Results 111 to 120 of about 5,522 (216)

Observing the subglacial hydrology network and its dynamics with a dense seismic array. [PDF]

Proc Natl Acad Sci U S A, 2021
Nanni U, Gimbert F, Roux P, Lecointre A.
europepmc   +1 more source

Subglacial lake drainage detected beneath the Greenland ice sheet [PDF]

, 2015
The contribution of the Greenland ice sheet to sea-level rise has accelerated in recent decades. Subglacial lake drainage events can induce an ice sheet dynamic response—a process that has been observed in Antarctica, but not yet in Greenland, where the ...
A Shepherd, A Shepherd, A Sole, AJ Tedstone, AV Sundal, BE Smith, BR Parizek, C Schoof, DJ Wingham, E Hanna, E Rignot, F Walter, HJ Zwally, I Joughin, I Sasgen, ID Bartholomew, IM Howat, IM Howat, JF Nye, K Steffen, LA Stearns, LC Smith, M McMillan, M Morlighem, M Siegfried, M Tedesco, MJ Hoffman, MR van den Broeke, OV Sergienko, RL Shreve, RM Goldstein, RSW van de Wal, S Palmer, SB Das, SH Mernild, SJ Palmer, T Flament, TL Mote, V Chu, W Abdalati   +39 more
core   +1 more source

Velocity of Greenland's Helheim Glacier Controlled Both by Terminus Effects and Subglacial Hydrology With Distinct Realms of Influence

Geophysical Research Letters
Two outstanding questions for the future of the Greenland Ice Sheet are (a) how enhanced meltwater draining beneath the ice will impact the behavior of large tidewater glaciers, and (b) to what extent tidewater glacier velocity is driven by changes at ...
A. N. Sommers, C. R. Meyer, K. Poinar, J. Mejia, M. Morlighem, H. Rajaram, K. L. P. Warburton, W. Chu   +7 more
doaj   +1 more source

Significant groundwater contribution to Antarctic ice streams hydrologic budget [PDF]

, 2014
Satellite observations have revealed active hydrologic systems beneath Antarctic ice streams, but sources and sinks of water within these systems are uncertain. Here we use numerical simulations of ice streams to estimate the generation, flux, and budget
Bougamont, M, Carter, SP, Christoffersen, P, Fricker, HA, Tulaczyk, S   +4 more
core   +1 more source

Mechanical forcing of water pressure in a hydraulically isolated reach beneath Western Greenland's ablation zone

Annals of Glaciology, 2016
A suite of surface and basal measurements during and after borehole drilling is used to perform in situ investigation of the local basal drainage system and pressure forcing in western Greenland. Drill and borehole water temperature were monitored during
Toby W. Meierbachtol, Joel T. Harper, Neil F. Humphrey, Patrick J. Wright   +3 more
doaj   +1 more source

High-resolution modelling of the seasonal evolution of surface water storage on the Greenland Ice Sheet [PDF]

, 2014
Seasonal meltwater lakes on the Greenland Ice Sheet form when surface runoff is temporarily trapped in surface topographic depressions. The development of such lakes affects both the surface energy balance and dynamics of the ice sheet.
Arnold, NS, Banwell, A, Willis, IC
core   +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

Multi-scale variations of subglacial hydro-mechanical conditions at Kongsvegen glacier, Svalbard [PDF]

The Cryosphere
The flow of glaciers is largely controlled by changes at the ice–bed interface, where basal slip and sediment deformation drive basal glacier motion. Determining subglacial conditions and their responses to hydraulic forcing remains challenging due to ...
C. Bouchayer, C. Bouchayer, U. Nanni, P.-M. Lefeuvre, J. Hult, L. Steffensen Schmidt, J. Kohler, F. Renard, F. Renard, T. V. Schuler   +9 more
doaj   +1 more source

Subglacial soft bed hydrology and climate change

Abstract Water at the glacier base controls the ‘slipperiness’ of the bed and the rate of glacier contribution to sea level rise, yet very little is known about this process associated with soft bedded glaciers. There is a continuum between distributed and channelized systems, associated with soft bedded glaciers, which have a distinct ...
Jane Hart, Nathaniel Baurley, Amelia Andrews, Benjamin Robson, Kirk Martinez   +4 more
openaire   +1 more source

Subglacial Processes and Subglacial Hydrology

, 2016
The hydrology of glaciers is known to have a significant influence on glacier dynamics. Rapid variations in dynamics can occur due to changes in the glacial and subglacial hydrology. However, our understanding of the subglacial drainage system is based on few direct and usually short-term observations.
openaire   +1 more source