Tornadoes and thunderstorms, how global warming adds to their intensity and wrath.

In a warmer world thunderstorms and damaging winds will become regular.

More thunderstorms and damaging tornadoes are expected to occur because of climate change, according to speakers at the seventh European Conference on Severe Storms being held in Helsinki, Finland.

Read full story here in Mother Nature Network

But because thunderstorms are small in size on the scale of existing climate models it is not possible to tell whether they will also lead to more tornadoes and larger size hail – two of the most damaging problems associated with severe storms.

In a warmer world, increases in surface temperature and moisture create conditions for more frequent – and intense – thunderstorms, researchers say.

Climate change also decreases the temperature difference between the poles and the equator. Harold Brooks, a researcher into severe thunderstorms at the National Severe Storms Laboratory in the Norman, Okla., is optimistic.

"According to latest research, the intensity of tornadoes will not increase, therefore incidents like in Oklahoma are not expected to be more frequent than today," Brooks said.

"However, most of the research on severe thunderstorms and tornadoes in climate change has focused on the United States and it is unclear how well the lessons learned there apply to the rest of the world."

While tornadoes are less of a problem outside the United States, heavy hail frequently causes severe crop losses and property damage in Central and Eastern Europe, across Bangladesh, India and other large land masses. Early warnings like air raid sirens are sounded so people can take shelter to avoid injury from hailstones.

Even in Finland, where the severe storms conference is taking place, lightning, strong wind gusts and hail from thunderstorms are the most damaging severe weather incidents.

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