Sentences with phrase «ice increases permafrost»

Sea Ice in its «Death Spiral» Scientist Claims Melting Arctic Ice Increases Permafrost Thaw Farther Inland Than Previously Thought Permafrost Holds Twice as Much GHGs as Previously Thought: Over 1500 Billion Tons of CO2 and Methane

So Close: Arctic Sea Ice Summer Melt Fails to Set Record in 2008 Melting Arctic Ice Increases Permafrost Thaw Farther Inland Than Previously Thought

More on Global Climate Change: The Clearest 5 Minute Lesson on Arctic Ice Melt You'll Get Increased Arctic Shipping means Even More Warming & Less Ice Melting Arctic Ice Increases Permafrost Farther Inland Than Previously Thought NASA Satellite Data Reveals Arctic Melting Season Now Nearly a Month Longer

More: National Snow and Ice Data Center Arctic Sea Ice Melting Arctic Sea Ice Melt 20 Years Ahead of Schedule - Scientist Maintains Tipping Point Assertion Melting Arctic Ice Increases Permafrost Melting Farther Inland Than Previously Thought Arctic Sea Ice Not Only Covers Less Area, It's Thinner Too: New Data Shows

Yesterday we got the news that melting arctic ice increases permafrost thawing up to 900 miles inland.

via:: BBC News and:: Reuters Climate Change 60 % More Greenhouse Gases Trapped in Permafrost Than Previously Thought Melting Arctic Ice Increases Permafrost Thaw Farther Inland Than Previously Thought Arctic Climate Tipping Point Happening Now!

Not exact matches

Substantial reductions in the extent of Arctic sea ice since 1978 (2.7 ± 0.6 percent per decade in the annual average, 7.4 ± 2.4 percent per decade for summer), increases in permafrost temperatures and reductions in glacial extent globally and in Greenland and Antarctic ice sheets have also been observed in recent decades.

«One societally relevant implication is that more storminess probably means more erosion of Arctic coastlines, especially in tandem with declines in buffering sea ice cover and increases in thawing coastal permafrost,» concluded Dr. Vavrus.

And finally, what about Mark's questions (# 3) and other factors not discussed here — do all these effects re Arctic ice lead scientists to believe there is a greater and / or earlier chance (assuming we continue increasing our GHG emissions — business as usual) of melting hydrates and permafrost releasing vast stores of methane into the atmosphere than scientists believed before the study, or is the assessment of this about the same, or scientists are not sure if this study indicates a greater / lesser / same chance of this?

Positive energy content change means an increase in stored energy (i.e., heat content in oceans, latent heat from reduced ice or sea ice volumes, heat content in the continents excluding latent heat from permafrost changes, and latent and sensible heat and potential and kinetic energy in the atmosphere).

Other indicators such as ocean acidification, increasing deep ocean heat, melting ice and permafrost, shrinking snow pack, and sea level rise further make the case that the additional carbon dioxide is affecting the global climate system.

The United Nations scientific community is pointing to the overwhelming evidence that global warming, from increased greenhouse gas emissions, is propelling us towards an irreversible runaway melting of the ice caps and northern permafrost while rising temperature cause massive forest fires.

These include increases in heavy downpours, rising temperature and sea level, rapidly retreating glaciers, thawing permafrost, lengthening growing seasons, lengthening ice - free seasons in the ocean and on lakes and rivers, earlier snowmelt, and alterations in river flows.

The increased temperatures have been accompanied with changes in snow, sea - ice, precipitation, permafrost, icebergs, landice, river runoff, polar lows, synoptic storms, cloudiness, avalanches, ocean circulation, and ocean acidification.

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.

Melting permafrost outgasses CO2 and methane, and the decrease in sea ice allows oceanic CO2 to mix back into the atmosphere; taken together, these processes greatly amplify the effect of increased sunlight, driving a relatively rapid exodus from the ice age.

The denialist cut - paste attempts to — via logical fallacy, hand - waving and dissembling — make it appear that... that... well, who knows but it isn't germane nor does it refute eroding coastlines due to less ice, nor does the denialist cut - paste refute the facts of melting permafrost, CH4 release, warmer Arctic temps, birds moving north into the Arctic, increased freshwater flow into the northern seas, and numerous other indicators.

Among these physical changes are increases in heavy downpours, rising temperature and sea level, rapidly retreating glaciers, thawing permafrost, lengthening growing seasons, lengthening ice - free seasons in the oceans and on lakes and rivers, earlier snowmelt and alterations in river flows.

This finding is consistent with the expected effect of increasing greenhouse gas concentrations and with other observed evidence of a changing climate such as reductions in Arctic sea ice extent, melting permafrost, rising sea levels, and increases in heavy downpours and heat waves.

(1) One is the ice sheet and glacier mechanical collapse, which doesn't require a whole lot more warming, but will happen with some set minimum amount of warming over some time period; and (2) the other is global warming that keeps increasing beyond the level needed to cause # 1, which among other things will perhaps lead to positive carbon feedbacks (e.g., from melting permafrost and hydrates).

