The 50-50 argument

Bob Tisdale:

Judith, thanks for making this a separate thread. It’s an extremely important topic. The Gavins of this world will fight you tooth and nail on this, because they have tuned their models to a naturally occurring upswing in the surface temperatures–regardless of whether that upswing was caused by ENSO, the AMO, or other factors. Therefore, the Gavins of the world have likely doubled the expected warming, climate sensitivity, etc.

Originally posted on Climate Etc.:

by Judith Curry

Pick one:

a)  Warming since 1950 is predominantly (more than 50%)  caused by humans.

b)  Warming since 1950 is predominantly caused by natural processes.

View original 2,357 more words

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About Bob Tisdale

Research interest: the long-term aftereffects of El Niño and La Nina events on global sea surface temperature and ocean heat content. Author of the ebook Who Turned on the Heat? and regular contributor at WattsUpWithThat.
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4 Responses to The 50-50 argument

  1. So, I interpret this as scything that the IPCC’s best estimate is

    >

  2. Pingback: Climate Nonsensus: Only Half Of U.S. Meteorologists Think Global Warming Is Man-Made | The Global Warming Policy Foundation (GWPF)

  3. Thanks for the tip, Bob.
    Yes, Curry steps into dangerous territory and finds an inconvenient fact: The IPCC’s GCM models were conceived wrongly.

  4. Pingback: Climate Nonsensus: Only Half Of U.S. Meteorologists Think Global Warming Is Man-Made | The Global Warming Policy Foundation (GWPF)

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