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Establishing A Connection Between Global Warming And Hurricane Intensity

Date:
August 15, 2006
Source:
American Geophysical Union
Summary:
Climate change is affecting the intensity of Atlantic hurricanes, and hurricane damage will likely continue to increase because of greenhouse warming, according to a new study. "The large increases in powerful hurricanes over the past several decades... certainly suggest cause for concern," the researcher said. "These results have serious implications for life and property...."

Hurricane Rita.
Credit: Image courtesy of NASA

Climate change is affecting the intensity of Atlantic hurricanes, and hurricane damage will likely continue to increase because of greenhouse warming, according to a new study. It provides for the first time a direct relationship between climate change and hurricane intensity, unlike other studies that have linked warmer oceans to a likely increase in the number of hurricanes.

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James Elsner of Florida State University in Tallahassee examined the statistical connection between the average global near-surface air temperature and Atlantic sea surface temperature, comparing the two factors with hurricane intensities over the past 50 years. He found that average air temperatures during hurricane season between June and November are useful in predicting sea surface temperatures--a vital component in nourishing hurricane winds as they strengthen in warm waters--but not vice-versa. Elsner's paper is scheduled to be published 23 August in Geophysical Research Letters, a journal of the American Geophysical Union.

Several recent studies have warned that human-induced climate warming has the potential to increase the number of tropical cyclones (hurricanes), and previous research and computer models suggest that hurricane intensity would increase with increasing global mean temperatures. Others, however, hypothesize that the relationship between sea surface temperatures and hurricanes can be attributed to natural causes, such as the Atlantic Multidecadal Oscillation, an ongoing series of long-term changes in the sea surface temperature of the North Atlantic Ocean.

"The large increases in powerful hurricanes over the past several decades, together with the results presented here, certainly suggest cause for concern," Elsner said. "These results have serious implications for life and property throughout the Caribbean, Mexico, and portions of the United States."

Using highly detailed data from the Intergovernmental Panel on Climate Change (IPCC) and the National Oceanographic and Atmospheric Administration (NOAA) to monitor sea temperature anomalies over the past half-century, Elsner used a causality test to establish evidence in support of the climate change/hurricane intensity hypothesis. His analysis helps provide verification of a linkage between atmospheric warming caused largely by greenhouse gases and the recent upswing in frequency and intensity of Atlantic hurricanes, including Katrina and Rita, which devastated parts of Mississippi, Louisiana, and Texas in 2005.

"I infer that future hurricane hazard mitigation efforts should reflect that hurricane damage will continue to increase, in part, due to greenhouse warming," Elsner said. "This research is important to the field of hurricane science by moving the debate away from trend analyses of hurricane counts and toward a physical mechanism that can account for the various observations."

The research was funded by the National Science Foundation and the Risk Prediction Initiative of the Bermuda Biological Station for Research.


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Cite This Page:

American Geophysical Union. "Establishing A Connection Between Global Warming And Hurricane Intensity." ScienceDaily. ScienceDaily, 15 August 2006. <www.sciencedaily.com/releases/2006/08/060815160934.htm>.
American Geophysical Union. (2006, August 15). Establishing A Connection Between Global Warming And Hurricane Intensity. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2006/08/060815160934.htm
American Geophysical Union. "Establishing A Connection Between Global Warming And Hurricane Intensity." ScienceDaily. www.sciencedaily.com/releases/2006/08/060815160934.htm (accessed November 23, 2014).

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