Sentences with phrase «for ice deposits»

The temperatures inside the shadowed craters are just right for ice deposits blanketed by regolith darkened by organic compounds, explained David Paige of the University of California, Los Angeles.

Not exact matches

Circling the poles, the LRO will profile mineral abundances, scout potential landing sites, and look for water - ice deposits, imaging the terrain to a resolution of three feet.

Impacts exposing subsurface ice deposits and generating hydrothermal activity are one possible explanation for the bright spots and Herschel's water vapor; «cryovolcanoes» that erupt volatiles such as water rather than rock are another.

These signals allowed the researchers to peek under the planet's rusty sands for hidden deposits of ice.

«The conditions on Ceres are right for accumulating deposits of water ice,» said Norbert Schorghofer, a Dawn guest investigator at the University of Hawaii at Manoa.

Such a deposit of ice needles is not usually considered «snow,» however; in the Arctic, for instance, we might refer instead to an ice fog.»

Over the weekend, Phoenix scooped up a shovel - full of ruddy dirt using its 7.7 - foot (2.4 - meter) robotic arm to deposit into its Thermal and Evolved - Gas Analyzer, a suite of tiny, single - use ovens for baking soil and ice samples to study their chemistry.

«At Kima'Kho, we were able to map a passage zone in pyroclastic deposits left by the earliest explosive phase of eruption, allowing for more accurate forensic recovery of paleo - lake levels through time and better estimates of paleo - ice thicknesses,» says UBC volcanologist James K Russell, lead author on the paper published this week in Nature Communications.

The paleoclimate data, which included mainly changes in the oxygen isotopes of the calcium carbonate deposits, were then compared to similar records from other caves, ice cores, and sediment records as well as model predictions for water availability in the Middle East and west central Asia today and into the future.

But an existing ice deposit might also be an exploitable water source for future human exploration.»

«Based on the likely location of ice deposits during this period of Mars» history, and the amount of meltwater that could have been produced by Lyot ejecta landing on an ice sheet, we think this is the most plausible scenario for the formation of these valleys» said David Weiss, a recent Ph.D. graduate from Brown and the study's lead author.

In addition to water, organic molecules, which could have been deposited on the surface by crashing comets, somehow would have to get through the thick shells of ice for life to form, a situation that puts Saturn's geyser - spewing moon Enceladus at the top of Nimmo's list of potential spots for life.

Mars Express» antenna booms form the probe's Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument, a ground - penetrating radar designed to peer beneath the red planet's surface and scan for deposits of water or ice.

Dr. Jerison studies systems governed by simple rules that nonetheless exhibit complex behaviors, such as phase transitions — for instance, when a slight temperature increase causes ice to melt into liquid water; and threshold phenomena — for instance, when a small extra deposit of soil causes a stable slope to topple over into a landslide.

«The assumption has been that surface ice on Mercury exists predominantly in large craters, but we show evidence for these smaller - scale deposits as well,» said Ariel Deutsch, the study's lead author and a Ph.D. candidate at Brown.

That calibration enabled the researchers to detect high reflectance deposits consistent with surface ice in three large craters for which only off - nadir detections were available.

Diatoms in South Pole ice: Implications for eolian contamination of Sirius Group deposits.

Because of this, ice deposits in the polar regions are likely to be diminished in the summer period, while the build - up of ice in Tombaugh Regio may have endured for millions of years.

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You also are clearly ignorant of the evidence for Neoproterozoic and Paleoproterozic «Snowball Earth» episodes, which not only involve near - global ice cover, but also would be followed by extremely hot postglacial climates with temperatures of 40 - 50C — not yet observed, but not yet ruled out by any geological deposits by any means.

There are continuing major questions about the future of the great ice sheets of Greenland and West Antarctica; the thawing of vast deposits of frozen methane; changes in the circulation patterns of the North Atlantic; the potential for runaway warming; and the impacts of ocean carbonization and acidification.

Interesting comparison to the period when Agassiz (sp) is Switzerland proposed evidence for ice ages vs Biblical discussions of moraines and erratic boulders being deposited by floods.

They live only in a few borderline places, however; for global temperatures scientists use not only other species of trees but a wide variety of «proxies» from ice cores, coral reefs, cave deposits, the sea floor, pollen in lake sediments, boreholes in rock and so forth.

Another is that same changes, as well as melting of ice in the Arctic, will provide for much easier access to extremely rich natural resource deposits which are currently very hard (and in many cases economically unfeasible) to develop.

Has anyone taken recently deposited firn, mechanically compressed it to form ice, aged it for a while, then analyzed the ice using the present ice core analysis techniques to see if the results agree with the present atmosphere?

Higher levels of sea salts favor reduction processes and thus GEM destruction in the snow interstitial air (30), but no long - term trends have been reported for sea salt impurities deposited on the Greenland ice sheet during the last century (33).

RealClimate is wonderful, and an excellent source of reliable information.As I've said before, methane is an extremely dangerous component to global warming.Comment # 20 is correct.There is a sharp melting point to frozen methane.A huge increase in the release of methane could happen within the next 50 years.At what point in the Earth's temperature rise and the rise of co2 would a huge methane melt occur?No one has answered that definitive issue.If I ask you all at what point would huge amounts of extra methane start melting, i.e at what temperature rise of the ocean near the Artic methane ice deposits would the methane melt, or at what point in the rise of co2 concentrations in the atmosphere would the methane melt, I believe that no one could currently tell me the actual answer as to where the sharp melting point exists.Of course, once that tipping point has been reached, and billions of tons of methane outgass from what had been locked stores of methane, locked away for an eternity, it is exactly the same as the burning of stored fossil fuels which have been stored for an eternity as well.And even though methane does not have as long a life as co2, while it is around in the air it can cause other tipping points, i.e. permafrost melting, to arrive much sooner.I will reiterate what I've said before on this and other sites.Methane is a hugely underreported, underestimated risk.How about RealClimate attempts to model exactly what would happen to other tipping points, such as the melting permafrost, if indeed a huge increase in the melting of the methal hydrate ice WERE to occur within the next 50 years.My amateur guess is that the huge, albeit temporary, increase in methane over even three or four decades might push other relevent tipping points to arrive much, much, sooner than they normally would, thereby vastly incresing negative feedback mechanisms.We KNOW that quick, huge, changes occured in the Earth's climate in the past.See other relevent posts in the past from Realclimate.Climate often does not change slowly, but undergoes huge, quick, changes periodically, due to negative feedbacks accumulating, and tipping the climate to a quick change.Why should the danger from huge potential methane releases be vievwed with any less trepidation?

The Mars Ice House has created an action plan for the deployment and construction sequence involving a Mars descent vehicle, a deployable membrane, and semi-autonomous robotic printers to gather and deposit subsurface water ice for the 3D printing of the houIce House has created an action plan for the deployment and construction sequence involving a Mars descent vehicle, a deployable membrane, and semi-autonomous robotic printers to gather and deposit subsurface water ice for the 3D printing of the houice for the 3D printing of the house.

Chunks of ice deposited by the neighbouring glacier swirl across the otherwise untouched lake and provide cabin colonists with an organic view of the water and craggy peaks beyond with just the mustard shelter for company.