<p><br> The Arctic Ocean's sea ice is in a "death spiral" due to rising temperatures, scientists said in 2008. Many marine species, such as these narwhals swimming through a bay in Nunavut, <a href="http://travel.nationalgeographic.com/travel/countries/canada-guide/">Canada</a>, depend on the ice throughout their life cycles. Experts predict that summer Arctic ice may completely disappear within a few decades.</p>

Arctic Circle Ice


The Arctic Ocean's sea ice is in a "death spiral" due to rising temperatures, scientists said in 2008. Many marine species, such as these narwhals swimming through a bay in Nunavut, Canada, depend on the ice throughout their life cycles. Experts predict that summer Arctic ice may completely disappear within a few decades.

Photograph by Paul Nicklen

Arctic Climate Change

The Arctic is warming faster than any region on Earth. See how climate change is dramatically transforming this polar landscape and the animals and plants that depend on it.

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