Since the 1970s, ocean surface temperatures around the globe have been on the rise--from one half to one degree Fahrenheit, depending on the region. Last summer, two studies linked this temperature rise to stronger and more...
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Since the 1970s, ocean surface temperatures around the globe have been on the rise--from one half to one degree Fahrenheit, depending on the region. Last summer, two studies linked this temperature rise to stronger and more frequent hurricanes. Skeptics called other factors into account, such as natural variability, but a new statistical analysis shows that only this sea surface temperature increase explains this trend. Climate researcher Judith Curry and her colleagues at the Georgia Institute of Technology looked at the hurricane records for storms between 1970 and 2004 in all of the world's ocean basins, yielding a total sample of 210 seasons over the six regions. They subjected the records to a mathematical test derived from information theory--so-called mutual information, which measures the amount of information two variables share, so that if they do not overlap at all this measure would be zero.
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