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Divergent long-term trajectories of human access to the Arctic
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Journal Article
Divergent long-term trajectories of human access to the Arctic
2011
Overview
Subzero temperatures at high latitudes typically restrict shipping but facilitate ground transportation. A study quantifies the impacts of climate change on Arctic transportation by mid-century and finds that all eight Arctic states will probably suffer steep declines in inland transport, but will reap the benefits of faster sea travel.
Understanding climate change impacts on transportation systemsis particularly critical in northern latitudes, where subzero temperatures restrict shipping, but enable passage of ground vehicles over frozen soil and water surfaces. Although the major transport challenges related to climate warming are understood, so far there have been no quantitative projections of Arctic transport system change. Here we present a new modelling framework to quantify changing access to oceans and landscapes northward of 40° N by mid-century. The analysis integrates climate and sea-ice model scenarios
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with topography, hydrography, land cover, transportation infrastructure and human settlements. Declining sea-ice concentration and thickness suggest faster travel and improved access to existing (+5 to +28%) and theoretical (+11 to +37%) offshore exclusive economic zones of Canada, Greenland, Russia and the US. The Northern Sea Route, Arctic Bridge and North Pole routes are projected to become fully accessible from July–September, averaging ∼11, 15 and 16 days to traverse, respectively, whereas the Northwest Passage will not. All eight Arctic states are projected to suffer steep declines (−11 to −82%) in accessibility inland, driven by lost potential for winter road construction caused by milder winters and deeper snow accumulation.
Publisher
Nature Publishing Group UK,Nature Publishing Group
