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Turning The Thermostat On And Off

October 4, 2013

By Paul Homewood

 

trend

http://www.woodfortrees.org/plot/hadcrut4gl/from:1941/to:1979/trend/plot/hadcrut4gl/from:1941/to:2013/plot/hadcrut4gl/from:1979/to:2001/trend/plot/hadcrut4gl/from:2001/to:2013/trend

 

The IPCC reckon they have 95% confidence that mankind is responsible for most of the warming since 1951.

 

Does that mean they also believe man was responsible for the cooling from 1951-1979, and the flatlining since 1998?

 

Only asking!!

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5 Comments
  1. Neil Hampshire permalink
    October 4, 2013 8:03 pm

    Paul,
    The correct statement is that the IPCC have 95% confidence that mankind is responsible for MORE THAN HALF of the warming since 1951.

  2. Brian H permalink
    October 4, 2013 8:47 pm

    Parsing IPCC equivocations is a losing proposition.

  3. October 4, 2013 10:48 pm

    The post World War 2 cooling (which Hansen has tried his best to flatten out via his “adjustments) coincided with a monstrous human induced CO2 increase and, yes, that is indeed quite inconvenient.

  4. Neil Hampshire permalink
    October 5, 2013 3:24 am

    “Most” of the world’s scientists think humans are responsible for global warming, doesn’t mean “more than half”. It is intended to mean “nearly all” of them.

    The final report has used the phrase “the dominant cause”. This is IPCC speak for “more than half” which was used in the draft reports.

    The 2007 report stated that it was “very likely” that humans were causing “most” of the warming.

    I am not a statistician, but is it true to claim that the latest IPCC statement is stronger when 2007 talked about MOST (taken to mean nearly all of) of the warming and 2013 now only talks about the dominant cause (“more than half”) of the warming?

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