Results 61 to 70 of about 401,804 (204)

Ice-stream response to ocean tides and the form of the basal sliding law [PDF]

The Cryosphere, 2011
The response of ice streams to ocean tides is investigated. Numerical modelling experiments are conducted using a two-dimensional flow-line model of coupled ice-stream and ice-shelf flow.
G. H. Gudmundsson
doaj   +1 more source

Clouds in the atmospheres of extrasolar planets. IV. On the scattering greenhouse effect of CO2 ice particles: Numerical radiative transfer studies

, 2013
Owing to their wavelengths dependent absorption and scattering properties, clouds have a strong impact on the climate of planetary atmospheres. Especially, the potential greenhouse effect of CO2 ice clouds in the atmospheres of terrestrial extrasolar ...
Kitzmann, D., Patzer, A. B. C., Rauer, H.   +2 more
core   +1 more source

Persistence and variability of ice-stream grounding lines on retrograde bed slopes [PDF]

The Cryosphere, 2016
In many ice streams, basal resistance varies in space and time due to the dynamically evolving properties of subglacial till. These variations can cause internally generated oscillations in ice-stream flow.
A. A. Robel, C. Schoof, E. Tziperman
doaj   +1 more source

Softening of Temperate Ice by Interstitial Water

Frontiers in Earth Science, 2021
Ice at depth in ice-stream shear margins is thought to commonly be temperate, with interstitial meltwater that softens ice. Models that include this softening extrapolate results of a single experimental study in which ice effective viscosity decreased ...
Conner J. C. Adams, Neal R. Iverson, Christian Helanow, Lucas K. Zoet, Charlotte E. Bate   +4 more
doaj   +1 more source

Surface undulations of Antarctic ice streams tightly controlled by bedrock topography [PDF]

The Cryosphere, 2013
Full Stokes flow-line models predict that fast-flowing ice streams transmit information about their bedrock topography most efficiently to the surface for basal undulations with length scales between 1 and 20 times the mean ice thickness.
J. De Rydt, G. H. Gudmundsson, H. F. J. Corr, P. Christoffersen   +3 more
doaj   +1 more source

The effect of human activities on moisture content of soils and underlying permafrost from the McMurdo Sound region, Antarctica [PDF]

, 1994
Soils and the underlying permafrost from undisturbed sites and sites that had been disturbed by construction activities at Marble Point and Pram Point in the McMurdo Sound region were sampled from excavated pits and drill cores. Gravimetric moisture (ice)
Balks, Megan R., Campbell, Iain B., Claridge, G.G.C.   +2 more
core   +2 more sources

Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data

Geophysical Research Letters, 2008
Spatially coincident radar and seismic data collected two weeks apart on Rutford Ice Stream were analyzed to investigate the mechanical and hydrological characteristics of the ice‐bed interface.
T. Murray, H. Corr, A. Forieri, A. M. Smith   +3 more
doaj   +1 more source

Multi-decadal evolution of Crary Ice Rise region, West Antarctica, amid modern ice-stream deceleration

Journal of Glaciology
The ongoing deceleration of Whillans Ice Stream, West Antarctica, provides an opportunity to investigate the co-evolution of ice-shelf pinning points and ice-stream flux variability.
Hannah Verboncoeur, Matthew Ross Siegfried, Nicholas Holschuh, Jeremy Paul Winberry, Duncan Byrne, Wilson Sauthoff, Tyler Clark Sutterley, Brooke Medley   +7 more
doaj   +1 more source

Basal topographic controls on the stability of the West Antarctic ice sheet: lessons from Foundation Ice Stream

Annals of Glaciology, 2017
Using observations of basal topography, ice thickness and modern accumulation rates, we use theory and a dynamic flowline model to examine the sensitivity of Antarctica's Foundation Ice Stream to changes in sea level, accumulation and buttressing at the ...
Kathleen Huybers, Gerard Roe, Howard Conway   +2 more
doaj   +1 more source

Modeling ice stream flow [PDF]

Eos, Transactions American Geophysical Union, 2011
Ice flow speed within an ice sheet can vary from a few meters to thousands of meters per year. Fast flowing ice streams can affect sea level, and their flow variation is one factor that determines whether an ice sheet is gaining or losing mass. But different ice streams exhibit different behaviors, and these spatial and temporal variations are not well
openaire   +1 more source