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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
Overview

Sea Level Rise

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Screenshot from"Climate Change Effects on Glaciers and Ice Sheets" with an Arctic glacier.
Video

Climate Change Effects on Glaciers and Ice Sheets

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The Ross Sea is a 1.9 million square mile (3.6 million square km) stretch of ocean off the coast of Antarctica.
Slideshow

A Trip South to Antarctica’s Ross Sea

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a large iceberg
Video

National Ice Center Monitors the Arctic and Antarctic

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A walrus sits on top of ice.
Article

The Cultural Icescapes of the Arctic

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Two nurse sharks hover over a baited cage
Lesson Plan

Where Have All the Glaciers Gone?

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The Greenland glacier Jakobshavn Isbrae is massive, at around 40 miles long and more than a mile thick.
Article

Up Close and Personal With the Fastest Glacier in the World

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The Greenland glacier Jakobshavn Isbrae is massive, at around 40 miles long and more than a mile thick.
Photo

Jakobshavn Glacier

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A narwhal breaches the surface, its tusk pointed to the sky
Article

Why a Tusk? The real-life unicorns of the sea and the tusks that make them famous

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A summertime channel carries melted ice to the sea. Antarctica and Greenland lose around 350 billion tons of ice each year from such melting.
Photo

Ice Melt at the Poles

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