"From the Arctic sea ice to the Antarctic interior and the mountainous peaks of Peru, Alaska, and Tibet, ice is melting at an alarming rate. The accelerating loss of ice sheets, sea ice, and glaciers is one of the most powerful and striking indicators of a warming climate," says Alexandra Giese, Staff Researcher of the Earth Policy Institute, in a recent release, "Ice Melting Faster Everywhere" "The most notable ice loss in recent years has been the shrinking of sea ice in the Arctic Ocean."

From the beginning of the satellite record in 1979 through 1996, ice area decreased at a steady rate of 3 percent per decade in response to rising temperature. In the following decade, ice area decreased by 11 percent, reaching a dramatic minimum in 2007. In September of that year, sea ice occupied only 3.6 million square kilometers, an area 27 percent smaller than the previous record low (in 2005) and 38 percent smaller than the 1979—2007 average. Summer sea ice coverage has increased slightly in the last two years, but it is still far below the long-term average.

The glaciers in the Himalayas and on the Tibetan plateau make up the largest body of ice outside the poles and provide water to Asia's major river systems, which supply water to over 2 billion people. This water is vital for drinking and for irrigating the wheat and rice crops in China and India, the largest in the world. In recent years, Himalayan glaciers have been retreating at rates ranging from 10 to 60 meters per year. As the glaciers disappear, the dry-season flows of river systems that depend on them may decrease by up to 70 percent, making them seasonal rivers. River systems at risk include the Yangtze, Yellow, Indus, Ganges, and Brahmaputra.

The Andes, home to 90 percent of the world's tropical glaciers, are also experiencing rapid melt and a shrinking water supply: between the early 1970s and 2006, Peruvian and Bolivian glaciers lost about one third of their surface area. In Peru, glacier and snow melt provides 80 percent of the fresh water, used not only for drinking but also for hydroelectricity, which supplies more than 80 percent of the country's power. In neighboring Bolivia, the La Paz governor is already anticipating severe water shortages and considering a program for migration out of the capital city. The 18,000-year-old Chacaltaya glacier, home of the country's only ski resort, disappeared in 2009.

The glaciers of Tanzania's Mount Kilimanjaro, long cultural and spiritual icons, decreased in area by 84 percent between 1912 and 2007 and continue to melt rapidly. In Alaska, 98 percent of glaciers are currently thinning or retreating. And accelerated melting puts Montana's Glacier National Park on track to lose its namesakes by 2020.

These current ice loss trends are alarming, but perhaps more disconcerting is the fact that ice melt is occurring even faster than scientific models have predicted, emphasizing the need to cut emissions before the world sees ice sheet collapse, catastrophic inundation of low-lying coastal areas, and widespread water and food shortages. After all, in the words of Stockholm University professor Johan Rockström, "We don't know how to refreeze the Greenland ice sheet."

For full report please visit www.earthpolicy.org/index.php?/indicators/C50/ice_melting_2009

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