Results 81 to 90 of about 1,037,031 (170)

Quantifying bed roughness beneath contemporary and palaeo-ice streams

Journal of Glaciology, 2018
Bed roughness is an important control on ice-stream location and dynamics. The majority of previous bed roughness studies have been based on data derived from radio-echo sounding (RES) transects across Antarctica and Greenland.
FRANCESCA A.M. FALCINI, DAVID M. RIPPIN, MAARTEN KRABBENDAM, KATHERINE A. SELBY   +3 more
doaj   +1 more source

Glacial Geomorphology of southern Alberta, Canada [PDF]

, 2009
During deglaciation from the Last Glacial Maximum three terrestrial ice streams within the south western sector of the Laurentide Ice Sheet competed and coalesced in southern Alberta; the High Plains Ice Stream (HPIS), Central Alberta Ice Stream (CAIS ...
YOUNG, NATHANIEL,JOSEPH,PETER
core  

A stratigraphic link across 1100 km of the Antarctic Ice Sheet between the Vostok ice-core site and Titan Dome (near South Pole) [PDF]

, 2000
Isochronous internal ice-sheet layering, measured from airborne 60 MHz radar, was traced between Lake Vostok and the Titan Ice Dome (100 km from South Pole Station), Antarctica. Three layers were selected between Ridge B and Titan Dome, and between Ridge
Siegert, MJ, Hodgkins, R, Siegert, M. J., Hodgkins, R.   +3 more
core   +1 more source

First description of subglacial megalineations from the late Paleozoic ice age in southern Africa.

PLoS ONE, 2019
We identify late Paleozoic ice age (LPIA) subglacial megalineations from field and geospatial imagery of the Twyfelfontein area of northern Namibia, and present the results of a geomorphometric analysis of those data.
Graham D Andrews, Andrew T McGrady, Sarah R Brown, Shannon M Maynard   +3 more
doaj   +1 more source

Accelerating ice flow at the onset of the Northeast Greenland Ice Stream. [PDF]

Nat Commun, 2022
Grinsted A, Hvidberg CS, Lilien DA, Rathmann NM, Karlsson NB, Gerber T, Kjær HA, Vallelonga P, Dahl-Jensen D.   +8 more
europepmc   +1 more source

Crevasse refreezing and signatures of retreat observed at Kamb Ice Stream grounding zone. [PDF]

Nat Geosci, 2023
Lawrence JD, Washam PM, Stevens C, Hulbe C, Horgan HJ, Dunbar G, Calkin T, Stewart C, Robinson N, Mullen AD, Meister MR, Hurwitz BC, Quartini E, Dichek DJG, Spears A, Schmidt BE.   +15 more
europepmc   +1 more source

Ice-shelf Response to Ice-stream Discharge Fluctuations: II. Ideal Rectangular Ice Shelf

, 1988
Abstract. Ice-shelf thickness and velocity anomalies resulting from ice-stream discharge fluctuations are calculated for an ideal ice shelf fed by a single ice stream and confined within a rectangular coastal geometry.
Manfred A. Lange, Douglas R. Macayeal
core   +2 more sources

Extensive inland thinning and speed-up of Northeast Greenland Ice Stream. [PDF]

Nature, 2022
Khan SA, Choi Y, Morlighem M, Rignot E, Helm V, Humbert A, Mouginot J, Millan R, Kjær KH, Bjørk AA.   +9 more
europepmc   +1 more source

Dynamics of the Northeast Greenland Ice Stream: the role of geothermal heat and subglacial hydrology [PDF]

, 2019
Ice streams are rivers of fast flowing ice, crucial for the mass balance of ice sheets. The Greenland Ice Sheet shows a complex flow pattern, where a few major ice streams drain most of the ice sheet, contributing to sea level rise.
Smith-Johnsen, Silje
core  

Basal conditions of the onset zone of the Northeast Greenland Ice Stream derived from airborne ultra-wideband radar data

, 2020
We assess the basal conditions of the onset region of the Northeast Greenland Ice Stream (NEGIS) in a systematic analysis of airborne ultra-wideband radar data.
Franke, Steven, Jansen, Daniela, Paden, John D, Beyer, Sebastian, Eisen, Olaf   +4 more
core   +1 more source