USA Today: A landmark report from the world's top climate scientists this week is likely to say with heightened certainty that humans are behind the planet's rising temperatures, but also that surface temperatures are not the only indicators of climate change.
Senior scientist Kevin Trenberth of the National Center for Atmospheric Research in Boulder, Colo., who was a review editor on the new report, says other signs that bear witness to changes include shrinking Arctic sea ice, melting Greenland ice, warming...