Arizona Summers Getting Cooler Since CO2 Hit 350 PPM

ScreenHunter_449 Jun. 29 07.12

About stevengoddard

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4 Responses to Arizona Summers Getting Cooler Since CO2 Hit 350 PPM

  1. Andy DC says:

    Low last night in Phoenix was 91, which is impressive, but still nowhere near their all time highest low temperature record of 96.

  2. Dave says:

    A new presentation by Murray Salby shows ice age concentrations of CO2 got much higher than todays 400 ppm during the warm part of the cycle. Thrust of the presentation is ice cores seriously underestimate atmospheric concentration.

  3. gregole says:

    This absolutely squares with my experience. 1995 was a hot summer. Since then it has not been as warm here.

    Incidentally, I just got back from a couple of mile hike with my dogs (yes I brought water for them and we hung out in the shade!) and allegedly it is 117 F on the way to 120F. Hope we make it to 120F. I’m bar-be-queing tonight. It’s going to be awesome.

  4. F. Guimaraes says:

    We can see the solar cycles (and Pinatubo) in this chart, but no CO2.

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