“extremely likely” that man is primarily responsible for global warming, according to the latest report of the Intergovernmental Panel on Climate Change (IPCC) released on Friday in Stockholm.
IPCC experts, who have updated the progress made since the previous report in 2007, raised the level of certainty of 90% to 95% over the previous document, which claimed it was “very likely” the responsibility of human activity since 1950.
sea level could rise between 26 and 82 centimeters by the end of the century, a range higher than targeted in 2007 when there was talk of a rise of between 18 and 59 inches, according to experts of the IPCC, which provide that the temperature of the Earth increases from 0.3 to 4.8 degrees in 2100.
IPCC creates four possible scenarios by the end of the century, the most optimistic to the most pessimistic, depending on human intervention at this time. Therefore, in the most optimistic scenario foresees that the temperature of the Earth is only 0.3 ° degrees and reheat in the most pessimistic to rise to 4.8 °, taking as a barometer average temperatures from 1986 to 2005, also have account, in particular, the greenhouse effect, ie the emission of gases into the atmosphere in the coming decades. The Earth has already warmed by 0.8 degrees from pre-industrial times.
“Limiting global warming will need substantial and lasting reduccioones of gas emissions covered,” said in a statement Thomas Stocker, vice chairman of the IPCC. Experts predict also that the intense emission increase extreme weather events.
“Heat waves are it probably will to occur more frequently and for longer. With the global warming currently wet regions will see more rainfall and dry receive even less,” according to Stocker.
respect to sea level rise, whose forecasts have changed much since the 2007 report, the experts justified because now they have taken account of a phenomenon that had not been contemplated then enough: the thaw of Greenland and the Antarctica.
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