Despite predictions from a top U.S. polar institute that the Arctic Ocean's overall ice cover is headed for another "extreme" meltdown by mid-September, the Environment Canada agency monitoring our northern waters says an unusual combination of factors is making navigation more difficult in the Northwest Passage this year after two straight summers of virtually clear sailing.
In both the wider, deep-water northern corridor and the narrower, shallower southern branches of the passage, the Canadian Ice Service says pockets of more extensive winter freezing and concentrations of thicker, older ice at several key "choke points" are complicating ship travel.
The fabled trans-Arctic sea route, zealously sought by European explorers in centuries past as a shortcut to Asia, is increasingly seen in today's era of rapidly retreating sea ice as a potential highway to resource riches and Arctic tourist destinations.
A record number of vessels passed through Canada's Arctic islands last year, and experts have been predicting a steady rise in ship traffic in both the Northwest Passage and the Northern Sea Route, which connects Europe to eastern Asia along Russia's Arctic coast.
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