Using a well-accepted metric called the Accumulated Cyclone Energy index or ACE for short (Bell and Chelliah 2006), which has been used by Klotzbach (2006) and Emanuel (2005) (PDI is analogous to ACE), and most recently by myself in Maue (2009) , simple analysis shows that 24-month running sums of global ACE or hurricane energy have plummeted to levels not seen in 30 years.
UPDATE: A hurricane version of the Gore Effect?
UPDATE: Killer tornados down by 2/3, 2009 deaths only 17% of last year's total...
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