Sentences with phrase «in subglacial»

Sole, A. J., D. W. F. Mair, P. W. Nienow, I. D. Bartholomew, M. A. King, M. J. Burke, and I. Joughin (2011), Seasonal speedup of a Greenland marine - terminating outlet glacier forced by surface melt - induced changes in subglacial hydrology, Journal Of Geophysical Research - Earth Surface, 116, 2011.

Firstly, water can be ponded in subglacial lakes.

«The fact that the concentration and diversity of life detected in this subglacial lake exists means there is a very good sign for the existence of life on Europa, even if the details are different,» says Cynthia Phillips, a planetary geologist at the SETI Institute in California.

A new mechanism for emplacement and concentration of diatoms in subglacial deposits.

Based on accumulating measurements of microbes in the subglacial environment, he calculates that the concentration of cell and organic carbon in the Earth's ice sheets, or «cryosphere», may be hundreds of times higher than what is found in all the planet's freshwater systems.

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.

The ecosystem may be nourished at least in part by microbes that feed on organic goo in the subglacial mud — the remains of ancient plankton that died and sank to the bottom millions of years ago, when the world was warmer and this place was a sunlit sea.

Nestled in a steep fjord beneath three kilometers of Antarctic ice, the lost world of Lake Ellsworth has haunted Martin Siegert's dreams ever since he got involved in subglacial research a dozen years ago.

Those cells were the first ever found unambiguously in a subglacial lake.

Shifts in subglacial drainage patterns change the location of these basal channels, which could impact the ice shelf's stability by unevenly distributing the melting at the base.

«Ecosystem» because, just in the last week, the first ever instance of life in a subglacial lake has been spotted.

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.

Not exact matches

Mud and sediment from Subglacial Lake Whillans makes its first supraglacial appearance in January 2013.

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.

The results, and other subglacial analyses, will better equip geologists in understanding how the ice sheet responds to climatic changes.

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.

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.

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.

Subglacial ecosystems on the frozen continent clue us in to what life may be like in the outer solar system.

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.

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.

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

«Scientists discover first super salty subglacial lakes in Canadian Arctic: Super salty water beneath ice could serve as a terrestrial analogue for a habitat for life on other planets.»

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.

The Labyrinth: One of the most spectacular scenes in Antarctica, the Labyrinth was formed by a subglacial flood some 12 million years ago.

«Although the Devon hypersaline subglacial lakes are very unique discoveries, we may find networks of brine - rich subglacial water systems elsewhere in the Canadian Arctic.»

As many surface melt - water lakes form each summer around the Greenland ice sheet, the possibility exists that similar subglacial lakes may be found elsewhere in Greenland.

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.»

When Duncan J. Wingham and his colleagues from University College London reviewed archived satellite records, they noticed that over a period of 16 months, the surface above an unnamed subglacial lake in the center of the East Antarctic ice sheet was sinking.

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.

«Recent extension in the Bentley Subglacial Trench might explain these readings,» Wiens said.

In Lukin's opinion that's because Americans realize they can not be first to reach a subglacial lake, and, he says, «they don't like to be second, in any activity.&raquIn Lukin's opinion that's because Americans realize they can not be first to reach a subglacial lake, and, he says, «they don't like to be second, in any activity.&raquin any activity.»

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.

Graduate student Grace Barcheck, from the University of California in Santa Cruz, buries a seismic sensor in the ice sheet above Subglacial Lake Whillans.

In the late 1960s and throughout the 1970s, Hercules aircraft with downward - looking radars flew thousands of miles of survey lines across the continent to map the subglacial landscape.

Almost 380 subglacial lakes have been discovered and mapped in Antarctica, and have been explored remotely with ice - penetrating radar, gravity measurements and seismic investigations (A. Wright and M. Siegert Antarctic Science http://doi.org/jsn; 2012).

This information would help Tulaczyk understand whether subglacial water lubricates the flow of ice, and whether it might play a role in the runaway acceleration of glaciers that has occurred in some parts of Antarctica.

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.

«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.»

«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.

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.

In April a group led by climate physicist Duncan Wingham of University College London announced the discovery of more subglacial lakes.

If they can obtain the satellite, Polar Broadband Systems hopes to have it in place by the next Antarctic summer — in time for Russian scientists» return to Lake Vostok to collect the first sample of water from an Antarctic subglacial lake.

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

Pearce is part of a team of British scientists that hopes to retrieve samples next year from another subglacial lake, Lake Ellsworth in West Antarctica.

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.

Priscu is looking forward to a similar U.S. effort called the Whillans Ice Stream Subglacial Access Research Drilling project next year, which will use a similar approach of melting a hole with hot water in order to reach the river - fed Whillans Ice Stream in West Antarctica.

Though there are about 400 subglacial lakes in the world, mainly in Antarctica and Greenland, these are the first in the Canadian Arctic — and the first hypersaline subglacial lakes to be discovered anywhere in the world.

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.