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Global warming could lead to “supertyphoons” strike in Japan

26 September 2009 1,359 views No Comment

Washington, September 26 (ANI): Scientists have warned that increasingly powerful “supertyphoons” will strike Japan if global warming continues to affect weather patterns in the western Pacific Ocean.

According to a report in National Geographic News, supercomputer simulations show there will be more typhoons with winds of 179 miles (288 kilometers) per hour—considered an F3 on the five-level Fujita Scale—by 2074.

By definition, supertyphoons carry winds of at least 150 miles (241 kilometers) per hour.

Such storms would be more destructive than Hurricane Katrina, which slammed into US states along the Gulf of Mexico in August 2005.

“The most important factor in the creation of these typhoons is the warming of sea-surface temperatures in the western Pacific,” said researcher Kazuhisa Tsuboki of Nagoya University.

If global warming continues at its present pace, by 2080, the western Pacific Ocean will be 3.6 degrees Fahrenheit (2 degrees Celsius) warmer, according to Tsuboki, who worked with a team from Japan’s Meteorological Research Institute.

“That sounds like a small difference, but it will have a very big impact on a typhoon,” Tsuboki said.

“That’s because even a relatively minor increase in seawater temperature adds an exponentially larger amount of energy to a storm,” he said.

A rise in air temperature will also increase the amount of water vapor in the lower atmosphere, adding yet more fuel to the system.

Typhoons generally cover an area of between 311 and 497 miles (500 and 800 kilometers).

But to the researchers’ surprise, the predicted supertyphoons will be smaller, stretching only 249 miles (400 kilometers).

However, the storms will pack a far higher concentration of energy, wind speed, and overall destructive power.

“The tempests would cause a great deal of damage across Japan, which is unprepared for such violent weather systems,” Tsuboki said.

Ferocious winds would level homes and damage infrastructure such as bridges and power lines. Severe floods would also inundate low-lying areas.

source from:Copyright © 2009 Sindh Today

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