Alaska's coast is vulnerable to the effects of sea - ice retreat, thawing of coastal permafrost, and rising sea level, all of which are caused by warming, and combine to increase coastal erosion.

Not only that, but the sea ice insulates the atmosphere from the ocean, and without it heat fluxes from the ocean to the atmosphere increase — all of which assists in the melting of the permafrost.

And finally, what about Mark's questions (# 3) and other factors not discussed here — do all these effects re Arctic ice lead scientists to believe there is a greater and / or earlier chance (assuming we continue increasing our GHG emissions — business as usual) of melting hydrates and permafrost releasing vast stores of methane into the atmosphere than scientists believed before the study, or is the assessment of this about the same, or scientists are not sure if this study indicates a greater / lesser / same chance of this?

Once the Arctic temperatures do increase, then the melting ice = increased albedo and melting permafrost = release of methane theories of tipping points is played.

Russian scientists are seeing dramatically increased levels of methane coming from melting permafrost in the East Siberian Ice Shelf.

This causes increased erosion due to permafrost melt, increased flooding due to the warmer temperatures, and intensified storms because the sea ice forms later in the season and is unable to provide a natural barrier for our coastal communities.

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Relatively rapid degradation of ice - rich permafrost is adversely affecting human infrastructure, altering Arctic ecosystem structure and function, changing the surface energy balance, and has the potential to dramatically impact Arctic hydrological process and increase greenhouse gas emissions.

Brysse et al. (2012) also found that the IPCC has tended to underestimate or failed to account for CO2 emissions, increased rainfall in already rainy areas, continental ice sheet melting, Arctic sea ice decline, and permafrost melting.

The bleaching of coral reefs around the world, increasing extreme weather events, the melting of large ice sheets and recent venting of methane from thawing permafrost make it abundantly clear that the earth is already too hot.

For the Tunguska increase, a potential impact with permafrost could provide the hydrogen, whereas the Laurentide Ice Sheet itself might be the hydrogen source for the Younger Dryas impact.

From historic droughts around the world and in places like California, Syria, Brazil and Iran to inexorably increasing glacial melt; from an expanding blight of fish killing and water poisoning algae blooms in lakes, rivers and oceans to a growing rash of global record rainfall events; and from record Arctic sea ice volume losses approaching 80 percent at the end of the summer of 2012 to a rapidly thawing permafrost zone explosively emitting an ever - increasing amount of methane and CO2, it's already a disastrous train - wreck.

1 Positive 1.1 Carbon cycle feedbacks 1.1.1 Arctic methane release 1.1.1.1 Methane release from melting permafrost peat bogs 1.1.1.2 Methane release from hydrates 1.1.2 Abrupt increases in atmospheric methane 1.1.3 Decomposition 1.1.4 Peat decomposition 1.1.5 Rainforest drying 1.1.6 Forest fires 1.1.7 Desertification 1.1.8 CO2 in the oceans 1.1.9 Modelling results 1.1.9.1 Implications for climate policy 1.2 Cloud feedback 1.3 Gas release 1.4 Ice - albedo feedback 1.5 Water vapor feedback 2 Negative 2.1 Carbon cycle 2.1.1 Le Chatelier's principle 2.1.2 Chemical weathering 2.1.3 Net Primary Productivity 2.2 Lapse rate 2.3 Blackbody radiation

Other factors for the observed 7 percent increase in runoff from 1936 to 1999 could be changes in ice and permafrost melt or changes in the seasonality of precipitation and runoff, he said.

The increasing loss of Arctic sea ice is threatening polar bears across their range; melting sea ice is affecting the Arctic climate in a feedback loop; and scientists expect melting permafrost will release more carbon dioxide and methane.

Related Rapid sea - ice loss may increase the rate of Arctic land warming by 3.5 times — affecting permafrost Is This the Compost Bomb's Smoking Gun?

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 observed effects of cryosphere reduction include modification of river regimes due to enhanced glacial melt, snowmelt advance and enhanced winter base flow; formation of thermokarst terrain and disappearance of surface lakes in thawing permafrost; decrease in potential travel days of vehicles over frozen roads in the Arctic; enhanced potential for glacier hazards and slope instability due to mechanical weakening driven by ice and permafrost melting; regional ocean freshening; sea - level rise due to glacier and ice sheet shrinkage; biotic colonisation and faunal changes in deglaciated terrain; changes in freshwater and marine ecosystems affected by lake - ice and sea - ice reduction; changes in livelihoods; reduced tourism activities related to skiing, ice climbing and scenic activities in cryospheric areas affected by degradation; and increased ease of ship transportation in the Arctic.

Ignoring the possible increase of «methane from permafrost» with warming for now, it appears that NSIDC data tell us a) that northern hemisphere snow cover has not shown any statistical change since the 1980s, b) that Arctic sea ice has shrunk since measurements started in 1979 and c) that Antarctic sea ice has grown gradually over this period.

Norwegian, Canadian, Russian, US and other polar scientists reported that, in the last four years, air temperatures have increased, sea ice has declined sharply, surface waters in the Arctic ocean have warmed and permafrost is in some areas rapidly thawing, releasing methane.

However, with the ice gone, the wave action on Arctic permafrost shores will increase.