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Published: Friday 13 September, 2013

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Forest fires, droughts and floods are all likely to become more severe and more common if global warming heats the planet as seriously as some scientists predict.

A study of what may happen if global average temperatures rise by 3C or more over the next 200 years suggests that extreme weather events are going to be more frequent and more severe.

The stu isabel marant buy online uk dy also warns that vegetation could lose its ability to be a net absorber of carbon dioxide, and instead become a net producer of greenhouse gases.

Marko Scholze, a climate scientist at Bristol University in England, said the research showed that if the average world temperat isabel marant buy online uk ure rose by more than 3C over the next 200 years, as widely predicted, there was a higher risk of extreme instances of forest fires or floods.

We looked at these extre isabel marant buy online uk me events and what we found was that a onceinahundredyear event can become a onceina10year event by the end of the century, he said.

The study analysed 52 computer models of the worlds climate. Researchers found that as temperatures rose, so did the risk of forest fires, droughts and flooding caused by the sudden runoff of heavy rainfall.

Even if we stop emitting greenhouse gases today, temperatures are still likely to continue increasing because of the inherent inertia of the worlds climate system.

A 2C increase in average temperatures increases by 30 per cent the risk of significant deforestation in the northern forests of Eurasia, eastern China, Canada, and the tropical rainforests of central America and the Amazon.

This risk would rise to 60 per cent and affect wider areas if temperatures rose by 3C.

Other effects of higher temperatures include less freshwater and a greater risk of more intense droughts in west Africa, central America, southern Europe and the eastern states of America.

But one of the most dangerous scenarios depicted in the study involves land vegetation.

Vegetation takes up carbon dioxide. About half of what we emit is taken up by plants, Dr Scholze said.

But when temperatures rise above 3C, the absorbing effect of carbon dioxide by plants is outweighed by the increase in organic decomposition within the soil, which increases with temperature. isabel marant buy online uk