http://www1.ncdc.noaa.gov/pub/data/cmb/bams-sotc/2011-peterson-et-al.pdf
More conservative estimates put it at a 1 in 100000 chance.
This is not to say climate changed "caused" the heat wave, but the likelihood of the heatwave occurring can be attributed to climate change. Here's a nice video explanation:
[video=youtube;MW3b8jSX7ec]http://www.youtube.com/watch?feature=player_embedded&v=MW3b8jSX7ec[/video]
More conservative estimates put it at a 1 in 100000 chance.
This is not to say climate changed "caused" the heat wave, but the likelihood of the heatwave occurring can be attributed to climate change. Here's a nice video explanation:
[video=youtube;MW3b8jSX7ec]http://www.youtube.com/watch?feature=player_embedded&v=MW3b8jSX7ec[/video]
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