Målmedveten geoengineering orsakar år 2017 orkanernas snabba intensifiering?
‘Rapid intensification’ fuels major Atlantic hurricanes in 2017
Storms gain strength in hours, not days
By BRANDON MILLER, CNN METEOROLOGIST, AND MATT WOTUS
(CNN) – It usually takes several days to a week for a tropical storm to grow into a hurricane. But if conditions are just right, a powerful major hurricane can develop in just hours.
The process, known as “rapid intensification,” has happened four times in the last month with hurricanes Harvey, Irma, Jose, and now Maria. A normal year would only see around two storms rapidly intensify.
A storm undergoes rapid intensification when its maximum sustained winds increase at least 35 mph in 24 hours or less, according to the National Hurricane Center. That’s a jump of about two categories on the Saffir-Simpson scale, which grades hurricane strength from 1 to 5.