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View Resource Earthwatch Radio: Vanishing Act in the Arctic

This radio broadcast features an expert in the study of the Arctic climate who has analyzed more than 20 years of satellite images that show the steady shrinking of the reflective ice cover of the Arctic Ocean. He points out that the disappearing ice cover is highly reflective and is being replaced by dark-colored ocean that absorbs more heat, and that the melting is accelerating. He also warns...

View Resource An Evolving Climate Picture

This radio broadcast discusses how scientists' views of global warming have changed since the subject first emerged some 20 years ago. Topics include the nature of the warming process, once thought to be a gradual ratcheting-up, but now considered to be more unpredictable; the development of more powerful computers and more sophisticated modeling programs; the complex nature of the atmosphere,...

View Resource Coral Calamity

This radio broadcast discusses a study of coral reefs near Belize, which has revealed that they are dying from emergent diseases connected with water pollution and global warming. A marine scientist who led the study points out that these problems appeared only in the last 20 or 30 years. The clip is 2 minutes in length.

View Resource Tolerance in the Tropics

Although temperatures are predicted to rise the most in northern latitudes due to global warming, tropical plants and animals might have the most difficult time adapting to climate change. This radio broadcast explains how temperature varies by only a couple of degrees annually in the tropics, and organisms there have a narrow range of temperature tolerance. The clip is 2 minutes in length and is...

View Resource Arctic Meltdown

In 1996, US entrepreneur and explorer Gary Comer took his small boat through the Northwest Passage in 19 days, a route that had once been ice, but was now easily navigated open water. This radio broadcast weighs up the extent and implications of the imminent Arctic ice breakup. The broadcast discusses the Historical Limit line in Greenland, which denotes glacier recession; Inuit observations of...

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