Results 1 to 10 of about 4,948 (179)

Glaciological Monitoring Using the Sun as a Radio Source for Echo Detection

Geophysical Research Letters, 2021
AbstractIce‐penetrating radar observations are critical for projecting ice‐sheet contribution to sea‐level rise; however, these prognostic models have significant uncertainties due to an incomplete understanding of glacial subsurface processes. Existing radars that can characterize subsurface conditions are too resource‐intensive to simultaneously ...
Peters, S. T., Schroeder, D. M., Chu, W., Castelletti, D., Haynes, M. S., Christoffersen, P., Romero‐Wolf, A.   +6 more
openaire   +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

Five decades of radioglaciology

Annals of Glaciology, 2020
Radar sounding is a powerful geophysical approach for characterizing the subsurface conditions of terrestrial and planetary ice masses at local to global scales.
Dustin M. Schroeder, Robert G. Bingham, Donald D. Blankenship, Knut Christianson, Olaf Eisen, Gwenn E. Flowers, Nanna B. Karlsson, Michelle R. Koutnik, John D. Paden, Martin J. Siegert   +9 more
doaj   +1 more source

A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling

Journal of Glaciology, 2023
Hercules Dome, Antarctica, has long been identified as a prospective deep ice core site due to the undisturbed internal layering, climatic setting and potential to obtain proxy records from the Last Interglacial (LIG) period when the West Antarctic ice ...
T. J. Fudge, Benjamin H. Hills, Annika N. Horlings, Nicholas Holschuh, John Erich Christian, Lindsey Davidge, Andrew Hoffman, Gemma K. O'Connor, Knut Christianson, Eric J. Steig   +9 more
doaj   +1 more source

The newly developed airborne radio-echo sounding system of the AWI as a glaciological tool [PDF]

Annals of Glaciology, 1999
AbstractSince 1994 the Alfred Wegener Institute (AWI) has operated an airborne radio-echo sounding system for remote-sensing studies of the polar ice caps in Antarctica and in Greenland. It is used to map ice thicknesses and internal layernigs of glaciers, ice sheets and ice shelves, and is capable of penetrating ice thicknesses of up to 4 km.
U. Nixdorf, D. Steinhage, U. Meyer, L. Hempel, M. Jenett, P. Wachs, H. Miller   +6 more
openaire   +1 more source

A comparison of automated approaches to extracting englacial-layer geometry from radar data across ice sheets

Annals of Glaciology, 2020
Radar surveys across ice sheets typically measure numerous englacial layers that can often be regarded as isochrones. Such layers are valuable for extrapolating age–depth relationships away from ice-core locations, reconstructing palaeoaccumulation ...
Richard Delf, Dustin M. Schroeder, Andrew Curtis, Antonios Giannopoulos, Robert G. Bingham   +4 more
doaj   +1 more source

A self-adaptive two-parameter method for characterizing roughness of multi-scale subglacial topography

Journal of Glaciology, 2021
During the last few decades, bed-elevation profiles from radar sounders have been used to quantify bed roughness. Various methods have been employed, such as the ‘two-parameter’ technique that considers vertical and slope irregularities in topography ...
Shinan Lang, Ben Xu, Xiangbin Cui, Kun Luo, Jingxue Guo, Xueyuan Tang, Yiheng Cai, Bo Sun, Martin J. Siegert   +8 more
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

Rock glacier composition and structure from radio wave speed analysis with dipping reflector correction

Journal of Glaciology, 2023
We assess the composition and geometry of four individual rock glaciers in Alaska, Wyoming and Colorado by measuring their radio wave speed and applying these results to ground-penetrating radar depth corrections and dielectric mixing models.
Tyler M. Meng, Eric I. Petersen, John W. Holt   +2 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