Results 71 to 80 of about 14,168 (295)

Quasi-static granular flow of ice mélange [PDF]

, 1936
We use Landsat 8 imagery to generate ice mélange velocity fields at Greenland’s three most productive outlet glaciers: Jakobshavn Isbræ, Helheim Glacier, and Kangerdlugssuaq Glacier.
Amundson, Jason M., Burton, J. C.
core   +1 more source

Reconstructing Early Human Subsistence in Near Oceania: New Insights From Matenkupkum and Matenbek

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT The colonization of New Ireland ~44–40,000 years ago represents the earliest evidence of human occupation in Near Oceania. Yet, the precise impacts of climatic changes on subsistence strategies during the Late Pleistocene, Last Glacial Maximum, and Holocene remain poorly understood.
Joëlle den Toom, Glenn Summerhayes, Anne Ford, Karen Greig   +3 more
wiley   +1 more source

Characterization of seismicity from different glacial bed types: machine learning classification of laboratory stick-slip acoustic emissions

Annals of Glaciology
Subglacial seismicity presents the opportunity to monitor inaccessible glacial beds at the epicentral location and time. Glaciers can be underlain by rock or till, a first order control on bed mechanics.
Seth Saltiel, Nathan Groebner, Theresa Sawi, Christine McCarthy   +3 more
doaj   +1 more source

New insights into ice accumulation at Galena Creek Rock Glacier from radar imaging of its internal structure

Journal of Glaciology, 2020
The ice-cored Galena Creek Rock Glacier, Wyoming, USA, has been the subject of a number of studies that sought to determine the origin of its ice. We present new observations of the rock glacier's internal structure from ground-penetrating radar to ...
Eric Ivan Petersen, Joseph S. Levy, John W. Holt, Cassie M. Stuurman   +3 more
doaj   +1 more source

Representing moisture fluxes and phase changes in glacier debris cover using a reservoir approach [PDF]

, 2014
Due to the complexity of treating moisture in supraglacial debris, surface energy balance models to date have neglected moisture infiltration and phase changes in the debris layer.
Brock, Benjamin, Bush, Andrew, Collier, Emily, Essery, Richard, Maussion, Fabien, Nicholson, Lindsey   +5 more
core   +1 more source

Permafrost Distribution in the Canadian Rockies: Key Variables Influencing Patch‐Scale Variability

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT The spatial distribution of permafrost in mountainous regions is influenced by various factors such as topography, climate, vegetation, and substrate. Despite the existence of comprehensive permafrost maps at national and global levels, they fail to accurately represent the patch‐scale (e.g., < 25 m) permafrost distribution in characteristic ...
Gerardo Zegers, Masaki Hayashi, Pablo A. Mendoza   +2 more
wiley   +1 more source

Brine, englacial structure and basal properties near the terminus of McMurdo Ice Shelf, Antarctica

Annals of Glaciology, 2017
We collected ~1300 km of ground-penetrating radar profiles over McMurdo Ice Shelf, Antarctica, using frequencies between 40 and 400 MHz to determine extent, continuity and depth to the brine.
S. Campbell, Z. Courville, S. Sinclair, J. Wilner   +3 more
doaj   +1 more source

Observed crustal uplift near the Southern Patagonian Icefield constrains improved viscoelastic Earth model [PDF]

, 2014
Thirty‒one GPS geodetic measurements of crustal uplift in southernmost South America determined extraordinarily high trend rates (> 35 mm/yr) in the north‒central part of the Southern Patagonian Icefield.
Casassa, G., Dietrich, R., Fritsche, M., Groh, A., Ivins, E. R., Lange, H., Richter, Andreas Jorg, Schroeder, L.   +7 more
core   +2 more sources

Spatial Variability of Permafrost and Active Layer Thickness in a Forested Hillslope of the Taiga Shield

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Under continued climate warming, understanding present‐day permafrost distribution and the controls on ground thaw are critical for predicting permafrost thaw trajectories and associated implications. This study presents a high‐resolution investigation of permafrost extent and active layer thickness (ALT) across a coniferous forested hillslope
Alana Muenchrath, Christopher Spence, Andrew Ireson   +2 more
wiley   +1 more source

Flow and retreat of the Late Quaternary Pine Island-Thwaites palaeo-ice stream, West Antarctica [PDF]

, 2010
Multibeam swath bathymetry and sub-bottom profiler data are used to establish constraints on the flow and retreat history of a major palaeo-ice stream that carried the combined discharge from the parts of the West Antarctic Ice Sheet now occupied by the ...
Alastair G. C. Graham, Alley, Anandakrishnan, Anderson, Anderson, Canals, Clark, Claus-Dieter Hillenbrand, Conway, Domack, Dowdeswell, Dowdeswell, Dowdeswell, Dowdeswell, Evans, Evans, Gerhard Kuhn, Graham, Heroy, Holt, Hubbard, Hughes, Jacobs, James A. Smith, Jeffrey Evans, Julian A. Dowdeswell, Karsten Gohl, King, Larter, Larter, Lowe, Lowe, Mosola, Nitsche, Noormets, Nygård, Ottesen, Ottesen, Payne, Pritchard, Pudsey, Rignot, Rignot, Rignot, Rignot, Rignot, Robert D. Larter, Schoof, Scott, Sharpe, Shaw, Shepherd, Shepherd, Shipp, Shipp, Smith, Stokes, Stokes, Stokes, Tara Deen, Thoma, Vaughan, Vaughan, Vaughan, Vaughan, Walker, Weertman, Wellner, Ó Cofaigh, Ó Cofaigh, Ó Cofaigh, Ó Cofaigh   +71 more
core   +1 more source