Sentences with phrase «of subglacial»

We conclude that the ice sheet surface is efficiently drained under optimal conditions, that digital elevation models alone can not fully describe supraglacial drainage and its connection to subglacial systems, and that predicting outflow from climate models alone, without recognition of subglacial processes, may overestimate true meltwater release from the ice sheet.

Geothermal activity can affect basal melt dynamics through increased lubrication and enhanced flow of subglacial streams.

Also the youngest organic materials ever found under the Greenland icecap are 450 — 800 000 years old and beryllium exposure ages of subglacial rocks are similar.

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

The first physical evidence of subglacial volcanism under the West Antarctic Ice Sheet Scientific Reports

Mankoff K. D., F. Straneo, C. Cenedese, S. B. Das, C. G. Richards, and H. Singh, 2016: Structure and dynamics of a subglacial plume in a Greenland fjord.

As long as people are bringing up the issue of subglacial volcanism there have been some papers purporting that rapid deglaciation can trigger volcanic eruptions.

This paper contributes to a better understanding of the transport pathways of subglacial sediments into this embayment at present and during the last glacial period.

But given the talent and accomplishment of RealClimate posters, and the breathtaking developments in climate science lately (the dynamics of subglacial lakes, for instance), sometimes it strikes me as a little sad that you have to devote so much energy to refuting the utter twaddle emitted by denialist nincompoops, time and time again.

This is the first time that one of these subglacial lakes has been sampled directly, he said.

Lake Whillans is one of hundreds of subglacial lakes that persist under Antarctica.

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.

The microbial life of subglacial ecosystems exists in total darkness and relies on relict carbon within subglacial sediments to persist.

The Subglacial Antarctic Lakes Scientific Access (SALSA) project is an integrative study of subglacial geobiology, water column and sedimentary organic carbon, and geological processes in Lake Mercer, one of the largest subglacial lakes in West Antarctica.

The Subglacial Antarctic Lakes Scientific Access (SALSA) project aims to uncover new knowledge about this newly explored biome through an integrative study of subglacial geobiology, water column and sedimentary organic carbon, and geobiological processes in one of the largest subglacial lakes in West Antarctica.

Tulaczyk, S., Kamb, B., Scherer, R.P., and Engelhardt, H.F., in press, Sedimentary processes at the base of a West Antarctic ice stream: constraints from textural and compositional properties of subglacial debris: Journal of Sedimentary Research.

Anandakrishnan, S., D.D. Blankenship, R.B. Alley and P.L. Stoffa, Influence of subglacial geology on the position of a West Antarctic ice stream from seismic observations.

Christianson, K., R.W. Jacobel, H. Horgan, S. Anandakrishnan and R.B. Alley, «The Dynamic Filling / Draining Cycle of Subglacial Lake Whillans», bibl.

Jacobel, R., K. Christianson, H. Horgan, S. Anandakrishnan, R. Alley, A. Muto, B. Petersen, R. Gobel, B. Keisling and L. Snyder, «Geophysical characteristics of Subglacial Lake Whillans and the ice stream grounding zone, West Antarctica», bibl.

Although there is a network of subglacial lakes underneath the Devon Ice Cap, two stood out due to a number of geologic reasons.

«If we're successful in all three [projects] next year, we'll have a much better understanding of the subglacial environment.»

82 Secret Lakes Lie Under Polar Ice Scientists have found evidence of subglacial lakes and rivers far under the surface of Antarctica...

In February — just three months after Britney Schmidt proposed the possibility of subglacial lakes within Europa's thick ice crust — Russian scientists announced that they had drilled through the ice to reach Vostok.

«They show clearly that... the surface melt must have contributed to the rapid rise, the refilling of the subglacial lake,» Joe MacGregor, a glaciologist from the University of Texas, who was not involved in the research, said.

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 first person to report evidence of a subglacial lake didn't recognize what he was seeing.

One thing that is known for sure about Antarctica's network of subglacial waterways is that they are not some insignificant sideshow to the grand drama of the continent's ice sheets.

«It takes ages to get programs together,» says Mahlon Kennicutt II, an oceanographer at Texas A&M University and secretary of the Subglacial Antarctic Lake Environments group (SALE).

As yet, no one has touched the waters of a subglacial lake with so much as a drill bit, but a Russian group that has been coring ice over Lake Vostok to get ancient climate records is coming close.

According to a recent National Research Council report, the discovery of subglacial lakes «opened an entirely new area of science in a short period of time.»

In 2012, the Russian Antarctic Expedition completed drilling through nearly 4 kilometers of ice to reach the surface of subglacial Lake Vostok.

The British are positioned to start drilling at Antarctica's Lake Ellsworth in autumn 2012, and an American team hopes to begin drilling to the Whillans Ice Stream, a network of subglacial waterways, in January 2013.

Scientists used the data to explore Antarctic ice thickness and the distribution of subglacial lakes.

She studies the mechanisms of ice sheet collapse, the origins of subglacial lakes, and their hidden ecosystems.

Lake Vostok is the best known and largest of the subglacial lakes, measuring roughly the size of Lake Ontario.

At a meeting last week, scientists from Russia, the United Kingdom and the United States described their plans to explore the planet's last uncharted ecosystems by drilling into three very different examples of these subglacial lakes.

Scherer (center) collects mud from the bottom of the subglacial lake for analysis.

It also overlays a network of subglacial lakes.

Not exact matches

Their analysis, recently published in Geology, reveals a subglacial lake covering as much as 1,250 square kilometers (making it the second - largest subglacial lake in Antarctica by length after Lake Vostok) and a series of canyons that extend a kilometer deep and 1,100 kilometers across.

Although the subglacial topography is vastly important, «it's unlikely we're ever going to [map] the whole of Antarctica in great detail using radar echo sounding — it's just too costly,» Fretwell says.

Now a team of geologists has scoured that area to reveal a massive subglacial lake and a series of canyons, one of which — more than twice as long as the Grand Canyon — could rank as Earth's largest.

When researcher Alberto Behar from NASA's Jet Propulsion Laboratory in Pasadena, Calif., joined an international Antarctic expedition last month on a trek to investigate Subglacial Lake Whillans, he brought with him a unique instrument designed and funded by NASA to help the researchers study one of the last unexplored aquatic environments on Earth.

The U.S. team is one of three international groups that sought to penetrate Antarctica's subglacial waters in the past month, seeking clues not only to glacial microbiology but also to ice sheet dynamics and the impact of climate change on the continent.

At the meeting, U.S. and British researchers described their longer - term plans for exploring subglacial lakes on the opposite side of the pole.

Today, the team announced that they have the first evidence of microbial life in subglacial Antarctic waters, shown here just as the team's underwater camera reached the bottom of the lake.

In its wake, the subglacial flash flood left a spectacular maze of channels, some hundreds of meters deep, incised into the stone, an intricate complex of meandering pathways called the Labyrinth.

Finally, she opens a door on the side of a rocky outcrop and enters the Svartisen Subglacial Laboratory, a research center buried under 650 feet of ice.

But, as the thickness of the ice over the volcano (between 100 and 400 meters) and the volume of lava are both unknown, it's also unclear whether an eruption will break through the ice, or whether it will remain subglacial.

On the heels of a Russian drilling effort that reached Lake Vostok, British and American teams also aim to penetrate ancient subglacial lakes

Though all subglacial lakes are good analogues for life beyond Earth, the hypersaline nature of the Devon lakes makes them particularly tantalizing analogues for ice - covered moons in our solar system.