Sentences with phrase «by methane ice»

NASA has recently shared an image of what could be halo - like craters in the dwarf planet, which may be caused by methane ice presence in their walls and rims.

Not exact matches

The researchers determined from the isotope ratio that the Taylor Glacier samples were 120,000 years old, and validated the estimate by comparing the results to well - dated ice core measurements of atmospheric methane and oxygen from that same period.

Huygens came to rest in what looked to be a floodplain strewn with «stones» of water ice polished smooth by flows of liquid methane, and it touched down with a crunch that suggested its slushy landing site was covered in a frozen glaze — a bit like crème brûlée.

Methane hydrates have been known since the 1930s, when natural gas companies found that their pipelines were sometimes clogged by a kind of ice composed of water and mMethane hydrates have been known since the 1930s, when natural gas companies found that their pipelines were sometimes clogged by a kind of ice composed of water and methanemethane.

Scientists can determine ancient atmospheric concentrations by measuring CO2 and methane levels in tiny air bubbles trapped in such ice, formed when the ice fell to the earth as snow.

Consider this whimsical snippet from a 2007 Titan - themed poem by study co-author Mike Malaska, a scientist in the Planetary Ices Group at the NASA Jet Propulsion Laboratory: «Methane sky; ethane drizzle.Surface made of organic shizzle.Dunes of plastic; it's fantastic.Let's get stickyand electrostatic.»

However, many of the sources along the continental slope lie at cold depths in which ices have formed at high pressures within sea - floor sediments, which once trapped methane produced by microbes living there.

Its «rock» is water ice and its rains are hydrocarbons such as methane and ethane condensed by the cold.

Bright clouds are probably caused by gases such as methane rising in the atmosphere and condensing into highly reflective clouds of methane ice.

Might future exploding methane domes, triggered by melting ice, release extra methane into the atmosphere?

Methane hydrates are formed by bonding with water to make an ice - like substance in certain temperature / pressure conditions that can be found at shallow water depths in

Nor do we adequately understand the relative contributions of microbes (i.e., biogenic methanogenesis), fossil sources, and the dissociation of gas hydrates (an ice - like substance formed by methane and water under pressure).

Local artifacts in ice core methane records caused by layered bubble trapping and in situ production: a multi-site investigation, Climate of the Past, 12, p. 1061 - 1077.

«This is probably because water ice is hidden by volatile materials like methane, nitrogen and carbon monoxide.»

I think the runaway methane release suggested by some is not likely as long as there is plenty of ice on Greenland / EAIS as their melting will keep the ocean surfaces cool enough.

If I understand AMEGs argument correctly, it is that we need to find engineering solutions in the Arctic to alleviate an effective emergency (on a basis of precautionary principle at very least) posed by possible majority loss of sea ice or escalation in methane release.

Re «Estimates of the drivers of global temperature change in the ice ages show that the changes in greenhouse gases (CO2, methane and nitrous oxide) made up about a third of the effect, amplifying the ice sheet changes by about 50 % (Köhler et al, 2010).»

Reductions in sea ice and other changes may affect the amount of Carbon Dioxide absorbed by the Arctic Ocean, while thawing permafrost is expected to increase emissions of methane.

To get around this problem, Thomas Blunier and colleagues nearly ten years ago pioneered an ingenious method to synchronise the ice cores of Greenland and Antarctica by analysing changes in the amount of methane in air bubbles in the ice.

You refer to a methane explosion but close - up pictures of the pit clearly show polishing and erosion by ice.

It seems possible that those tens of thousands of circular depressions were generated by similar methane gas eruptions, followed by melting of ice and methane hydrate and subsidence to enlarge the initial gas eruption craters.

Major ice sheets, in particular in Greenland [8], ocean methane clathrate deposits [9], and future evolution of glacial / interglacial cycles [10] might be affected by that long tail.

An example is included in the materials presented by the so - called «Arctic Methane Emergency Group» [AMEG] who show extrapolations of PIOMAS data and warn about the potential of a seasonally ice - free Arctic ocean in just a few years.»

The accusation that AMEG does not «get the science» is a serious accusation, since AMEG claims to be driven to its conclusions by the best available evidence, both on sea ice and on methane.

For example: 1) plants giving off net CO2 in hot conditions (r / t aborbing)-- see: http://www.climateark.org/articles/reader.asp?linkid=46488 2) plants dying out due to heat & drought & wild fires enhanced by GW (reducing or cutting short their uptake of CO2 & releasing CO2 in the process) 3) ocean methane clathrates melting, giving off methane 4) permafrost melting & giving off methane & CO2 5) ice & snow melting, uncovering dark surfaces that absorb more heat 6) the warming slowing the thermohaline ocean conveyor & its up - churning of nutrients — reducing marine plant life & that carbon sink.

This has been reinforced with increasing urgency by scientists around the world, with US climate scientist James Hansen this week publishing a paper highlighting that «conceivable levels of human - made climate forcing could yield the low - end runaway greenhouse effect» including «out - of - control amplifying feedbacks such as ice sheet disintegration and melting of methane hydrates».

Ice loss is driven by emissions of long - lived gases like carbon dioxide and short - lived climate pollutants like methane and black carbon, or soot.

Now, Hubertus Fischer of the Alfred Wegener Institute for Polar and Marine Research in Bremerhaven, Germany, and colleagues have measured carbon isotope ratios in methane from the whole of the last glacial - interglacial transition (between 20,000 and 10,000 years before present) by analysing ice - cores.

Hubberten speculates that a thick layer of ice on top of the soil at the Yamal crater site trapped methane released by thawing permafrost.

«Our investigations show that uplift of the sea floor in this region, caused by the melting of the ice masses since the end of the last ice age, is probably the reason for the dissolution of methane hydrate.»

