The level of the oceans could rise from 7 to 82 cm, by 2100, because of global warming, according to a study published, Sunday, July 26, which globally confirms the range of forecasts of the intergovernmental group on climate change (IPCC). The oceans should therefore not see their level increase by several meters by 2100, as some scientists had feared, according to the new study appearing in the scientific journal Nature Geoscience.
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More frequent flooding is, however, to be feared in some parts of the world, including deltas, according to Mark Siddall of the British University of Bristol, who led the work. "An increase of 50 cm would be very dangerous for Bangladesh, and for all the regions located at low altitude. And 50 cm, it is an average, locally, the rise could reach a meter, or even more", he emphasizes. keep.
"THE IMPACT ON SEA LEVELS OF WARMING WILL CONTINUE FOR MANY CENTURIES"
In a report published in 2007, IPCC experts predicted an increase in the level of the oceans from 18 to 59 cm, or even up to 76 cm if we take into account the melting of glaciers and sea ice, according to scenarios providing for a temperature rise from 1,1 to 6,4 degrees by 2100. The warming of seawater is enough to increase its volume, even without including the melting of ice whose only impact, on the rise of the sea level , was estimated at 17 cm by IPCC experts.
Mark Siddall's team used data from fossil corals and ice cores (a sample taken from the ice caps) to model the evolution of sea levels over the past 22 years. The researchers arrive at results similar to those of the IPCC, while using a different approach, "which reinforces the confidence with which one can interpret the results of the IPCC", underlines Dr Siddall. "Our model indicates that the impact on sea levels of 000th century warming will continue for many centuries into the future. And therefore be an important component of climate change," he concludes.
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