Zobrazeno 1 - 10
of 455
pro vyhledávání: '"Radio-Echo Sounding"'
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 13, Pp n/a-n/a (2024)
Abstract Subglacial lakes have been mapped across Antarctica with two methods, radio‐echo sounding (RES) and ice‐surface deformation. At sites where both are coincident, these methods typically provide conflicting interpretations about the ice‐
Externí odkaz:
https://doaj.org/article/71b6fdc47bc9411d86fa779dab8856cd
Autor:
Mette Kusk Gillespie, Jacob Clement Yde, Marit Svarstad Andresen, Michele Citterio, Mark Andrew Kusk Gillespie
Publikováno v:
Journal of Glaciology, Vol 69, Pp 2126-2138 (2023)
Observations remain sparse for peripheral glaciers and ice caps in Greenland. Here, we present the results of a multi-frequency radar survey of Lyngmarksbræen Ice Cap in West Greenland conducted in April 2017. Radar measurements show thick ice of up
Externí odkaz:
https://doaj.org/article/d4c6cd9ebff0424c83ac7b88baaaa474
Autor:
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
Publikováno v:
Journal of Glaciology, Vol 69, Pp 1929-1940 (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. Those data also allow stud
Externí odkaz:
https://doaj.org/article/b0aeff4095ba4d5abcd145600189daec
Autor:
Allison M. Chartrand, Ian M. Howat
Publikováno v:
Journal of Glaciology, Vol 69, Pp 1663-1676 (2023)
Estimates of ice shelf mass loss are typically based on surface height measurements, assuming hydrostatic equilibrium and estimated firn thickness. Recent investigations, however, challenge the assumption that ice shelves are freely floating, particu
Externí odkaz:
https://doaj.org/article/4429bb68ed1e4855b7a28c1a7e4118ad
Publikováno v:
Лëд и снег, Vol 63, Iss 2, Pp 174-187 (2023)
The glacier surge at Vavilov Ice Cap, Severnaya Zemlya, Russia (79°18′ N, 94°40′ E) began as early as the mid-1960s with a slow advance of its margin in the western part. Since 2012, the advance switched to the phase of catastrophic movement, w
Externí odkaz:
https://doaj.org/article/4793c85ba60d4fde97b132b2e0d424a1
Autor:
Wilfried Hagg, Christoph Mayer, Ulrich Münzer, Natalie Barbosa, Hans-Martin Schuler, Matthias Staudacher
Publikováno v:
Annals of Glaciology, Vol 64, Pp 147-155 (2023)
We use the apparent horizontal shift of an englacial tephra layer outcrop to calculate local glacier mass balance on Sléttjökull, a lobe of Mýrdalsjökull in Southern Iceland. For this approach, the dipping angle of the englacial tephra layer in t
Externí odkaz:
https://doaj.org/article/0901d18ef6eb47aab2c1e5d579b21d62
Autor:
Steven Franke, Michael Wolovick, Reinhard Drews, Daniela Jansen, Kenichi Matsuoka, Paul D. Bons
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 6, Pp n/a-n/a (2024)
Abstract Understanding the material properties and physical conditions of basal ice is crucial for a comprehensive understanding of Antarctic ice‐sheet dynamics. Yet, direct data are sparse and difficult to acquire. Here, we employ ultra‐wideband
Externí odkaz:
https://doaj.org/article/18222c2ee292489b95abd256234d9e9a
Publikováno v:
Journal of Glaciology, Vol 69, Pp 566-576 (2023)
Ice streams are warmed by shear strain, both vertical shear near the bed and lateral shear at the margins. Warm ice deforms more easily, establishing a positive feedback loop in an ice stream where fast flow leads to warm ice and then to even faster
Externí odkaz:
https://doaj.org/article/683b049a77ce49d68e1aeb41d02ba282
Autor:
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
Publikováno v:
Journal of Glaciology, Vol 69, Pp 538-550 (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 i
Externí odkaz:
https://doaj.org/article/4ca32c89cd184c8698db619daf5974dd
Publikováno v:
Лëд и снег, Vol 63, Iss 1, Pp 5-16 (2023)
Small glaciers of the Polar Urals are at the limits of their existence. Their state and changes serve as an important natural indicator of modern climatic changes. In 2019 and 2021, we performed ground-based radar studies of one of these glaciers, th
Externí odkaz:
https://doaj.org/article/ad773e572000447b9bbfa52c3ee38fb1