Results 21 to 30 of about 256 (175)

Instruments and Methods: Direct measurement of sliding at the glacier bed [PDF]

, 1994
Sliding at the base of Trapridge Glacier, Yukon Territory, Canada, was measured using a “drag spool”. We describe this simple and inexpensive instrument as well as its installation and operation.
Clarke, Garry K. G., Fischer, Urs H., Blake, Erik W.   +2 more
core   +2 more sources

Sedimentological characterization of Antarctic moraines using UAVs and Structure-from-Motion photogrammetry [PDF]

, 2015
In glacial environments particle-size analysis of moraines provides insights into clast origin, transport history, depositional mechanism and processes of reworking.
Westoby, Matt, Sugden, David, Dunning, Stuart, Woodward, John, Winter, Kate, Hein, Andrew, Marrero, Shasta, Hein, Andrew; id_orcid   +7 more
core   +2 more sources

A stratigraphy-based method for reconstructing ice core orientation

Annals of Glaciology, 2021
Ever since the first deep ice cores were drilled, it has been a challenge to determine their original, in-situ orientation. In general, the orientation of an ice core is lost as the drill is free to rotate during transport to the surface. For shallow ice
Julien Westhoff, Nicolas Stoll, Steven Franke, Ilka Weikusat, Paul Bons, Johanna Kerch, Daniela Jansen, Sepp Kipfstuhl, Dorthe Dahl-Jensen   +8 more
doaj   +1 more source

Automatic mapping and geomorphometry extraction technique for crevasses in geodetic mass-balance calculations at Haig Glacier, Canadian Rockies

Journal of Glaciology, 2019
Finely resolved geodetic data provide an opportunity to assess the extent and morphology of crevasses and their change over time. Crevasses have the potential to bias geodetic measurements of elevation and mass change unless they are properly accounted ...
Marzieh Foroutan, Shawn J. Marshall, Brian Menounos   +2 more
doaj   +1 more source

Assessing the continuity of the blue ice climate record at Patriot Hills, Horseshoe Valley, West Antarctica [PDF]

, 2016
We use high resolution Ground Penetrating Radar (GPR) to assess the continuity of the Blue Ice Area (BIA) horizontal climate record at Patriot Hills, Horseshoe Valley, West Antarctica.
Turney, Chris S. M., Turney, Chris, Nicholas R. Golledge, Golledge, NR ; https://orcid.org/, Dunning, SA, Fogwill, CJ ; https://orcid.org/, Ross, N, Hein, AS, Winter, K, Marrero, Shasta M., Winter, Kate, Marrero, SM, Hein, Andrew, Golledge, Nicholas R., Kate Winter, Dunning, Stuart A., Hein, Andrew S., Christopher J. Fogwill, Fogwill, Christopher, Fogwill, Christopher J., Hein, Andrew; id_orcid, Woodward, J, Chris S. M. Turney, Sugden, David, Bingham, RG, Andrew S. Hein, Woodward, John, Golledge, Nicholas, Sugden, DE, Ross, Neil, Marrero, Shasta, Bingham, Robert, Shasta M. Marrero, Sugden, David E., Robert G. Bingham, Dunning, Stuart, John Woodward, Turney, Chris S. M.; id_orcid, Neil Ross, David E. Sugden, Stuart A. Dunning, Bingham, Robert G., Turney, C ; https://orcid.org/   +42 more
core   +1 more source

Spatio-temporal variability of surface mass balance in the accumulation zone of the Mer de Glace, French Alps, from multitemporal terrestrial LiDAR measurements

Journal of Glaciology, 2021
Spatio-temporal variability of the winter surface mass balance is a major uncertainty in the modelling of annual surface mass balance. Moreover, its measurement at high spatio-temporal resolution (sub-200 m) is very useful to force, calibrate or validate
Marion Réveillet, Christian Vincent, Delphine Six, Antoine Rabatel, Olivier Sanchez, Luc Piard, Olivier Laarman   +6 more
doaj   +1 more source

Instruments and Methods: A Digital Low-Frequency, Surface-Profiling Ice-Radar System

, 1990
A new short-pulse digital profiling radar system that operates at lower frequencies than most ice radars used in polar regions to date has been designed and built by the U.S. Geological Survey.
David L. Wright, Thomas P. Grover, Jerry A. Bradley, Steven M. Hodge, Robert W. Jacobel   +4 more
core   +2 more sources

Measuring seismic attenuation in polar firn: method and application to Korff Ice Rise, West Antarctica

Journal of Glaciology, 2023
We present seismic measurements of the firn column at Korff Ice Rise, West Antarctica, including measurements of compressional-wave velocity and attenuation.
Ronan S. Agnew, Roger A. Clark, Adam D. Booth, Alex M. Brisbourne, Andrew M. Smith   +4 more
doaj   +1 more source

Geothermal heat flow from borehole measurements at the margin of Princess Elizabeth Land (East Antarctic Ice Sheet)

Journal of Glaciology, 2023
A 198.8 m deep borehole was drilled through ice to subglacial bedrock in the northwestern marginal part of Princess Elizabeth Land, ~12 km south of Zhongshan Station, in January–February 2019. Three years later, in February 2022, the borehole temperature
Pavel G. Talalay, Da Gong, Xiaopeng Fan, Yazhou Li, German Leitchenkov, Bing Li, Nan Zhang, Rusheng Wang, Yang Yang, Jialin Hong   +9 more
doaj   +1 more source

Instruments and Methods: Portable Thermal Core Drill for Temperate Glaciers [PDF]

, 1964
In the summer of 1962 a completely portable and relatively simple electrically heated thermal core drill of new design was constructed and used to obtain 16 oriented samples of ice 2.5 cm. in diameter by 120 cm.
W. B. Kamb, R. L. Shreve
core   +2 more sources