Sentences with phrase «ice deformation in»
These glaciers typically move via basal sliding or subglacial deformation under wet (warm)- based ice in the accumulation area, but only by internal ice deformation in the colder parts.
http://www.antarcticglaciers.org/ Not exact matches
Ice deformation data from NASA's ICEsat, which indicates subglacial water movement, suggest that the lake has completely filled and drained twice since data - taking began in 2003.
That range of adaptability we hope will lead to new insights about ice deformation, in particular by combining analysis of different responses and seeing how they compete at different timescales,» said Christine McCarthy, the study's lead author.
«We found that the Antarctic ice sheet had an uneven effect on the global sea level because its growth resulted in a complex interplay between gravitational and rotational effects and the deformations to Earth's crust caused by ice advance and retreat,» he says.
The work suggests that most of the heat actually comes from defects that form in the ice's crystalline lattice as a result of deformation.
The ice streams in Antarctica will be flowing rapidly due to basal sliding — so it is incorrect to say that all glaciers are flowing by internal deformation only.
Debris entrainment and transportation is controlled by the structure of the glacier, and deformation of permafrost may be important in the formation of push - and ice - cored moraines.
The latter is almost linearly related to changes in ice sheet volume; the former, however, is influenced by a range of factors, including atmosphere / ocean dynamics and changes in Earth's gravitational field, rotation, and crustal and the mantle deformation associated with the redistribution of mass between land ice and the ocean.
-- Two complete environments (Alaska, New Cairo) and a WIP one (Abruzzo)-- Complete new camera system with position and intention prediction — New Engine SplineComponent with full deformation control and normalisation — New SSS Shader for the ice in Alaska — Jump System and Fly Mode — New track elements, nice and shiny — Polishing on the tracks to enhance the sense of speed and progression — New eyecandy effects (camera, light shaft, fov adaptation, etc...)
Regional variations arise because the Earth's gravity field is affected in multiple ways by the melt of ice, due to the direct effect of surface mass changes (the gravity field is determined by the distribution of mass), the consequent deformation of the Solid Earth (removing a load causes the Earth's surface to rebound, which in turn changes the distribution of the Earth's mass), the consequent redistribution of ocean water (the ocean surface is shaped by the gravity filed) and perturbations of the Earth's rotation axis (because of mass redistribution).
The current flow speeds at the terminus are too fast to be caused solely by internal deformation of the ice, implying that an increase in basal sliding forced by additional meltwater production is the probable cause of the velocity increases.
The sea ice component represents sea ice in multiple categories of thickness and accounts for changes in thickness due to growth and melt as well as mechanical deformation of ice (Thorndike et al. 1975, Hibler 1980).
And may I add looks remarkably similar to the idealized deformation of the polar vortex under scenarios with Arctic warming, low Arctic sea ice and increased Siberian snow cover presented in my recent review paper with Jennifer Francis [of Rutgers University].
So, as the leading edge melts, this deformation and filling would be first observed as a thinning of the sheet and, in particular, the trunk or main ice stream channel, as well as an acceleration of the stream.
Most of the deformation in an ice stream is in the bottom portion and thus most of the thickness of the ice stream is just carried along.
Furthermore, dissimilarity and a continued loss in coherence in sea ice drift patterns in March 2012 relative to March 2007 and 2011 suggests that spatiotemporal variability in fall ice extent will be governed by local ice conditions and ice - ice interactions as monitored by small - scale properties associated with sea ice deformation.
To assess these implications, we translate global into local SLR projections using a model of spatial variation in sea - level contributions caused by isostatic deformation and changes in gravity as the Greenland and Antarctic ice sheets lose mass (36 ⇓ — 38), represented as two global 0.5 ° matrices of scalar adjustment factors to the ice sheets» respective median global contributions to SLR and (squared) to their variances.
Sentinel - 1A / B operate a synthetic aperture radar (SAR) with advanced observation capabilities in all weather conditions over the ocean (wind, waves, and surface current) and sea ice field (sea ice deformation, lead fraction and sea ice drift).
The Arctic Oscillation and North Atlantic Oscillation influence substantially the drift and deformation of the sea ice, which is of equal importance in the seasonal evolution of sea ice ice extent.
Surface weather patterns are central in driving export, deformation, and compaction of ice, transporting heat and moisture, and are linked to cloud cover.
Surface weather patterns are central in driving export, deformation, and compaction of ice, and transporting heat and moisture, and are linked to cloud cover.
Advancing the knowledge on the effects of sea ice deformations on upper ocean stratification and ecosystem will have profound implications on our ability to forecast ongoing changes in Arctic Ocean.
Sea ice deformations also impact melting and freezing in leads, ridging and sea ice circulation, which are key players in determining sea ice mass balance and age, and freshwater mass distribution in the Arctic Ocean.
Hibler, W. D. III, A. Roberts, P. Heil, A. Y. Proshutinsky, H. L. Simmons, and J. Lovick, 2006, Modeling M2 tidal variability in Arctic sea - ice drift and deformation, Annals of Glaciology, 44, 418 - 428.
b) volumetric effects — change in the volume of water contained in the oceans and the geometry and areal extent of the ocean basins c) gravitational effects — change in the gravitational attraction of the earth (induced by deformation), by the change in distribution of ice and by the change in self - attraction of the water d) rotational effects — change in the moment of inertia caused by a change in the distribution of mass within the earth and on its surface.
A combined lack of coherence in ice drift fields and reduced ice concentrations in April 2011 relative to April 2007 suggest that springtime ice dynamical contributions to fall sea ice extent may be associated with sea ice deformation and ridging within an increasingly mobile and fractured ice cover.
However, deformation of a very fractured ice cover in response to regional wind - forcing may also play a role.