Results 71 to 80 of about 256 (175)

An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics

Journal of Glaciology, 2017
Fine resolution topographic data derived from methods such as Structure from Motion (SfM) and Multi-View Stereo (MVS) have the potential to provide detailed observations of geomorphological change, but have thus far been limited by the logistical ...
JOSEPH MALLALIEU, JONATHAN L. CARRIVICK, DUNCAN J. QUINCEY, MARK W. SMITH, WILLIAM H.M. JAMES   +4 more
doaj   +1 more source

Velocity estimation in GPR data based on diffraction analysis: Methodology and application to Antarctic firn

Near Surface Geophysics, Volume 24, Issue 2, Page 170-186, April 2026.
Abstract This study presents a methodological framework for estimating electromagnetic wave velocities in ground‐penetrating radar (GPR) data based exclusively on the analysis of diffractions. The approach integrates diffraction separation using the plane wave destruction algorithm and subsequent velocity refinement through the residual diffraction ...
Ian E. Vogado, José Jadsom S. Figueiredo, Jandyr M. Travassos, Saulo S. Martins   +3 more
wiley   +1 more source

Turbulent snow transport and accumulation: New reduced‐order models and diagnostics

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 776, April 2026 Part A.
Our new reduced‐order models of snow particle transport provide high‐fidelity calculations of snow accumulation in turbulent flows at significantly reduced computational costs. Additional accumulation diagnostics from the reduced‐order model predict complex patterns of particle concentration in turbulent boundary layers via coherent flow structures in ...
Nikolas O. Aksamit, Alex P. Encinas‐Bartos, Holt Hancock, Alexander Prokop   +3 more
wiley   +1 more source

Probing the firn refractive index profile using antenna response

Journal of Glaciology
The Radio Neutrino Observatory-Greenland (RNO-G, at Summit Station) experiment comprises an extensive fat-dipole antenna array deployed into ice boreholes over an eventual area of approximately 35 km2.
Sanyukta Agarwal, J.A Aguilar, Nathaniel Alden, Shoukat Ali, Patrick Allison, Michael Betts, Dave Besson, Abby Bishop, Olga Botner, Sjoerd Bouma, Stijn Buitink, Ruben Camphyn, Simone Chiche, Brian Clark, Alan Coleman, Kenny Couberly, Simon De Kockere, Krijn deVries, Cosmin Deaconu, Pawan Giri, Christian Glaser, Thorsten Glusenkamp, Allan Hallgren, Steffen Hallmann, Jordan Christian Hanson, Bryan Hendricks, Jakob Henrichs, Nils Heyer, Christian Hornhuber, Enrique Huesca Santiago, Kaeli Hughes, Timo Karg, Albrecht Karle, John Kelly, Michael Korntheuer, Marek Kowalski, Ilya Kravchenko, Ryan Krebs, Robert Lahmann, Martin Liu, Matthew J Marsee, Curtis McLennan, Masha Mikhailova, Katharine Mulrey, Marco Muzio, Anna Nelles, Alexander Novikov, Alisa Nozdrina, Eric Oberla, Bob Oeyen, Noppadol Punsuebsay, Lilly Pyras, Martin Ravn, Dirk Ryckbosh, Felix Schluter, Olaf Scholten, David Seckel, Mohammad Ful Hossain Seikh, Julia Stachurska, Jethro Stoffels, Simona Toscano, Delia Tosi, James Tutt, Dieder Van den Broeck, Nick van Eijndhoven, Abigail G. Vieregg, Aishwarya Vijai, Christoph Welling, Dawn Williams, Philipp Windischhofer, Stephanie Wissel, Robert Young, Adrian Zink   +72 more
doaj   +1 more source

Instruments and Methods Snow Density Profiling by Nuclear Means

, 1966
During the period 8–19 May 1963 a preliminary field investigation was conducted in Greenland to determine the feasibility of using a nuclear technique to determine snow and ice density profiles.
Robert D. Leighty
core   +1 more source

Instruments and Methods: A Simple Thermal Ice Drill

, 1963
A thermal ice drill using a silicon carbide electrical resistance element has been developed. The silicon carbide element is operated bare in water, permitting a very simple and efficient drill design. Maximum operating power density in these elements is
E. LaChapelle
core   +1 more source

Lidar-based snow monitoring from aerial lifts: Gondola deployment in the Austrian Alps

Journal of Glaciology
Monitoring snow distribution in alpine terrain is critical for hydrology, avalanche safety, and climate research, yet traditional surveys are costly, hazardous, and spatially sparse.
Berin Dikic, Thomas Goelles, Christoph Gaisberger, Birgit Schlager, Stefan Muckenhuber, Pedro Batista, Markus Keuschnig, Markus Schratter   +7 more
doaj   +1 more source

Development of the British Antarctic Survey Rapid Access Isotope Drill

Journal of Glaciology, 2019
The British Antarctic Survey Rapid Access Isotope Drill is an innovative new class of electromechanical ice drill, which has recently been used to drill the deepest dry hole drilled by an electromechanical auger drill. The record-breaking depth of 461.58
JULIUS RIX, ROBERT MULVANEY, JIALIN HONG, DAN ASHURST   +3 more
doaj   +1 more source

Calving of Fuerza Aérea Glacier (Greenwich Island, Antarctica) observed with terrestrial laser scanning and continuous video monitoring

Journal of Glaciology, 2016
A short-term series of quantitative observations of calving activity of Fuerza Aérea Glacier (Greenwich Island, the South Shetland Islands, Antarctica) was conducted in order to test new methods of monitoring calving.
MICHAŁ PĘTLICKI, CHRISTOPHE KINNARD
doaj   +1 more source

Instruments and Methods: Radio-Echo Equipment for Depth Sounding of Temperate Glaciers

, 1980
Radio echo-sounding equipment has been designed, and used for depth sounding on temperate glaciers in Iceland. Two devices have been built. Mark I operates in the frequency band 2 to 5 MHz. The overall range is 100 to 1000 m.
Helgi Björnsson, Ævar Jóhannesson, Marteinn Sverrisson   +2 more
core   +1 more source