A new study has bolstered the theory that global warming may be contributing to stronger hurricanes in the Atlantic.
Recent studies have tried to explain why strong hurricanes in the Atlantic Ocean are getting more and more vicious- and the answer they’ve hit upon is “global warming’.
A study was carried out by FSU (Florida state University) geography Professor James B. Elsner, University of Wisconsin-Madison Professor James P. Kossin and FSU postdoctoral researcher Thomas H. Jagger.
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This is consistent with the "heat-engine" theory of cyclone intensity.
"As seas warm, the ocean has more energy that can be converted to tropical cyclone wind," Elsner said. "Our results do not prove the heat-engine theory. We just show that the data are quite consistent with it," he added.
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Under the heat-engine theory, every storm will lose some energy through inefficiency, and that loss will limit the storm's potential. The MPI represents the storm's maximum potential under ideal environmental conditions.
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The researchers created a data set from satellite observations of hurricane intensity of all tropical cyclones around the globe and looked at the maximum wind speeds for each one during a 25-year period.
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The researchers found that the strongest tropical cyclones are getting stronger, particularly over the North Atlantic and Indian oceans.
Wind speeds for the strongest tropical storms increased from an average of 140 mph in 1981 to 156 mph in 2006, while the ocean temperature, averaged globally over the all regions where tropical cyclones form, increased from 28.2 degrees Celsius to 28.5 degrees Celsius during this period.
"By creating a better, more consistent historical data set, we've been able to weed out quality issues that introduce a lot of uncertainty," Kossin said.
"Then, by looking only at the strongest tropical cyclones, where the relationship between storms and climate is most pronounced, we are able to observe the increasing trends in storm intensity that both the theory and models say should be there," he added.
Source-ANI
TAN/M
