Results 111 to 120 of about 8,984 (223)

Tracking the Filling, Outburst Flood and Resulting Subglacial Water Channel From a Large Canadian Arctic Subglacial Lake

Geophysical Research Letters
We use digital elevation models (DEMs) and ICESat‐2 data to study the filling and outflow from a large subglacial lake under Manson Icefield in the Canadian Arctic. When full, the lake is ∼17 × 3 km with an area of 52 km2.
Laurence Gray, Benoît Lauzon, Luke Copland, Wesley VanWychen, Christine Dow, Will Kochtitzky, Karen E. Alley   +6 more
doaj   +1 more source

Antarctic subglacial hydrology: current knowledge and future challenges [PDF]

, 2014
Flood-carved landforms across the deglaciated terrain of Victoria Land, East Antarctica, provide convincing geomorphological evidence for the existence of subglacial drainage networks beneath the Antarctic ice sheet, and motivate research into the ...
Ashmore, David W, Bingham, Robert G
core   +4 more sources

A preliminary Scanning Electron Microscope (SEM) study of magnetite surface microtextures from the Wahianoa moraines, Mt Ruapehu, New Zealand. [PDF]

, 2010
Scanning electron microscope (SEM) of quartz micro‐textures has routinely been used to identify the depositional environment of sediments in areas of former ice‐sheet glaciation.
Brook, Martin S, Mandolla, Stephanie
core  

Tectonically controlled subglacial lakes on the flanks of the Gamburtsev Subglacial Mountains, East Antarctica [PDF]

, 2006
The morphology of surface lakes strongly influences their ecology and limnology (Wetzel, 2001). This morphology is a result of both the geologic processes that produce topographic basins and the regional climatic and local hydrologic processes that ...
Bell, Robin E., Fahnestock, Mark A., Shuman, Christopher A., Studinger, Michael   +3 more
core   +2 more sources

Dynamic subglacial meltwater history archived in Antarctic subglacial lake sediments

Geological Society of America Bulletin
Abstract There is a paucity of records on decadal to millennial scales archiving the evolution of the Antarctic subglacial hydrologic system, leaving a gap in our knowledge of the links between meltwater drainage and ice behavior. We employed a suite of sedimentological and geochemical methods to assess the stratigraphic distribution of ...
Timothy D. Campbell, Mark L. Skidmore, Molly O. Patterson, John E. Dore, David M. Harwood, Amy Leventer, Alexander B. Michaud, Brad E. Rosenheim, Matthew R. Siegfried, August J. Steigmeyer, Martyn Tranter, Ryan A. Venturelli, John C. Priscu   +12 more
openaire   +2 more sources

Using Multimission Satellite Altimetry to Monitor Subglacial Hydrological Activities in the Totten Basin, East Antarctica

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
In East Antarctica, the largest thinning rates are observed at Totten Glacier in recent years. Hydrologic activity of the three active subglacial lakes (Totten1, Totten2, and Wilkes1) located on Totten Glacier may affect the ice sheet mass balance in the
Jun Liu, Lihui Chen, Denghui Tang, Huan Xie, Xiangbin Cui, Peinan Li   +5 more
doaj   +1 more source

Eurasian ice-sheet dynamics and sensitivity to subglacial hydrology

Journal of Glaciology, 2017
Ice-stream dynamics are strongly controlled by processes taking place at the ice/bed interface where subglacial water both lubricates the base and saturates any existing, underlying sediment. Large parts of the former Eurasian ice sheet were underlain by
EYTHOR GUDLAUGSSON, ANGELIKA HUMBERT, KARIN ANDREASSEN, CAROLINE C. CLASON, THOMAS KLEINER, SEBASTIAN BEYER   +5 more
doaj   +1 more source

A Second Large Subglacial Impact Crater in Northwest Greenland? [PDF]

Following the discovery of the Hiawatha impact crater beneath the northwest margin of the Greenland Ice Sheet, we explored satellite and aerogeophysical data in search of additional such craters.
Bottke, William F., Jr., Fahnestock, Mark A., Harbeck, Jeremy P., Kjaer, Kurt H., MacGregor, Joseph A., Paden, John D., Stillman, David E., Studinger, Michael   +7 more
core   +1 more source

Recent Advances in Our Understanding of the Role of Meltwater in the Greenland Ice Sheet System [PDF]

, 2017
Nienow, Sole and Cowton’s Greenland research has been supported by a number of UK NERC research grants (NER/O/S/2003/00620; NE/F021399/1; NE/H024964/1; NE/K015249/1; NE/K014609/1) and Slater has been supported by a NERC PhD studentshipPurpose of the ...
A Igneczi, A Mikkelsen, A Sole, A Sundal, AA Leeson, AAW Fitzpatrick, AG Fountain, AJ Tedstone, AJ Tedstone, AV Sundal, B Hallet, B Hasholt, B Hudson, B Kamb, BP Hubbard, C Charalampidis, C Koziol, C Miege, C Schoof, CC Clason, CE Bøggild, CF Dow, CF Dow, D As van, D Carroll, D Voytenko, DA Slater, DK Hall, DM Chandler, DM Chandler, DR Shapero, E Hanna, EM Enderlin, F Straneo, F Walter, FM Nick, GE Flowers, GH Gudmundsson, H Machguth, H Seroussi, HJ Zwally, I Bartholomew, I Joughin, I Joughin, I Joughin, IGM Wientjes, IJ Hewitt, IM Howat, IM Howat, J Fyke, J Harper, J Kingslake, JA Graly, JC Yde, JE Box, JR Hawkings, JT Andrews, K Echelmeyer, K Jezek, K Poinar, K Poinar, L Meire, LA Stevens, LC Andrews, LC Smith, M Tedesco, MA Werder, MG JA, MJ Hopwood, MJ Krawczynski, MP Bhatia, MP Lüthi, MR Broeke van den, N Selmes, NE Young, OV Sergienko, P Jansson, RJ Motyka, RL Hooke, RR Forster, RSW Wal van de, RSW Wal van de, S Gordon, S Hofer, S Sugiyama, SB Das, SH Doyle, SH Doyle, SH Doyle, SJ Palmer, SL Bevan, SL Greenwood, T Cowton, T Cowton, T Cowton, T Meierbachtol, T Moon, T Moon, T Phillips, TD James, TDL Irvine-Fynn, VW Chu, WT Pfeffer, X Fettweis   +103 more
core   +3 more sources

Short-term variability in Greenland Ice Sheet motion forced by time-varying meltwater inputs: implications for the relationship between subglacial drainage system behavior and ice velocity. [PDF]

, 2012
High resolution measurements of ice motion along a -120 km transect in a land-terminating section of the GrIS reveal short-term velocity variations (
Anderson, Andrew Sole, Bamber, Bartholomaus, Bartholomew, Bartholomew, Bartholomew, Bingham, Campbell, Catania, Clarke, Clarke, Cutler, Das, Douglas Mair, Fountain, Herring, Hewitt, Hock, Hooke, Hubbard, Hubbard, Ian Bartholomew, Iken, Iken, Iken, Iken, Joughin, Kamb, Kamb, Kamb, Mair, Matt A. King, Meehl, Nienow, Nienow, Nienow, Palmer, Parizek, Parizek, Paterson, Peter Nienow, Pimentel, Price, Raymond, Röthlisberger, Röthlisberger, Schoof, Shampine, Shepherd, Shreve, Sundal, Thomas Cowton, Van de Wal, Van de Wal, Walder, Zwally   +56 more
core   +4 more sources