Word: greenlands
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Some entirely new observations have been recorded as well. In its 2007 report, the IPCC did not include the impact of Greenland's or Antarctica's melting glaciers in its estimate of future sea-level rise, saying it lacked sufficient data. But now the speed-up of flow from these glaciers has been documented. And while the IPCC noted in 2007 that every continent had warmed throughout the 20th century except Antarctica, that continent has now been shown to be warming as well - very likely due to man-made influences, says Hegerl. (See the top 10 scientific discoveries...
...much as 130 meters lower than they are today (all that extra water is locked up in ice). During interglacial periods - we are enjoying one now, East Coast blizzards notwithstanding - the ice sheets retreat, the glaciers melt and sea level rises. The expansive but quickly melting ice sheets of Greenland, the North Pole and Antarctica are all that is left of our last glacial period, which reached its peak about 20,000 years...
...biggest gaps in climate science is our understanding of how the major ice sheets of Greenland and Antarctica will respond to warming temperatures. The science is so foggy that the Intergovernmental Panel on Climate Change - which recently came under attack for hyping the impacts of global warming - has refrained from estimating how fast those ice sheets could melt and contribute to sea level rise. Dorale's paper suggests the possibility that ice sheets may respond much more dynamically to changes in temperature, forming and melting at rates that are quicker than previously thought. "There might be a feedback with regards...
...including winds and local currents that push water consistently toward or away from a particular shore. "One of the biggest effects," says the study's lead author, Robert Kopp, who did his research during a postdoctoral fellowship at Princeton, "is gravity." The world's giant ice sheets, such as Greenland's, are so massive that they actually pull the oceans toward them, raising sea level in the surrounding region. "If you were in Scotland, and Greenland started melting," he says, "local sea level would actually fall at first...
...estimated 800 marathons are now held around the world each year; 20 of them with 10,000 or more finishers. They include such punishing races as the Great Tibetan Marathon, held at 12,500 ft. above sea level; the Polar Circle Marathon, held on Greenland's ice cap; and the Pikes Peak marathon, which includes a 6,000-ft. climb to the summit of the Colorado mountain. Record times have fallen from close to three hours a century ago to close to two hours today, with Ethiopian Haile Gebrselassie setting the current record in Berlin last year with a time...