Results 21 to 30 of about 538 (258)

Origin of englacial stratigraphy at three deep ice core sites of the Greenland Ice Sheet by synthetic radar modelling

Journal of Glaciology, 2022
During the past 20 years, multi-channel radar emerged as a key tool for deciphering an ice sheet's internal architecture. To assign ages to radar reflections and connect them over large areas in the ice sheet, the layer genesis has to be understood on a ...
Seyedhamidreza Mojtabavi, Olaf Eisen, Steven Franke, Daniela Jansen, Daniel Steinhage, John Paden, Dorthe Dahl-Jensen, Ilka Weikusat, Jan Eichler, Frank Wilhelms   +9 more
doaj   +1 more source

Structure and dynamics of Aldegondabreen, Spitsbergen, according to repeated GPR surveys in 1999, 2018 and 2019

Лëд и снег, 2021
Over the last decades, glaciers on Svalbard were shrinking in response to the current climate change. Most of them decreased in size, area, and surface height with a stable negative or even accelerated changes in the mass balance.
A. L. Borisik, A. L. Novikov, A. F. Glazovsky, I. I. Lavrentiev, S. R. Verkulich   +4 more
doaj   +1 more source

Radio Echo Sounding On Temperate Glaciers [PDF]

Journal of Glaciology, 1975
A high-resolution radio echo sounder operating at a frequency of 620 MHz has been developed for studies of temperate glaciers. Excellent spatial resolution is obtained through the use of a short pulse length (70 ns) and an antenna beam width of 5.2°. Large amounts of high-quality data may be rapidly collected since the sounder incorporates an automatic
openaire   +1 more source

NATIONAL SEISMIC, RADAR AND SEISMOLOGICAL STUDIES OF SUBGLACIAL LAKE VOSTOK

Лëд и снег, 2015
The results of the remote sensing which carried out in the LakeVostokarea are discussed in the paper. A.P. Kapitsa and O.G. Sorokhtin started the geophysical researches in this area in 1950s.
S. V. Popov, V. N. Masolov, V. V. Lukin, A. M. Popkov   +3 more
doaj   +1 more source

Quasi-parabolic reflecting bottom surfaces of the Drygalski Antarctic floating ice tongue

Annals of Geophysics, 2001
Very high frequency deep radio sounding systems for ice thickness measurements are practically the only useful apparatuses for large scale radar flight surveys in polar regions. The morphology of the bottom surface of an Antarctic floating ice tongue, in
E. Zuccheretti, A. Zirizzotti, I. E. Tabacco, M. Chiappini, C. Bianchi   +4 more
doaj   +1 more source

Radio echo sounding survey along the profile of the JARE-43 seismic exploration on the Mizuho Plateau, East Antarctica

Antarctic Record, 2003
A seismic exploration was conducted in the austral summer of 2001-2002 by the 43rd Japanese Antarctic Research Expedition (JARE-43) on the Mizuho Plateau, East Antarctica.
Masamitsu Takada, Shigeru Toda, Daisuke Kamiya, Takeshi Matsushima, Hiroki Miyamachi   +4 more
doaj   +1 more source

Radiofrequency ice dielectric measurements at Summit Station, Greenland

Journal of Glaciology, 2023
We recently reported on the radio-frequency attenuation length of cold polar ice at Summit Station, Greenland, based on bi-static radar measurements of radio-frequency bedrock echo strengths taken during the summer of 2021.
Juan Antonio Aguilar, Patrick Allison, Dave Besson, Abby Bishop, Olga Botner, Sjoerd Bouma, Stijn Buitink, Maddalena Cataldo, Brian A. Clark, Kenny Couberly, Zach Curtis-Ginsberg, Paramita Dasgupta, Simon de Kockere, Krijn D. de Vries, Cosmin Deaconu, Michael A. DuVernois, Anna Eimer, Christian Glaser, Allan Hallgren, Steffen Hallmann, Jordan Christian Hanson, Bryan Hendricks, Jakob Henrichs, Nils Heyer, Christian Hornhuber, Kaeli Hughes, Timo Karg, Albrecht Karle, John L. Kelley, Michael Korntheuer, Marek Kowalski, Ilya Kravchenko, Ryan Krebs, Robert Lahmann, Uzair Latif, Joseph Mammo, Matthew J. Marsee, Zachary S. Meyers, Kelli Michaels, Katharine Mulrey, Marco Muzio, Anna Nelles, Alexander Novikov, Alisa Nozdrina, Eric Oberla, Bob Oeyen, Ilse Plaisier, Noppadol Punsuebsay, Lilly Pyras, Dirk Ryckbosch, Olaf Scholten, David Seckel, Mohammad Ful Hossain Seikh, Daniel Smith, Jethro Stoffels, Daniel Southall, Karen Terveer, Simona Toscano, Delia Tosi, Dieder J. Van Den Broeck, Nick van Eijndhoven, Abigail G. Vieregg, Janna Z. Vischer, Christoph Welling, Dawn R. Williams, Stephanie Wissel, Robert Young, Adrian Zink   +67 more
doaj   +1 more source

Fifty-five years of Russian radio-echo sounding investigations in Antarctica

Annals of Glaciology, 2020
Russian (former Soviet) systematic studies of Antarctica by radio-echo sounding (RES) and ground-penetrating radar technique (GPR) were commenced in 1964.
Sergey Popov
doaj   +1 more source

Radio Echo Sounding (RES) investigations at Talos Dome (East Antarctica): bedrock topography and ice thickness

Annals of Geophysics, 2003
Radio echo sounding measurements were collected during two Antarctic expeditions to determine the ice thickness and the sub-glacial morphology of Talos Dome in the region around 72°48'S; 159°06'E (about 6400 km2) on the edge of the East ...
I. E. Tabacco, M. Frezzotti, A. Forieri, P. De Michelis, L. Cafarella, C. Bianchi, A. Zirizzotti   +6 more
doaj   +1 more source

Interpreting englacial layer deformation in the presence of complex ice flow history with synthetic radargrams

Annals of Glaciology, 2020
Fast ice flow on the Antarctic continent constitutes much of the mass loss from the ice sheet. However, geophysical methods struggle to constrain ice flow history at depth, or separate the signatures of topography, ice dynamics and basal conditions on ...
Cooper W. Elsworth, Dustin M. Schroeder, Matthew R. Siegfried   +2 more
doaj   +1 more source