Experts reflect on intensity of hurricanes
A recent study claims global warming is to blame for a growing intensity of tropical storms, but it remains unclear whether warming was to blame for the severity of Hurricane Katrina, scientists say. In August, Massachusetts Institute of Technology climatologist Kerry Emanuel reported in the journal "Nature" that major storms spinning in both the Atlantic and Pacific oceans have increased in duration and intensity by about 50 percent since the 1970s. During that period, global average temperatures have risen by about 1 degree Fahrenheit along with increases in the level of carbon dioxide and other heat-trapping pollutants from industry smokestacks, traffic exhaust and other sources. It makes sense that Hurricane Katrina was such an intense storm because the Gulf of Mexico's temperature was above average before it hit, said David Hyndman, associate professor in the MSU Department of Geological Sciences. "When you warm sea-surface temperature, you are getting stronger storms," Hyndman said. Global warming spurred by human activity has everything to do with the growing strength of tropical storms, Hyndman said.