The melting of the Greenland ice sheet could lead to a sea level rise of 18 cm in 2100!

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IMAGE: Evolution of the surface mass balance (snowfall - melting) with the old (cmip5) and new (cmip6) scenarios. The blue colour indicates a mass loss in mm/year
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Credit: ©Université de Liège / X.Fettweis
A new study, headed by researchers from the Universities of Liège and Oslo, applying the latest climate models, of which the MAR predicts a 60% greater melting of the Greenland ice sheet than previously predicted. Data that will be included in the next IPCC report. This study is published in
Nature Communications.
The Greenland ice sheet, the second largest after the Antarctic's, covers an area of 1.7 million square kilometres. Its total melting could lead to a significant rise in ocean levels, up to 7 metres. Although we are not there yet, the previous scenarios predicted by climate models have just been revised upwards, predicting a rise in sea levels of up to 18 cm by 2100 (compared to the 10 cm announced previously) just because of the increase in surface melting. Within the framework of the next IPCC report (AR6) which will appear in 2022, the University of Liège Laboratory of climatology has been led to apply, within the framework of the ISMIP6 project, the MAR climate model which it is developing to downscale the old and new IPCC scenarios. The results obtained showed that for the same evolution of greenhouse gas concentrations till 2100, these new scenarios predict a 60% greater surface melting of the Greenland ice cap than previously estimated for the previous IPCC report (AR5, 2013).

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