Results 91 to 100 of about 5,343,927 (201)

Supraglacial Lake Drainage: from process puzzle to subglacial diagnostic

Supraglacial lake drainages are isolated events that deliver the largest observable fluxes of surface melt to the ice-sheet bed. This talk will present advances in the study of these lake drainages, through which we piece together an empirical understanding of glacier hydrology.
Stevens, LA, Banwell, AF, Behn, MD, Chase, DL, Das, SB, Dell, RL, Falconer, E, Joughin, IR, Lai, C-Y, Larochelle, S, Lu, GJ, McGuire, JJ, Nettles, M, Okal, M, Rines, J, Willis, IC   +15 more
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Mineral deformation and subglacial processes on ice-bedrock interface of Hailuogou Glacier

Chinese Science Bulletin, 2009
Hailuogou Glacier is located in a warm and humid maritime environment. It is large and moves very fast. The bottom of the glacier slides intensively and the temperature at the bottom approaches the pressure melting point. Therefore, there are abundant melting water and debris which act as effective “grinding tools” for glacial abrasion.
GengNian Liu, YiXin Chen, Yue Zhang, HaiRong Fu   +3 more
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Freezing Fronts and their Possible Influence upon Processes of Subglacial Erosion and Deposition [PDF]

Annals of Glaciology, 1981
Recent studies have shown the important influence of pore-water movement and the subglacial thermal regime on processes of erosion and deposition at the subglacial interface. the influence of migrating freezing fronts within subglacial material has been largely ignored. the phenomena of ice-water interface processes will be examined and their relevance
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Variability in ice motion at a land-terminating Greenlandic outlet glacier: the role of channelized and distributed drainage systems

Journal of Glaciology, 2016
We use a combination of field observations and hydrological modelling to examine the mechanisms through which variability in meltwater input affects ice motion at a land-terminating Greenlandic outlet glacier. We find a close agreement between horizontal
TOM COWTON, PETER NIENOW, ANDREW SOLE, IAN BARTHOLOMEW, DOUGLAS MAIR   +4 more
doaj   +1 more source

Insights into glacial processes from micromorphology of silt-sized sediment [PDF]

The Cryosphere
Silt-rich meltwater plume deposits (MPDs) analyzed from marine sediment cores have elucidated relationships that are clearly connected, yet difficult to constrain, between subglacial hydrology, ice-marginal landforms, and grounding-zone retreat patterns ...
A. P. Lepp, L. E. Miller, J. B. Anderson, M. O'Regan, M. C. M. Winsborrow, J. A. Smith, C.-D. Hillenbrand, J. S. Wellner, L. O. Prothro, E. A. Podolskiy   +9 more
doaj   +1 more source

Topography and accumulation rate as controls of asynchronous surging behaviour in the eastern and western branches of the Western Kunlun Glacier, Northwestern Tibetan Plateau

International Journal of Digital Earth
The western Kunlun main peak region is among the areas in High Mountain Asia where surge-type glaciers are highly concentrated. Here, we analyse the surging characteristics of the eastern and western branches of the Western Kunlun Glacier and the factors
Yongpeng Gao, Pengbin Liang, Miaomiao Qi, Xiaojun Yao, Xinggang Ma, Jianxin Mu, Lintao Li   +6 more
doaj   +1 more source

Glacial erosion: status and outlook

Annals of Glaciology, 2019
Glacier-erosion rates range across orders of magnitude, and much of this variation cannot be attributed to basal sliding rates. Subglacial till acts as lubricating ‘fault gouge’ or ‘sawdust’, and must be removed for rapid subglacial bedrock erosion. Such
R. B. Alley, K. M. Cuffey, L. K. Zoet
doaj   +1 more source

Dendritic subglacial drainage systems in cold glaciers formed by cut-and-closure processes

, 2014
The routing and storage of meltwater and the configuration of drainage systems in glaciers exert a profound influence on glacier behaviour. However, little is known about the hydrological systems of cold glaciers, which form a significant proportion of the total glacier population in the climate sensitive region of the High Arctic.
Naegeli, Kathrin, Lovell, Harold, Zemp, Michael, Benn, Douglas I   +3 more
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Subglacial landforms as proxy for offshore freshened groundwater in formerly glaciated margins

Communications Earth & Environment
Offshore freshened groundwater (OFG) is a significant yet underexplored component of the global water cycle, and its spatial distribution, particularly its links to past glacial processes, remains poorly constrained.
Arne Lohrberg, Amir Haroon, Nils Moosdorf, Henrik Grob, Emma Hadré, Carolin Wallmeier, Anna Eliana Pastoressa, Aaron Micallef, Sebastian Krastel   +8 more
doaj   +1 more source

A lee-side cavity fill diamicton under the Durance valley glacier: Insights from hoodoos of the Remollon Arch, Southern French Alps

Sedimentologika
Deep and narrow gullies dissecting reliefs of the Southern French Alps are filled with 10's to 100's meters thick accumulation of unsorted, boulder-rich muddy material (i.e., diamicton) left behind by glaciers that repeatedly covered the region during ...
Pierre Dietrich, Alexis Nutz
doaj   +1 more source