Sentences with phrase «dangerous climate feedback»

This development also sets up dangerous climate feedback loops as reflective white snow and ice turn into heat - absorbing dark - blue water.

The peat that sits under the forests could also burn, creating another dangerous climate feedback loop.

Not exact matches

One problem is that dangerous levels of climate change are exacerbated by positive feedback loops — changes that release more greenhouse gases from nature due to warming driven by humans.

The theory of dangerous climate change is based not just on carbon dioxide warming but on positive and negative feedback effects from water vapor and phenomena such as clouds and airborne aerosols from coal burning.

Given the unprecedented rapidity of the human - made climate forcing, it is difficult to establish how soon slow feedbacks will become important, but clearly slow feedbacks should be considered in assessing the «dangerous» level of global warming, as discussed in the next section.

There is increasing evidence that some slow feedbacks can be triggered within decades, so they must be given major consideration in establishing the dangerous level of human - made climate interference.

Of course IF there was no Real Chance of (uncontrollable climate feedbacks that are may well be extremely dangerous — in time and place) then 3 years later in 2015 the UNFCCC Paris Treaty would NOT have moved to enshrine holding temps at UNDER 1.5 C.

Impacts such as SLR and heat waves and crop failures and beetles killing forests and all the other dangerous Impacts and Positive Climate Feedbacks and Tipping Points....

, then action will definitely be taken to avoid a crisis in positive climate feedbacks and the dangerous regional impacts that will undoubtedly follow.

It might be that serious authorities such as Hansen and the head of the UNFCCC secretariat are wrong to declare that goal of a 2.0 C ceiling of warming poses unacceptably dangerous climate destabilization, but it seems widely accepted that a peak of 450ppmv CO2 would allow a near - even chance of staying below 2.0 C and thereby avoiding the feedbacks taking off with catastrophic effects.

Nurse hasn't the foggiest idea about the key part of climate science, aerosols / water vapour interactions supposed to produce dangerous positive feedback.

Per the IPCC's global warming hypothesis, at the very top of the troposphere, above the equator region, is the location (12 km, 200hPa @ 20 ° N - 20 ° S) that triggers a positive climate feedback, which produces the mythical runaway, tipping point of accelerated, dangerous global warming, which of course is unequivocal and irrefutable, except when it isn't.

Given the unprecedented rapidity of the human - made climate forcing, it is difficult to establish how soon slow feedbacks will become important, but clearly slow feedbacks should be considered in assessing the «dangerous» level of global warming, as discussed in the next section.

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?

So, in the end, not an obvious disaster - movie plot, but a potential positive feedback that could turn out to be the difference between success and failure in avoiding «dangerous» anthropogenic climate change.

The 2 C is a number that has been characterized by all variants of dangerous by leading climate experts, which I interpret to mean that the carbon feedbacks could go on autopilot.