How many times have you read something like, "It's consistent with climate change models," or "it's probably caused by climate change"? It is the nature of scientists to be hesitant, nuanced, couched in their assessments and that includes the role that man-made global warming may be playing in severe weather events. Climate change denialists have exploited that sliver of doubt to support the preposterous notion that "the science isn't in yet" or that there's considerable disagreement on whether the theory of global warming is true. Well, those days are over.
Two studies have just been released. A British team examined the massive floods that hit Britain in October and November, 2000. A Canadian team, led by Francis Zweirs of the University of Victoria, examined the same impact of man on hydrological cycles but on a northern hemispheric scale. Both studies, published in the journal Nature, concluded that, "there has been a 'substantial' increase in the intensity of heavy-precipitation events over large parts of the Northern Hemisphere due to greenhouse gas generated by the burning of fossil fuels and other human activities."