-MAC will generate the longest sea ice reanalysis and counting the largest number of ensemble members available up to date, at a ground-breaking resolution and exploiting the latest high quality and high resolution satellite products available. MAC will allow for the most robust estimate of the Arctic sea ice changes over the last decades and its uncertainty performed up to date and therefore deliver crucial information about Arctic changes monitoring, being hence a project of scientific excellence. MAC will also provide the most trustworthy sea ice initial conditions to train dynamical climate prediction systems and estimate future Arctic changes. The final results will be of utmost interest for local ecosystems and populations as well as for industries willing to invest in this region. Finally, MAC will assess to what extent NWP can benefit from using the high quality sea ice data for atmospheric analyses and forecasts, particularly for high-impact weather events with drastic human and economic consequences such as polar storms and even in mid latitudes. Therefore these results will be of key social significance.
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