Results 131 to 140 of about 95,350 (324)

Use of LiDAR to derive a new model of glacial hydro‐dynamic events shaping southern Ontario landscapes, Canada

Boreas, EarlyView.
High‐resolution LiDAR data with field validation of inferred southern Ontario ice stream terrains indicate that steady‐state ice streaming is difficult to reconcile with our observations. Rather, these new observations show strong evidence of significant fluvial scouring across the area in which meltwater sheet flow overtopped the landscape.
David R. Sharpe, Chris C. Smart
wiley   +1 more source

Dark ice dynamics of the south-west Greenland Ice Sheet [PDF]

The Cryosphere, 2017
Abstract. Runoff from the Greenland Ice Sheet (GrIS) has increased in recent years due largely to declining albedo and enhanced surface melting. Some of the largest declines in GrIS albedo have occurred in the ablation zone of the south-west sector and are associated with the development of 'dark' ice surfaces. Field observations at local scales reveal
A. J. Tedstone, J. L. Bamber, J. M. Cook, C. J. Williamson, X. Fettweis, A. J. Hodson, A. J. Hodson, M. Tranter   +7 more
openaire   +9 more sources

Using glacier seismicity for phase velocity measurements and Green's function retrieval [PDF]

, 2017
High-melt areas of glaciers and ice sheets foster a rich spectrum of ambient seismicity. These signals not only shed light on source mechanisms (e.g. englacial fracturing, water flow, iceberg detachment, basal motion) but also carry information about ...
Kilb, Debi, Lecointre, Albanne, Roeoesli, Claudia, Roux, Philippe, Roux, Pierre-François, Walter, Fabian   +5 more
core   +1 more source

Update of annual calving front lines for 47 marine terminating outlet glaciers in Greenland (1999–2018)

Geological Survey of Denmark and Greenland Bulletin, 2019
The Greenland ice sheet has been losing mass in response to increased surface melting (Khan et al. 2015; van den Broeke et al. 2017) as well as discharge of ice from marine terminating outlet glaciers (van den Broeke et al. 2009; Box et al. 2018). Marine
Jonas K Andersen, Robert S Fausto, Karina Hansen, Jason E Box, Signe B Andersen, Andreas P Ahlstrøm, Dirk van As, Michele Citterio, William Colgan, Nanna B Karlsson, Kristian K Kjeldsen, Niels J Korsgaard, Signe H Larsen, Kenneth D Mankoff, Allan Ø Pedersen, Christopher L Shields, Anne Solgaard, Baptiste Vandecrux   +17 more
doaj   +1 more source

CMIP5 model selection for ISMIP6 ice sheet model forcing: Greenland and Antarctica

The Cryosphere, 2019
. The ice sheet model intercomparison project for CMIP6 (ISMIP6) effort brings together the ice sheet and climate modeling communities to gain understanding of the ice sheet contribution to sea level rise.
A. Barthel, Cécile Agosta, C. Little, T. Hattermann, N. Jourdain, H. Goelzer, S. Nowicki, H. Seroussi, F. Straneo, T. Bracegirdle   +9 more
semanticscholar   +1 more source

Living on the edge: Pleistocene ice‐free refugia and collared lemming (Dicrostonyx sp.) in the North American High Arctic

Boreas, EarlyView.
Comparing the morphological variation of North American collared lemming with climatic and geographic features, as well as genetic insight and the ice sheet extend, indicate the strong geographic structure underlying the morphological diversity of the genus, that might be linked with a local Pleistocene survival in the High Arctic.
Louis Arbez, Aurelien Royer, Benjamin Pohl, Jean‐François Buoncristiani, Sophie Montuire   +4 more
wiley   +1 more source

Basal ice microbiology at the margin of the Greenland ice sheet [PDF]

Annals of Glaciology, 2010
AbstractBasal ice at the margin of the Greenland ice sheet was studied with respect to its physical characteristics and microbiological community. The basal ice contained high concentrations of dissolved ferrous Fe and must therefore be anoxic. Oxygen consumption experiments indicate that 50% of the oxidation was due to biological activity while the ...
Yde, Jacob C., Finster, Kai W., Raiswell, Rob, Steffensen, Jørgen P., Heinemeier, Jan, Olsen, Jesper, Gunnlaugsson, Haraldur P., Nielsen, Ole B.   +7 more
openaire   +4 more sources

Extensive retreat of Greenland tidewater glaciers 2000-2010 [PDF]

, 2015
Overall mass loss from the Greenland ice sheet nearly doubled during the early 2000s resulting in an increased contribution to sea-level rise, with this step-change being mainly attributed to the widespread frontal retreat and accompanying dynamic ...
A. D. Booth, A. Goldsack, A. J. Luckman, A. L. Hughes, Amundson J. M., Benn D. I., Bevan S. L., Box J. E., Chen J. L., Christoffersen P., Church J. A., Clarke G. K. C., Enderlin E. M., Fetterer F., Hanna E., Harig C., Holland D. M., Howat I. M., Howat I. M., Howat I. M., Howat I. M., J. Bradley, J. McGovern, Jiskoot H., Joughin I., Joughin I., K. Scharrer, Khan S. A., L. Cordero Llana, L. Dyke, Lea J. M., Luckman A., Luthcke S. B., McFadden E. M., Moon T., Moon T., Mote T. L., Motyka R. J., Murray T., N. Selmes, Pritchard H. D., Rignot E., S. Cook, S. L. Bevan, Sasgen I., Schild K. M., Schrama E. J. O., Sciascia R., Seale A., Straneo F., Straneo F., Sutherland D. A., T. D. James, T. Murray, Tedesco M., Tucker C. J., van den Broeke M., Walsh K. M., Wijedasa L. S., Wouters B., Y. Drocourt   +60 more
core   +1 more source

The Influence of Hydrology on the Dynamics of Land-Terminating Sectors of the Greenland Ice Sheet

Frontiers in Earth Science, 2019
Coupling between runoff, hydrology, basal motion, and mass loss (“hydrology-dynamics”) is a critical component of the Greenland Ice Sheet system. Despite considerable research effort, the mechanisms by which runoff influences ice dynamics and the net ...
B. Davison, A. Sole, S. Livingstone, T. Cowton, P. Nienow   +4 more
semanticscholar   +1 more source

Morphology and sedimentology of murtooized terrain on the southern Fraser Plateau, British Columbia, Canada

Boreas, EarlyView.
Recent public releases of Light Detection and Ranging (LiDAR) data in south central British Columbia (BC), Canada have revealed several landforms resembling ‘murtoos’, previously identified across portions of Scandinavia. In this study, we investigate the morphology and sedimentology of these landforms, the first report of their kind associated with ...
Alexander D. Sodeman, Tracy A. Brennand
wiley   +1 more source