Many countries experience the most intense heat of 11,300 years

One study found that many countries have experienced the worst heat wave in 11 millennia.

Shaun Marcott, a scientist at the University of Oregon in the US, and his colleagues used the tiny ancient fossils they found on the ocean floor to model the average global temperature for 11,300 years. , AP reported.

The results show that the decade from 1900 to 1910 was the coldest decade in 11,300 years. But only 100 years later, the decade from 2000 to 2010 was the hottest decade.

Last year's heatwave was the most intense heat wave in 11,300 years.

"Within 100 years, the global average temperature has fluctuated from the lowest to the highest level. We have never seen such a rapid fluctuation in temperature. Even in the Ice Age, the average average temperature demand has never changed as quickly as in the last 100 years , " said Marcott.

Marcott's data showed that after the Ice Age ended about 7,000 years ago, the average global temperature had to "wait" for 4,000 years to increase by 1.25 degrees Celsius. In the 40s, the average temperature also increased with the same level.

"Research shows that the temperature in the last heatwave reached its highest level in more than 11,000 years," said Professor Michael Mann, an expert at the University of Pennsylvania in the US. He did not participate in the study of Marcott group.

The US, Canada, Australia and many European countries suffered a record heat wave last summer. For example, the temperature in the US capital of Washington reaches 41 degrees Celsius on July 7, 2012. Temperatures in France, Spain, Italy, Croatia and Switzerland exceeded 40 degrees Celsius for several days last August, causing dozens of forest fires. Fires also raged in parts of Australia, where temperatures reached more than 45 degrees Celsius in the first month of this year.