Hurricane-calming technology? Bill Gates has a plan

— -- Good news, folks. Microsoft founder Bill Gates has turned his attention to controlling the weather.

Five U.S. Patent and Trade Office patent applications, made public on July 9, propose slowing hurricanes by pumping cold, deep-ocean water in their paths from barges. If issued, the patents offer 18 years of legal rights to the idea for Gates and co-inventors, including climate scientist Ken Caldeira of the Carnegie Institution of Washington.

Hurricanes, most famously demonstrated by the deadly intensification of Hurricane Katrina before its landfall in 2005, draw strength from warm waters on the ocean's surface. The patents describe a system for strategically placing turbine-equipped barges in the path of storms to chill sea surfaces with cold water pumped from the depths.

First requested by Gates and colleagues last year, the patents describe methods "not limited to atmospheric management, weather management, hurricane suppression, hurricane prevention, hurricane intensity modulation, hurricane deflection" to manage storms.

Given the scope of the applications, "I suspect these will have a lengthy stay in the examiner's office. They are talking about some interesting issues here," says patent expert Gene Quinn of IPWatchdog.com.

The Bill & Melinda Gates Foundation and Caldeira declined to comment on the patents.

"The bottom line here is that if enough pumps are deployed, it is reasonable to expect some diminution of hurricane power," says hurricane expert Kerry Emanuel of the Massachusetts Institute of Technology. He is not part of the patent effort. Cutting sea surface temperature by 4.5 degrees under the eye of a hurricane would actually kill a storm, he adds. "This would have to be done on a massive scale, but is still probably within the realm of feasibility."

Says climate scientist Michael Mann of Pennsylvania State University in State College: "Needless to say, there is a whole lot of skepticism about this among tropical meteorologists. But it's not so ridiculous that I would actually dismiss it out of hand. There is certainly an important role of upper ocean mixing on tropical cyclone behavior."