Sentences with word «subglacial»

The latest findings of microbial life flourishing in the extreme environment of subglacial Lake Whillans in Antarctica, which were detailed in the first part of this article, are further hinting at the possibility of life existing in a similar fashion as well in the mysterious, underground alien waters of Europa.

Firstly, water can be ponded in subglacial lakes.

Antarctic subglacial water: origin, evolution and ecology.

While direct samples of water from subglacial Antarctic lakes have yet to be obtained, the lower 80m or so of the Vostok ice core represents lake water that progressively freezes onto the base as the ice sheet slowly traverses the lake.

Doran had been invited to Big Sky to present a new National Academies of Science / National Research Council (NRC) report (pdf) setting standards for good environmental stewardship in the study of subglacial environments.

The peak drainage rate was about 8,500 cubic feet (240 cubic meters) per second, about half the flow of the Hudson River — the largest meltwater outflow yet reported for subglacial lakes in this region.

A decade after Russian and British researchers announced the discovery of Lake Vostok, an enormous body of water more than two miles beneath the permanent ice sheet of Antarctica, two independent teams of scientists have evidence of other large subglacial lakes and rivers, and perhaps an entire watershed.

The US$ 20 - million Whillans Ice Stream Subglacial Access Research Drilling (WISSARD) project, which Powell oversees, plans to drill into the lake during the 2012 - 13 field season.

«The Bentley Subglacial Trench, which is the lowest point on Earth not covered by an ocean, would still be a kilometer and a half below sea level if the ice were removed.»

The study, part of the National Science Foundation - funded Whillans Ice Stream Subglacial Access Research Drilling project (WISSARD), was supported by UC San Diego's John Dove Isaacs Chair in Natural Philosophy awarded to Fricker.

The most interesting finding, Lloyd said, is the discovery of a hot zone beneath the Bentley Subglacial Trench.

Read the original research: Melt - induced speed - up of Greenland ice sheet offset by efficient subglacial drainage Combine this was some research published in December, which showed that the Greenland Ice Sheet is more able to accommodate gradual warming than it can short - term extreme weather events.

People crowded in as the first water from Subglacial Lake Whillans was decanted into a clear tube.

Modeling changes in the observed harmonic frequencies indicates that the spectral characteristics of seismic data can provide important information about hydraulic fracture geometry and fluid pressure at depth, leading to important insights into subglacial hydrologic processes.

But dive below the West Antarctic Ice Sheet, and you'll find fire as well, in the form of subglacial volcanoes.

Photojournalist Keith Heyward uses a dolly to film above a formation in the Dry Valleys known as the Labyrinth, a series of deep troughs and ridges that researchers believe was carved out in a massive subglacial flood roughly 12 million years ago.

Last month, a U.S. team successfully used a hot - water drill — a technology designed to prevent contamination — to reach subglacial Lake Whillans.

Untersee is a good model for Mars, he says, because it is supplied by subglacial melt — water that accumulates at the bottom of an ice pile — rather than from surface melting, which does not occur on Mars.

«Applying the same technique to other subglacial volcanos will provide new constraints on paleoclimate models that consider the extents and timing of planetary glaciations.»

They are thought to be the first isolated hypersaline subglacial lakes in the world.

Crustal Structure beneath the Northern Transantarctic Mountains and Wilkes Subglacial Basin: Implications for Tectonic Origins.

Led by Pennsylvania State University and Washington University at St. Louis, GAMSEIS is deploying broadband seismometers to image the structure of the Gamburtsev Subglacial Mountains.

A 50 - year puzzle about how a mountain range, the Gamburtsev Subglacial Mountains, 3 km under the Antarctic ice, was created looks like it has been solved by a team of international scientists.

«Presently there are no signs of eruption, but it can not be excluded that the current activity will result in an explosive subglacial eruption, leading to an outburst flood and ash emission.»

Alley, R.B. Continuity comes first: Recent progress in understanding subglacial deformation.

Lough, A. C., Wiens, D. A., Barcheck, C. G., Anandakrishnan, S., Aster, R. C., Blankenship, D. D., Huerta, A. D., Nyblade, A., Young, D. A., and Wilson, T. J., 2013, Seismic Detection of an Active Subglacial Magmatic Complex in Marie Byrd Land, Antarctica, Nature Geoscience, 6, 1031 - 1035, doi: 10.1038 / ngeo1992.

It is driven by poorly understood processes occurring at the ice - ocean interface, such as subglacial discharge into the ocean, turbulent plume dynamics, submarine melting, and iceberg calving.

Clarke, T.S. & Echelmeyer, K. 1996: Seismic - reflection evidence for a deep subglacial trough beneath Jakobshavns Isbræ, West Greenland.

The presence of a specific type of rock, only present in large quantities quite far and deep within the Wilkes Subglacial Basin, indicated serious ice sheet retreat.

Anderson, J.B., Andrews, B.A., Bartek, L.R., and Truswell, E.M., 1991, Petrology and palynology of glacial sediments: implications for subglacial geology of the eastern Weddell Sea, Antarctica: in Thompson, M.R.A., Crame, J.A., and Thompson, J.W. (eds), Geological Evolution of Antarctica, Cambridge University Press, New York, p. 231 - 235.

The Wilkes Basin is inland, with subglacial troughs connecting the largest ice volume in the east.

Through examining microfossils and carbon isotopes within sediment cores, SALSA will gain new information on past paleoclimates, the source and age of relict carbon within subglacial lakes, and the geologic history of West Antarctica.

Through combining results across multiple disciplines, we will learn new information about our planet's past and gain knowledge on subglacial processes such as carbon cycling and water - ice dynamics.

Dramatic skies shadow an equally dramatic story in the valley below: a massive subglacial flood roughly 12 million years ago carved deep trenches in the bedrock, leaving behind a formation known as the Labyrinth.

«This underscores both the mountain range's remarkable age and the extraordinary degree of subglacial landscape preservation,» writes Darrel Swift in an accompanying article in Nature Geoscience.

Mackay walks on a ridge high above the Labyrinth, formed in a devastating subglacial flash flood 12 million years ago.

While there are more than 400 known subglacial lakes in the world, concentrated primarily in Antarctica with a few in Greenland, these are the first found in the Canadian Arctic.

Clarke, T.S. & Echelmeyer, K. 1996: Seismic - reflection evidence for a deep subglacial trough beneath Jakobshavns Isbræ, West Greenland.

The project provided seminal discoveries in subglacial hydrological and geological dynamics and also uncovered a diverse microbial ecosystem surviving without any light source thousands of feet below the ice.

Lythe, M., D.G. Vaughan, and B. Consortium, BEDMAP: a new ice thickness and subglacial topographic model of Antarctica, Journal of Geophysical Research, 106 (B6), 11335 - 11352, 2001.

Licht, K.J., Dumbar, N.W., Andrews, J.T. & Jennings, A.E. Distinguishing subglacial till and glacial marine diamictons in the western Ross Sea, Antarctica: Implications for a last glacial maximum grounding line.

The quakes seem to be related to increased subglacial melting, causing movement of large chunks of ice.

Runoff from steep ice - cliffs, or through subglacial flow driven by water percolating through pores or fractures, will convert a high fraction of melting into ablation.

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.

An unwrinkled ice sheet, for example, might reveal a buried subglacial lake whereas an undulating one might signal a hidden mountain range.