Results 31 to 40 of about 145,942 (141)

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 (<1 day), which are forced by rapid variations in meltwater input to the subglacial drainage system from
Cowton, Thomas, Bartholomew, Ian, Nienow, Peter, Sole, A., Mair, Douglas, Mair, D., Sole, Andrew, King, Matt A., Cowton, T., Bartholomew, I., King, M.A., Nienow, P., Cowton, Thomas; id_orcid   +12 more
core   +1 more source

The organization of subglacial drainage during the demise of the Finnish Lake District Ice Lobe [PDF]

The Cryosphere
Unknown basal characteristics limit our ability to simulate the subglacial hydrology of rapidly melting contemporary ice sheets. Sediment-based landforms generated beneath Late Pleistocene ice sheets, together with detailed digital elevation models ...
A. J. Hepburn, A. J. Hepburn, C. F. Dow, A. Ojala, J. Mäkinen, E. Ahokangas, J. Hovikoski, J.-P. Palmu, K. Kajuutti   +8 more
doaj   +1 more source

Englacial and Subglacial Hydrology, Austre Okstindbreen, Norway [PDF]

Journal of Glaciology, 1979
Abstract The efficiency of drainage systems within the glacier Austre Okstindbreen apparently increases as the summer progresses. As the transient equilibrium line moves up-glacier and the main system extends headwards, several systems may join together.
W. H. Theakstone, N. Tvis Knudsen
openaire   +1 more source

Seasonal Acceleration of Petermann Glacier, Greenland, From Changes in Subglacial Hydrology

Geophysical Research Letters, 2023
Petermann Glacier is a major outlet glacier of northern Greenland that drains a marine‐based basin vulnerable to destabilization from enhanced oceanic and atmospheric forcings. Using satellite radar interferometry data from the Sentinel‐1a/b missions, we
Shivani Ehrenfeucht, Mathieu Morlighem, Eric Rignot, Christine F. Dow, Jeremie Mouginot   +4 more
doaj   +1 more source

Chemical and isotopic switching within the subglacial environment of a high Arctic glacier. [PDF]

, 2006
Natural environmental isotopes of nitrate, sulphate and inorganic carbon are discussed in conjunction with major ion chemistry of subglacial runoff from a High Arctic glacier, Midre Lovénbreen, Svalbard. The chemical composition of meltwaters is observed
Hodson, Andrew, Heaton, Tim, Wynn, Peter M., Heaton, Tim H. E.   +3 more
core   +4 more sources

Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland

Arctic, Antarctic, and Alpine Research, 2018
Ice thickness measurements near the margin of the Greenland Ice Sheet (GrIS) are relatively sparse, presenting issues for modeling ice-flow dynamics, ice-sheet change, and subglacial hydrology.
Neil Ross, Andrew J. Sole, Stephen J. Livingstone, Ádam Igneczi, Mathieu Morlighem   +4 more
doaj   +1 more source

Two-way coupling between ice flow and channelized subglacial drainage enhances modeled marine-ice-sheet retreat [PDF]

The Cryosphere
Ice-sheet models used to predict sea-level rise often neglect subglacial hydrology. However, theory and observations suggest that ice flow and subglacial water flow are bidirectionally coupled: ice geometry affects hydraulic potential, hydraulic ...
G. Lu, J. Kingslake
doaj   +1 more source

An ice-sheet scale comparison of eskers with modelled subglacial drainage routes [PDF]

, 2015
Eskers record the signature of channelised meltwater drainage during deglaciation providing vital information on the nature and evolution of subglacial drainage.
Stokes, C.R., C.D. Clark (630927), Storrar, RD, Clark, CD, Tarasov, L, Stokes, Chris R., Hillier, J.K., Clark, C.D., Livingstone, SJ, Clark, Chris D., C.R. Stokes (630946), Tarasov, L., Livingstone, S.J., Stephen J. Livingstone (3691018), Tarasov, Lev, Livingstone, Stephen J., John Hillier (1254873), Storrar, Robert D., R. Storrar (630947), Hillier, JK, Hillier, John K., L. Tarasov (7191965), Storrar, R.D., Stokes, CR   +23 more
core   +1 more source

Sedimentary Signatures of Persistent Subglacial Meltwater Drainage From Thwaites Glacier, Antarctica

Frontiers in Earth Science, 2022
Subglacial meltwater drainage can enhance localized melting along grounding zones and beneath the ice shelves of marine-terminating glaciers. Efforts to constrain the evolution of subglacial hydrology and the resulting influence on ice stability in space
A. P. Lepp, L. M. Simkins, J. B. Anderson, R. W. Clark, J. S. Wellner, C-D. Hillenbrand, J. A. Smith, A. A. Lehrmann, R. Totten, R. D. Larter, K. A. Hogan, F. O. Nitsche, A. G. C. Graham, L. Wacker   +13 more
doaj   +1 more source

Products of an effusive subglacial rhyolite eruption: Blahnukur, Torfajokull, Iceland. [PDF]

, 2001
. We present field observations from Blahnukur, a small volume (400 m thick. Lithofacies associations attest to complex patterns of volcano-ice interaction.
Tuffen, H., Gilbert, J. S., McGarvie, D. W.   +2 more
core   +4 more sources