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    Global climate change

    A 99% Certainty that Warm Temperature Extremes will Increase

    11/18/2011, 5:01:18 AM

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    A draft copy of a final report on the assessment of extreme events and disasters that will soon be issued by the Intergovernmental Panel on Climate Change was recently obtained by Bloomberg News.

    Update: more details about this report are discussed on Climatewire.

    According to Bloomberg, the draft summary reveals that scientists from the IPCC indicate that it is "virtually certain" (99-100%) that warm daily temperature extremes will increase this century. Meaning there will be an increase in record high maximum temperatures and record high minimum temperatures globally this century.

    A NWS instrument shelter for measuring temperature and humidity.

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    Other conclusions from the "unofficial" draft summary......

    --"Likely" (66-100%) that human influences have led to a warming of extreme daily minimum and maximum temperatures worldwide.

    --The number of heavy rainfall events will increase.

    --Average maximum wind speed in hurricanes is likely to increase.

    --Hurricane frequency will decrease or remain the same.

    A key point from the Bloomberg story by Alex Morales.

    The IPCC has stated in its last three major assessment reports that “unequivocal attribution” to the causes of climate change is impossible because it would require a controlled experiment. There’s only one Earth. Instead, climate scientists have shown that trends are consistent with predicted change from pollution, and inconsistent with alternative explanations, such as solar variability or increased volcanic activity.

    Update: Here is the full report

    The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com

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    Global climate change