For example, climate sensitivity: how much warming should we expect with a doubling of CO2?
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The lower climate sensitivity is the cheaper it is going to be to deal with it.
FORBES: Lower Climate Sensitivity Means That Climate Change Becomes A Much Cheaper Problem To Solve
Put otherwise, climate sensitivity measures how fast temperatures are likely to rise as a result of atmospheric GHG.
Existing studies of climate sensitivity mostly rely on data gathered from weather stations, which go back to roughly 1850.
Guessing in the most informed manner possible, using all of the scientific tools available but no one knows what climate sensitivity is.
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We would all like climate sensitivity to be lower but it isn't.
The IPCC said that climate sensitivity was in the range of 2.0-4.5C.
From which the takeaway point is that perhaps climate sensitivity is lower than currently thought and thus climate change is less dangerous than currently thought.
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However, the one part that has always worried me (and I can point to a decade of making this same point) is that climate sensitivity.
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Climate sensitivity is a key parameter for estimating the long-term temperature increase expected from a doubling of the concentration of greenhouse gas emissions in the atmosphere.
She and her colleagues found that 80% of the variation in the climate sensitivity predicted was due to changes in how clouds were described in the model.
Over in the New York Times Andy Revkin has a piece discussing the way that the general scientific view is that climate sensitivity is lower than many had previously assumed.
FORBES: Lower Climate Sensitivity Means That Climate Change Becomes A Much Cheaper Problem To Solve
Climate sensitivity is how much will the temperature change over a doubling of atmospheric CO2 (more strictly, CO2-e, taking account of methane and all the other gasses and converting them to CO2 equivalents).
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If, and please note the if is very important here, climate sensitivity is two degrees, this gives us perhaps another 40 to 50 years before we really must, must, be reducing our carbon emissions.
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Other work focused on the warming and cooling effects of clouds and the climate's sensitivity to greenhouse gases.
His group is not the first to use such data (ice cores, fossils, marine sediments and the like) to probe the climate's sensitivity to carbon dioxide.
One major unsettled issue in climate science indeed is what this sensitivity is, and several threads of information, including the surface temperature history, and water vapor and cloud data argue Lindzen may be correct.
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The sensitivity of mountains to global climate change has gradually emerged over the past few decades.
Another way of putting this same point is that yes, even with a low sensitivity we did need to do something to beat climate change.
FORBES: Lower Climate Sensitivity Means That Climate Change Becomes A Much Cheaper Problem To Solve
Looking at the more recent record, logged as it has been by thermometers, you might hope it could shed light on which of the climate models is closest to being right, and thus what the sensitivity actually is.
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