Time-lapse proof of extreme ice loss: James Balog on TED.com

"Ninety five percent of the glaciers in the world are retreating or shrinking... there is no scientific dispute about that"


Photographer James Balog shares new image sequences from the Extreme Ice Survey, a network of time-lapse cameras recording glaciers receding at an alarming rate, some of the most vivid evidence yet of climate change. (Recorded at TEDGlobal 2009, July 2009 in Oxford, England. Duration: 19:22)

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America's three "benchmark" glaciers are melting and over the past two decades they have been shrinking at an accelerated rate because of global warming.

The glaciers in Alaska and Washington have undergone a "rapid and sustained" loss of mass since 1989. Scientists at the U.S. Geologic Survey think this "decline could be the result of recent climate changes" overcoming seasonal fluctuations that impact the glaciers' size.

These findings, "Fifty-Year Record of Glacier Change Reveals Shifting Climate in the Pacific Northwest and Alaska, USA", were released in a report by the USGS on Thursday.

The southern-most glacier in the study, South Cascade Glacier in the Cascade Mountains of Washington, has lost almost half of its volume and a quarter of its mass since the USGS began collecting data in 1957.

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