Dr. Robert Davis has shown some research results to the meeting of the Association of American Geographers which is being held in San Francisco this year
(Dr. Davis’s presentation was scheduled for 4 p.m. Friday April 20, 2007). Hurricanes are powered by the temperature difference between the top of the sea and the air above the storm, and there’s nothing so strange why Hurricane Dean has emerged back into the Gulf of Mexico on Tuesday, entering the Bay of Campeche.
Is there changes in rainfall, which causes flooding that has been responsible for many deaths and damage in recent storms? In fact, there is so many active periods of hurricane behaviors that are documented in the historical record of Atlantic tropical cyclone observations and a measure of the power dissipated by tropical cyclones (proportional to the cube of wind speeds accumulated over the North Atlantic and western North Pacific basins) has approximately doubled since about 1950!
Now, Dean is expected to hit central Mexico on Wednesday and Mexico’s president cuts short a meeting in Canada to return home, because Hurricane weakens to Category 1 after hitting as Category 5, but may strengthen. It is consensus statement of the scientists that no individual tropical cyclone can be directly attributed to climate change, but it is true also that the tropical cyclone wind-speed monitoring has changed dramatically over the last few decades leading to difficulties in determining accurate trends!!
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