Results 31 to 40 of about 1,133,916 (282)

Morphology of bottom surfaces of glacier ice tongues in the East Antarctic region

Annals of Geophysics, 2001
During three Antarctic summer campaigns (1995/97/99) Radio Echo Sounding (RES) system data from some glacier ice tongues in the East Antarctic regions between Victoria Land and George V Land were collected.
E. Zuccheretti, A. Zirizzotti, A. Passerini, I. E. Tabacco, M. Chiappini, C. Bianchi   +5 more
doaj   +1 more source

Anisotropic scattering in radio-echo sounding: insights from northeast Greenland [PDF]

The Cryosphere
Anisotropic scattering and birefringence-induced power extinction are two distinct mechanisms affecting the azimuthal power response in radio-echo sounding (RES) of ice sheets.
T. A. Gerber, T. A. Gerber, D. A. Lilien, D. A. Lilien, N. F. Nymand, D. Steinhage, O. Eisen, O. Eisen, D. Dahl-Jensen, D. Dahl-Jensen   +9 more
doaj   +1 more source

Acidity Levels in Ice Sheets from Radio Echo-Sounding

, 1982
It has been suggested (Hammer 1977, Gudmandsen and Overgaard 1978, Millar 1981) that layers of acidic ice, formed after large volcanic eruptions, are a cause of radio echo layering.
D. H. M. Millar
core   +2 more sources

Hydrothermal structure of a polythermal glacier in Spitsbergen by measurements and numerical modeling

Лëд и снег, 2016
Thickness of the upper cold ice layer in the ablation area of the polythermal glacier Grønfjordbreen (Spitsbergen) was estimated by means of numerical modeling.
A. V. Sosnovsky, Yu. Ya. Macheret, A. F. Glazovsky, I. I. Lavrentiev   +3 more
doaj   +1 more source

Statistical Method of Radio-Echo Sounding Temperate Mountain Glaciers and Portable Equipment for That

, 1975
Field experimental data show the possibility of using standard radio-echo sounding equipment of relatively low power to sound through a temperate mountain glacier.
L. A. Suchanov
core   +2 more sources

Deep multi-scale learning for automatic tracking of internal layers of ice in radar data

Journal of Glaciology, 2021
In this study, our goal is to track internal ice layers on the Snow Radar data collected by NASA Operation IceBridge. We examine the application of deep learning methods on radar data gathered from polar regions.
Maryam Rahnemoonfar, Masoud Yari, John Paden, Lora Koenig, Oluwanisola Ibikunle   +4 more
doaj   +1 more source

Polarization Changes of Radio Signals in Vertical Radio-Echo Sounding of Glaciers [PDF]

Journal of Glaciology, 1975
An electromagnetic linearly-polarized signal transmitted through the glacier in a vertical direction, reflected from the bedrock, and received with a receiving antenna, is found to be changed into one either partially or elliptically polarized. The polarization changes are believed to be due mainly to the crystal structure of the glacier and anisotropy
V. V. Bogorodskiy, G. V. Trepov, B. A. Fedorov   +2 more
openaire   +1 more source

Radio-echo sounding isochrone depths in the East Antarctic Ice Sheet

, 2018
Radio-echo sounding isochrone depths in the East Antarctic Ice ...
Creyts, Timothy T, Timothy T Creyts (7885163), Winter, Anna, Anna Winter (7885160), Daniel Steinhage (6969563), Olaf Eisen (6977588), Steinhage, Daniel, Eisen, Olaf   +7 more
core   +1 more source

Radio-Echo Sounding: Glaciological Interpretations and Applications [PDF]

Journal of Glaciology, 1975
AbstractAfter a brief review of factors relevant to the propagation of radio waves in ice, problems of profiling the upper and bedrock surfaces of ice sheets are considered. These include deconvolution of echo traces and accurate navigation. Results already available not only provide knowledge of sub-ice geomorphology, but also confirm our general ...
openaire   +1 more source

Accidents and opportunities: a history of the radio echo-sounding of Antarctica, 1958–79 [PDF]

The British Journal for the History of Science, 2008
AbstractThis paper explores the history of radio echo-sounding (RES), a technique of glaciological surveying that from the late 1960s has been used to examine Antarctica's sub-glacial morphology. Although the origins of RES can be traced back to two accidental findings, its development relied upon the establishment of new geopolitical conditions, which
Siegert, Martin, Turchetti, S., Dean, K., Naylor, S.   +3 more
openaire   +3 more sources