Atlantic hurricanes have doubled in the past century, in part due to warmer seas, a new study says.
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'Missing' storms
However, Chris Landsea, at NOAA's National Hurricane Center, says that improvements in monitoring and technology over the last century mean that storms that were not picked up by meteorologists in the past are no longer overlooked (PDF). These improvements include more shipping traffic, aircraft reconnaissance and satellites, as well as even newer technologies such as satellite microwave data and sophisticated analysis techniques.
"When one takes into account these 'missing' storms, the upward trend disappears and large [long-term] variations remain," Landsea told New Scientist. "This is consistent with previous studies that suggest that the main variability in Atlantic storms is dictated by the Atlantic Multi-decadal Oscillation and that there is little to no impact of global warming on the number of tropical storms."