Results 31 to 40 of about 713 (170)

Active subglacial lakes and channelized water flow beneath the Kamb Ice Stream [PDF]

open access: yesThe Cryosphere, 2016
We identify two previously unknown subglacial lakes beneath the stagnated trunk of the Kamb Ice Stream (KIS). Rapid fill-drain hydrologic events over several months are inferred from surface height changes measured by CryoSat-2 altimetry and indicate ...
B.-H. Kim   +4 more
doaj   +1 more source

DYNAMICS OF ICE SHEET SURFACE OVER SUBGLACIAL LAKES IN ANTARCTICA

open access: yesЛëд и снег, 2015
Progress in understanding cascades of subglacial lakes inAntarcticaand surface dynamics was derived using satellite laser altimetry measurements ICESat. The morphological and dynamical pattern troughs and swells indicate subglacial lakes and positions of
V. M. Kotlyakov   +4 more
doaj   +1 more source

Geology and environments of subglacial Lake Vostok [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2016
The reconstruction of the geological (tectonic) structure and environments of subglacial Lake Vostok is based on geophysical surveys and the study of mineral particles found in cores of accreted ice and frozen lake water (sampled after the lake was unsealed).
German L, Leitchenkov   +3 more
openaire   +2 more sources

Exploring subglacial Antarctic lake environments [PDF]

open access: yesEos, Transactions American Geophysical Union, 2005
While subglacial lakes have been suspected, and speculated about, for more than 50 years, recent analyses of historical and new data have shown that liquid water environments are common beneath the vast Antarctic Ice Sheet. Airborne radar surveys have now documented more than 145 subglacial lakes, the largest being Lake Vostok located 4 km beneath the ...
Priscu, J. C.   +9 more
openaire   +4 more sources

Physiological Ecology of Microorganisms in Subglacial Lake Whillans [PDF]

open access: yesFrontiers in Microbiology, 2016
Subglacial microbial habitats are widespread in glaciated regions of our planet. Some of these environments have been isolated from the atmosphere and from sunlight for many thousands of years. Consequently, ecosystem processes must rely on energy gained from the oxidation of inorganic substrates or detrital organic matter.
Trista J Vick-Majors   +13 more
openaire   +3 more sources

Active subglacial lakes in the Canadian Arctic identified by multi-annual ice elevation changes [PDF]

open access: yesThe Cryosphere
Subglacial lakes influence glacier hydrology, dynamics, and mass balance; however, they are poorly documented outside the polar ice sheets. Here we use high-resolution digital elevation models during 2011–2021 and regression analysis to characterize ...
W. Zheng   +4 more
doaj   +1 more source

Antarctic subglacial lakes drain through sediment-floored canals: theory and model testing on real and idealized domains [PDF]

open access: yesThe Cryosphere, 2017
Over the past decade, satellite observations of ice surface height have revealed that active subglacial lake systems are widespread under the Antarctic Ice Sheet, including the ice streams. For some of these systems, additional observations of ice-stream
S. P. Carter   +2 more
doaj   +1 more source

Hydrodynamics and hydrogeochemistry of Werenskiold Glacier forefield, SW Spitsbergen [PDF]

open access: yesPolish Polar Research, 2023
In the 2008 ablation season, subglacial springs discharge, flow rate and profiling of the proglacial river, physical-chemical parameters (pH, temperature, electrical conductivity) and chemical composition (HCO3−, SO42−, Cl−, NO3−, NO2−, PO43−, Ca2+, Mg2+,
Magdalena Modelska, Sebastian Buczyński
doaj   +1 more source

Brief communication: Subglacial lake drainage beneath Isunguata Sermia, West Greenland: geomorphic and ice dynamic effects [PDF]

open access: yesThe Cryosphere, 2019
We report three active subglacial lakes within 2 km of the lateral margin of Isunguata Sermia, West Greenland, identified by differencing time-stamped ArcticDEM strips.
S. J. Livingstone   +5 more
doaj   +1 more source

Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica [PDF]

open access: yesThe Cryosphere, 2020
In the 2016–2017 austral summer, the University of Texas Institute for Geophysics (UTIG) and the Korea Polar Research Institute (KOPRI) collaborated to perform a helicopter-based radar and laser altimeter survey of lower David Glacier with the goals of ...
L. E. Lindzey   +13 more
doaj   +1 more source

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