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Arctic Stewardship: Maintaining Regional Resilience in an Era of Global Change

Published online by Cambridge University Press:  21 December 2012

Extract

That the Arctic is undergoing transformative changes driven in large part by external forces is no longer news. The high latitudes of the Northern Hemisphere, which are not themselves significant sources of anthropogenic emissions of greenhouse gases (GHGs) or short-lived climate pollutants (such as black carbon soot), are experiencing effects attributable to climate change that are equal to or greater than those occurring in any of the planet's other large regions. Prominent among these effects are rising surface temperatures, a deepening of the active layer of the permafrost, the collapse of sea ice, increases in the intensity of coastal storm surges made possible by the retreat of sea ice, the accelerated melting of the Greenland ice sheet, and the acidification of marine systems. The deposition of black carbon in the high north alone—almost 60 percent of which is thought to originate in Europe—appears to account for half or more of the increase in temperature occurring in the Arctic. Positive feedback processes, such as lowered albedo (that is, the capacity of Earth's surface to reflect incoming solar radiation back into space) following the melting of ice at sea and snow on land, have the effect of magnifying the impact of these external forces. Nowhere is the challenge of adapting to the impacts of climate change more urgent than in Arctic coastal communities confronted with the need to relocate to avoid physical destruction. And nowhere are the threats to individual species (for example, the polar bear) and whole ecosystems more severe than they are in the Arctic, where biophysical changes are outstripping the capacity of plants and animals to adapt to altered conditions.

Type
Essay
Copyright
Copyright © Carnegie Council for Ethics in International Affairs 2012

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References

NOTES

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