There is a excellent climate science resource at Florida State University [h/t Mark Lander] titled
Ryan N. Maue’s 2010 Global Tropical Cyclone Activity Update
His latest update includes the summary
“Global TC [tropical cyclone] Activity remains at 30-year lows at least — The last 24-months of ACE [Accumulated Cyclone Energy] at 1090 represents a decrease from the previous months and a return to the levels of September 2009…Since Hurricane Katrina and the publication of Emanuel (2005) and Webster et al. (2005), global tropical cyclone ACE has collapsed in half.”
His website, with its very informative figures, is worth bookmarking.
Climate Science: Roger Pielke Sr. 