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In research published in 2023, scientists found that mountain snow lines in California have already crept higher because of rising temperatures, and they projected the mountains could lose more than half of their seasonal snow cover in the second half of the century if nothing is done to slow the pace of global warming.

In places that are still experiencing snow cover, it could be as cold as -14C to -16C on Wednesday night, and on Thursday the Pennines and snow fields of Scotland could register temperatures as low as -16C to -20C.

The concurrent loss of sea ice with depletion in snow cover significantly affects their preferred diet of ringed seals, which have a hard time keeping pups alive in their birthing dens if snow levels drop below 32 centimeters.

Backed by data on soil moisture, temperature, snow cover, meltwater runoff, reservoir levels and more, the map has become an essential instrument for determining the outlook of water supplies, declaring drought emergencies and deciding where and when government aid should be distributed, among other things.

These findings are particularly significant in Canada, where snow cover persists for three-to four months of the year in major cities like Ottawa and Toronto, and 65% of the country's vast landmass experiences snow cover for over half the year.