The IPCC global experts presented their report on Friday global warming. The most optimistic scenario shows an increase in temperature of 0.3 degrees and a rise in sea level of 26 cm by the end of the century. But if carbon dioxide does not fall quickly, the temperature could rise by 4.8 degrees and sea rise of 82 cm. Invited on the set of LCI, Robert Kandel, astrophysicist, emeritus research director at CNRS, explains why increasing the surface temperature of the Earth would be a disaster.
wells will dry up. “The rise in temperature means an increase in the arrival of energy, and therefore heat that enters the ocean . And this changes the evaporation of water, “said Robert Kandel. The same phenomenon occurs for fresh water, which means a dry well, he said. “For life, fresh water available is one aspect of the climate at least as important as the temperature itself.”
sea level will rise. At the same time, heat contributes to the rise of sea level with “glacier retreat on the various mountain ranges the disappearance of ice in the Arctic, Greenland and possibly Antarctic, “worries the scientist.
increasing carbon dioxide present in the air. While human activity is blamed, the specialist said that it is above all the CO2 it emits into the atmosphere which jeopardizes climate. “It is clear that humans modify the composition of the air. By burning coal, oil, natural gas, carbon dioxide increases in the atmosphere. Atmosphere and returns a portion of this CO2 in vegetation and in the ocean, but cautioned about half, “he says. So the rate is increasing year by year.
temperature can make a leap by 2100. “If we do not radically change our energy production technologies and the way we live, if we continue increasing CO2 emissions, we are heading towards disaster scenario where the temperature will increase by the end of the century as it increased at the end of the Ice Age, “worries Robert Kandel.
Many speeches, little action. The climate scientist is concerned especially that “there is a lot of talk, but we know they will not really followed the facts. ” This is why he believes that “there need for further research to better understand where we are going. According to him, to improve people’s lives,” we must both think and act. “
Read also: Climate, it does not get better: the conclusions of the IPCC
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