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CO2 Questionnaire  

28 members have voted

  1. 1. Do you believe that CO2 is a Greenhouse Gas, capable of producing a warming effect?

    • Yes
      24
    • No
      3
  2. 2. All other feedbacks excluded, what temperature increase would you expect from a doubling of atmospheric CO2 concentration alone?

    • No warming
      3
    • 0-0.5C
      4
    • 0.5C to 1.5C
      7
    • 1.5C to 2.5C
      8
    • >2.5C
      5
  3. 3. Including other feedbacks, what do you think the equilibrium climate sensitivity to a doubling of CO2 is?

    • No effect
      3
    • 0-0.5C
      1
    • 0.5C to 1.5C
      5
    • 1.5C to 2.5C
      4
    • 2.5C to 3.5C
      8
    • 3.5C to 4.5C
      3
    • 4.5C to 5.5C
      1
    • 5.5 to 6.5C
      1
    • >6.5C
      1


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Two years ago, a few polls were posted about CO2 and climate sensitivity, and there were 26 or so responses. The old poll can be seen here.

So I thought, seen as some time has passed, to post up the same questions and see how things have changed, if at all.

Like last time, voting is set to private.

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Now with 23 votes average for equilibrium sensitivity is nearer 3C with warming from doubling alone around 1.5C. It will be interesting to see how the Sun going into a Maunder Minimum-type quiet phase and possible volcanic eruptions over the next twenty years impact on the predicted global mean temperatures due to rising CO2 levels, should these do so.  

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Damn, this poll was closed before I got a chance to vote!  My answers would have been as follows:-

1)  Yes I believe that CO2 is a Greenhouse Gas, capable of producing a warming effect.

2)  All other feedbacks excluded, I expect a temperature increase of >2.5C (3C best case and 5C worst case) from a doubling of atmospheric CO2 concentration alone.

3)  Including all other feedbacks on top of a doubling of C02 I expect a global temperature increase of >6.5C (probably in the region of 20C give or take 2C if the worst possible scenarios happen).

Edited by Lettucing Gutted
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