If CO 2 continue at current rates until the end of the century, atmospheric concentrations of greenhouse gases could reach levels of 30 to make 100 million years, thus leading to scenso temperatures reaching 31 º C average on the planet. Is the conclusion of a study led by Jeffrey Kiehl, a researcher at the National Center for Atmospheric Research USA (NCAR), published in the journal Science .
With the burning of fossil ombustibles c , atmospheric levels of carbon dioxide could reach 900 to 1,000 parts per million by the end of this century. Current levels are 390 parts per million and about pre-industrial 280 parts per million. "If we do not start to work seriously to reduce carbon emissions, we are putting the planet in a position that the human species has ever experienced," says Kiehl, a climate scientist who specializes in studying global climate during the geological past the Earth. "We will commit to civilization human to live in a different world for generations " he adds.
Through the analysis of molecular structures in fossilized organic materials, researchers have concluded that it is "likely" that carbon dioxide levels reached 35 million years ago levels of 900 to 1,000 parts per million. High levels of carbon dioxide in the ancient atmosphere remained the tropics between 5 and 10 º C above the temperature of the day, while the polar regions were between 15 and 20 º C higher than that today mark the thermometers.
0 comments:
Post a Comment