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View Diary: New study: Amount of warming from increasing CO2 levels 'overestimated' (28 comments)

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  •  Science is a top peer reviewed journal (3+ / 0-)
    Recommended by:
    Neuroptimalian, ORDem, ozsea1

    Gasoline made from the tar sands gives a Toyota Prius the same impact on climate as a Hummer using gasoline made from oil. ~ Al Gore

    by Lefty Coaster on Fri Nov 25, 2011 at 10:03:36 PM PST

    [ Parent ]

    •  Missing from the diary (1+ / 0-)
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      diffrntdrummr

      Which scientists did the study? And what climate sensitivity did they come up with?

      •  Old: 3C, New: 2.7C (4+ / 0-)

        As I recall from other news outlets, the previous IPCC estimate was for values between 2 and 4.5C, with 3C being the most likely value. The new study gives a value around 2.7C as the most likely.

        So it's not much of a drop at all, and it's only one study. Don't get your hopes up too much.

        Also, that's a value for 'warming based on a doubling of CO2', and we're on track to generate much more than a doubling of CO2. So we may get the same amount of warming as predicted, but it'll be based on less sensitivity but more CO2.

        •  In the interest of accuracy the New = 2.3K (1+ / 0-)
          Recommended by:
          Ashaman

          versus the prior prediction of 3K and probably more importantly the 66% probability range is reduced to 1.7K - 2.6K and the risk of more extreme responses which is low in the curent models seems to be much reduced in their current analysis.

          But I absolutely agree with you, only one study, I am definitely not getting my hopes up, but for our sake I do hope that they are right.  

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