Scientific Investigations Report 2011–5137). ABSTRACT In situ surface‐water monitoring strategies are biased towards larger perennial streams and lakes and are generally not designed to ...
Martin A. Briggs, Merritt E. Harlan, David M. Rey, Danielle K. Hare, Denis R. LeBlanc, David F. Boutt, Michael N. Gooseff   +6 more
wiley   +1 more source

A GOCE only gravity model GOSG01S and the validation of GOCE related satellite gravity models

Geodesy and Geodynamics, 2017
We compile the GOCE-only satellite model GOSG01S complete to spherical harmonic degree of 220 using Satellite Gravity Gradiometry (SGG) data and the Satellite-to-Satellite Tracking (SST) observations along the GOCE orbit based on applying a least-squares
Xinyu Xu, Yongqi Zhao, Tilo Reubelt, Robert Tenzer   +3 more
doaj   +1 more source

Integrating SWOT With Multi‐Source Satellite Observations for Near‐Daily Reservoir Water Level Monitoring

Water Resources Research, Volume 62, Issue 2, February 2026.
Abstract Reservoirs play a crucial role in global water resource management. Monitoring reservoir hydrologic dynamics is critical for assessing climate variability and anthropogenic regulation. However, traditional satellite altimetry faces multiple challenges hindering high frequency and accuracy water level monitoring.
Pengfei Zhan, Jida Wang, Tan Chen, Shuangxiao Luo, Kai Liu, Linghong Ke, Chenyu Fan, Yaling Lin, Chunqiao Song   +8 more
wiley   +1 more source

Evaluation of EGM2008 Within Geopotential Space from GPS, Tide Gauges and Altimetry [PDF]

, 2009
The new global Earth gravitational model EGM2008 has been evaluated within geopotential space by comparison with its predecessor EGM96 and the GRACE combination model EIGEN-GL04C.
Edwards SJ, Dayoub N, Penna NT, Moore P
core  

Evaluating SWOT in the Coastal Zone: Comparisons With Tide Gauge and Airborne LiDAR in the Bristol Channel and Severn Estuary, UK

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Traditional nadir altimeters struggle with coastal water surface elevation (WSE) measurement and fine‐scale river‐estuary interactions, due to land‐water signal interference and their wide inter‐track spacing. The wide‐swath Surface Water and Ocean Topography (SWOT) mission, using a new Ka‐band radar interferometer, aims to address these ...
Youtong Rong, Paul Bates, Jeff Neal, Paul Bell, Christine Gommenginger, Ian Dougal Lichtman, Christopher Banks, Francisco J. M. Calafat, Adrien Martin, Jennifer Brown, Richard Cooke, Christopher Balfour, Michela De Dominicis, Marta Payo Payo, Simon Williams, Laurent Amoudry, Stephen Chuter, Simon Neill, Jude Chisholm, Colin J. Gleason, John Kupiec, Matt Lewis   +21 more
wiley   +1 more source

Deep Sources of Recent Volcanism in Armenia Inferred From Ambient Noise Tomography

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract We perform Rayleigh wave ambient noise tomography to investigate crustal seismic velocity structure and sources of volcanism in Armenia. Armenia, a key part of the tectonically and volcanically active Caucasus‐Anatolia region, is actively being deformed by the ongoing Arabian‐Eurasian continental collision.
Kh. Meliksetian, L. Sargsyan, I. Koulakov, N. Toghramadjian, N. Belovezhets, Y. Berezhnev, G. Navasardyan, E. Grigoryan, A. Vasilevsky, E. Sahakyan   +9 more
wiley   +1 more source

Towards the Selection of an Optimal Global Geopotential Model for the Computation of the Long-Wavelength Contribution: A Case Study of Ghana

Geosciences, 2017
The selection of a global geopotential model (GGM) for modeling the long-wavelength for geoid computation is imperative not only because of the plethora of GGMs available but more importantly because it influences the accuracy of a geoid model.
Caleb Iddissah Yakubu, Vagner Gonçalves Ferreira, Cosmas Yaw Asante   +2 more
doaj   +1 more source

Mélange‐Driven Coupling Between the Central Pine Island Ice Shelf and the Piglet Glacier Reverses Recent Acceleration Trends

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract By analyzing velocity changes of the Pine Island Ice Shelf (PIIS) from October 2014 to August 2025 using Sentinel‐1A/B imagery, we find that the PIIS flow changed markedly over this period. A distinct slowdown occurred at the central PIIS from 14 March 2022 to 20 January 2023, during which velocities decreased from 13.15 ± 0.04 to 12.71 ± 0.17 
Yite Chien, Chunxia Zhou, Bryan Riel
wiley   +1 more source

A high-resolution gravimetric geoid model for Japan from EGM2008 and local gravity data [PDF]

Earth, Planets and Space, 2012
A high-resolution geoid model covering the four main islands of Japan has been developed on a 1 by 1.5 arc-minute grid from EGM2008 and terrestrial gravity data. The Stokes-Helmert scheme in a modified form is applied for the determination of the geoid using an empirically-determined optimal spherical cap, and Kriging is used for gridding the residual ...
Odera, Patroba Achola, Fukuda, Yoichi, Kuroishi, Yuki   +2 more
openaire   +1 more source