Results 1 to 10 of about 6,699 (183)

Structural glaciology of Isunguata Sermia, West Greenland [PDF]

Journal of Maps, 2018
We present a 1:42,000 scale map of Isunguata Sermia, a land-terminating outlet glacier draining the western-sector of the Greenland Ice Sheet. Structure-from-Motion software applied to ∼3,600 aerial images collected by a fixed-wing unmanned aerial ...
Christine Jones, Jonathan Ryan, Tom Holt, Alun Hubbard   +3 more
doaj   +5 more sources

Stable isotope (δD–δ18O) relationships of ice facies and glaciological structures within the mid-latitude maritime Fox Glacier, New Zealand [PDF]

Annals of Glaciology, 2017
Relationships between stable isotopes (δD–δ18O), ice facies and glacier structures have hitherto gone untested in the mid-latitude maritime glaciers of the Southern Hemisphere.
John R. Appleby, Martin S. Brook, Travis W. Horton, Ian C. Fuller, Katherine A. Holt, Duncan J. Quincey   +5 more
doaj   +3 more sources

Structural evolution during a surge in the Paulabreen glacier system, Svalbard

Journal of Glaciology, 2023
We assess the evolution of glaciological structures during the 2003–05 surge in the Paulabreen glacier system, Svalbard. Glaciological structures on the glacier surface were mapped using aerial photographs captured in the early stages of the surge (2003)
Harold Lovell, Edward J. Fleming
doaj   +1 more source

Microstructures in a shear margin: Jarvis Glacier, Alaska

Journal of Glaciology, 2021
Microstructures, including crystallographic fabric, within the margin of streaming ice can exert strong control on flow dynamics. To characterize a natural setting, we retrieved three cores, two of which reached bed, from the flank of Jarvis Glacier ...
Christopher Gerbi, Stephanie Mills, Renée Clavette, Seth Campbell, Steven Bernsen, David Clemens-Sewall, Ian Lee, Robert Hawley, Karl Kreutz, Kate Hruby   +9 more
doaj   +1 more source

Thermal refraction: implications for subglacial heat flux

Journal of Glaciology, 2021
In this study, we explore small-scale (~1 to 20 km) thermal-refractive effects on basal geothermal heat flux (BGHF) at subglacial boundaries resulting from lateral thermal conductivity contrasts associated with subglacial topography and geologic contacts.
Simon Willcocks, Derrick Hasterok, Samuel Jennings   +2 more
doaj   +1 more source

Structural glaciology of Austre Brøggerbreen, northwest Svalbard [PDF]

Journal of Maps, 2015
Structural glaciological maps can be used to study the structural evolution and past dynamics of glaciers. The map described here documents the glacier-wide structural characteristics of Austre Brøggerbreen, a c. 12 km2 predominantly cold-based valley glacier in northwest Svalbard.
Stephen J. A. Jennings, Michael J. Hambrey, Neil F. Glasser, Timothy D. James, Bryn Hubbard   +4 more
openaire   +1 more source

Changes in area, flow speed and structure of southwest Antarctic Peninsula ice shelves in the 21st century

Journal of Glaciology, 2022
Since the mid-20th century, ice shelves around the Antarctic Peninsula have declined in extent and thickness, and some have shown signs of structural instability.
Tom Holt, Neil F Glasser
doaj   +1 more source

Glaciological history and structural evolution of the Shackleton Ice Shelf system, East Antarctica, over the past 60 years [PDF]

The Cryosphere, 2023
Abstract. The discovery of Antarctica's deepest subglacial trough beneath the Denman Glacier, combined with high rates of basal melt at the grounding line, has caused significant concern over its vulnerability to retreat. Recent attention has therefore been focusing on understanding the controls driving Denman Glacier's dynamic evolution.
S. S. Thompson, S. S. Thompson, B. Kulessa, B. Kulessa, A. Luckman, J. A. Halpin, J. S. Greenbaum, T. Pelle, F. Habbal, J. Guo, L. M. Jong, J. L. Roberts, B. Sun, D. D. Blankenship   +13 more
openaire   +5 more sources

Dielectric anisotropy as indicator of crystal orientation fabric in Dome Fuji ice core: method and initial results

Journal of Glaciology, 2022
Polycrystalline ice is known to exhibit macroscopic anisotropy in relative permittivity (ɛ) depending on the crystal orientation fabric (COF). Using a new system designed to measure the tensorial components of ɛ, we investigated the dielectric anisotropy
Tomotaka Saruya, Shuji Fujita, Ryo Inoue
doaj   +1 more source

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