Sediment samples gathered in south Australia led Kennedy's team to theorize that a catastrophic era of global warming was triggered some 635 million years ago by a gradual — and then abrupt — release of methane from frozen soils, bringing an end to «Snowball Earth,» when the entire planet was encrusted in ice.

Even if the estimates of the ice sheet collapsing by the end of the century were correct, however, it would likely take much longer than that for the effect of methane hydrates to become detectable in the atmosphere, says Alexey Portnov, a researcher at the Arctic University of Tromsø in Norway.

«Previous observations have pointed to large methane plumes being released from the seabed in the relatively shallow sea off the northern coast of Siberia, but the latest findings were made far away from land in the deep, open ocean where the surface is usually capped by ice.»

Ice - core and biology studies confirm living ecosystems make climate feedback by way of methane, which could accelerate global warming.

This is an ice - like solid that consists of methane surrounded by water molecules in a lattice structure.

These predict that if the level of carbon dioxide, methane and so on in the atmosphere continues to rise, then the Arctic Ocean will be free of floating summer ice by the end of the century.

Greenland, Siberia, and Antarctica, should be noted as climate engineering concentration areas due to the grave ramifications posed by the melting ice and / or frozen methane deposits in these regions.

It is the famous clathrate gun: methane frozen on shallow sea beds, and exposed by retreating sea ice, thaws in such volume that it clouds into the atmosphere.

The IPCC underestimated the danger posed by the melting of the Greenland ice sheet and the release of methane from warmer wetlands, the report adds.

For earlier times, we adopt Greenland temperature estimated as follows (33): For the period 128,700 B.P. to 340,000 B.P., this temperature was derived from a proxy based on Antarctic ice core methane data using the relation T = − 51.5 + 0.0802 [CH4 (ppb)-RSB- from a linear regression of Greenland temperature estimates on Antarctic methane for the period 150 B.P. to 122,400 B.P.. For the remaining period of 122,400 B.P. to 128,700 B.P., data from a variety of climate archives indicate that Greenland warming lags that of Antarctica, with rapid warming commencing around 128.5 ky B.P. in the northern North Atlantic and reaching full interglacial levels by about 127 ky B.P. (51).

Interest in high - latitude methane and carbon cycles is motivated by the existence of very large stores of carbon (C), in potentially labile reservoirs of soil organic carbon in permafrost (frozen) soils and in methane - containing ices called methane hydrate or clathrate, especially offshore in ocean marginal sediments.

Mitigation plans proposed by governments would slow down the rate of carbon emissions but continuing emissions as well as feedbacks from ice melt, warming oceans, methane release and fires would continue to push temperatures upwards.

Worryingly, the International Siberian Shelf Study (ISSS - 08) found that methane is emerging from the East Siberian Arctic Shelf, as evidenced by bubble clouds of methane in the sea and methane bubbles trapped in sea ice in the winter.

The ice contains tiny air bubbles from the atmosphere in the snow that fell, and by analysing the composition of the air you can get a climate curve, which tells you about both the annual temperature and methane content.

The models heavily relied upon by the Intergovernmental Panel on Climate Change (IPCC) had not projected this multidecadal stasis in «global warming»; nor (until trained ex post facto) the fall in TS from 1940 - 1975; nor 50 years» cooling in Antarctica (Doran et al., 2002) and the Arctic (Soon, 2005); nor the absence of ocean warming since 2003 (Lyman et al., 2006; Gouretski & Koltermann, 2007); nor the onset, duration, or intensity of the Madden - Julian intraseasonal oscillation, the Quasi-Biennial Oscillation in the tropical stratosphere, El Nino / La Nina oscillations, the Atlantic Multidecadal Oscillation, or the Pacific Decadal Oscillation that has recently transited from its warming to its cooling phase (oceanic oscillations which, on their own, may account for all of the observed warmings and coolings over the past half - century: Tsoniset al., 2007); nor the magnitude nor duration of multi-century events such as the Mediaeval Warm Period or the Little Ice Age; nor the cessation since 2000 of the previously - observed growth in atmospheric methane concentration (IPCC, 2007); nor the active 2004 hurricane season; nor the inactive subsequent seasons; nor the UK flooding of 2007 (the Met Office had forecast a summer of prolonged droughts only six weeks previously); nor the solar Grand Maximum of the past 70 years, during which the Sun was more active, for longer, than at almost any similar period in the past 11,400 years (Hathaway, 2004; Solankiet al., 2005); nor the consequent surface «global warming» on Mars, Jupiter, Neptune's largest moon, and even distant Pluto; nor the eerily - continuing 2006 solar minimum; nor the consequent, precipitate decline of ~ 0.8 °C in TS from January 2007 to May 2008 that has canceled out almost all of the observed warming of the 20th century.

Ice - core and biology studies confirm living ecosystems give climate feedback by way of methane, which could accelerate global warming.

The methane produced by the burning of biomass, like wood, contains more of the heavier isotope (carbon - 13) relative to the lighter isotope (carbon - 12), than methane which is produced in wetlands,» explains Professor Thomas Blunier, Centre for Ice and Climate at the Niels Bohr Institute at the University of Copenhagen.The researchers have measured the isotopic composition of the methane in ice cores that are drilled up from the Greenland ice cap at the NEEM project in northwestern GreenlaIce and Climate at the Niels Bohr Institute at the University of Copenhagen.The researchers have measured the isotopic composition of the methane in ice cores that are drilled up from the Greenland ice cap at the NEEM project in northwestern Greenlaice cores that are drilled up from the Greenland ice cap at the NEEM project in northwestern Greenlaice cap at the NEEM project in northwestern Greenland.

Apparently the drop in methane was caused by a lack of farts from ice age megafauna...