Sentences with phrase «ice concentrations less»

Not exact matches

This actually will be come less relevant as the real shocker seems to have arrived http://ocean.dmi.dk/arctic/icecover.uk.php and soon the temperature one re R Spencer Thanks to S Goddard for highlighting the NH ice concentration so much previously the AGW «ers discounted it NB tried posting previous so repeat here

We also know the bottom limit - complete icing, that is, the «white ground» when the level of CO2 concentration was insignificant - less than 200 ppm.

A 40 % concentration cutoff; open water areas could have sea ice at concentrations less than 40 %.

Whereas the mid-LIG summer sea ice concentrations were still around 60 to 75 % in the central Arctic Ocean, but only around 20 % or less along the Atlantic - Water influenced Barents Sea continental margin, nearly ice - free conditions might be reached in the entire Arctic Ocean in 2300.

The statistical manipulation of raw measurement data of CO2 concentration in air from both within polar ice and atop a volcano in the middle of the pacific requires no less scrutiny by independent expert statisticians than the temperature analyses warranted.

As concentrations of atmospheric greenhouse gases increase and the climate warms, it is expected that there will be increased precipitation in mid-latitudes and less formation of sea ice.

If diffusion continued through time you would expect the further back in time you went in the ice cores the less you would see differences in the levels of the gas concentrations until at some point you would have a constant concentration.

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 less than a halving or doubling of CO2 concentrations in the atmosphere moved the Earth from ice age to interglacial and back again.