Abstract
It was big news when the amount of Arctic sea ice reached a record low this summer (Science, 5 October, p. 33). At the Arctic Report Card 2007 Web site, pole watchers can track other environmental changes in the far north. The new site, from the U.S. National Oceanic and Atmospheric Administration, updates last year's State of the Arctic report by offering brief, peer-reviewed articles on variables such as air temperature and the mass of Greenland's ice sheet. As one entry reveals, a “hot spot” where temperatures are 3° to 4°C above average has edged closer to Europe from its previous position in eastern Siberia. Overall, the Arctic continues to heat up, but the site notes that not all measures follow the trend. For instance, permafrost temperatures appear to be leveling off.
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