Thompson has witnessed our current warming first-hand. Since 1978, he has snapped near-yearly terrestrial photographs of the cap’s largest outlet glacier, Qori Kalis. (Click here to watch Qori Kalis melt.) During each expedition, he spots more bedrock that has been exposed and lakes swelling or appearing out of nowhere. He sees newly freed boulders perched on crests of gravelly moraines, the piles of rocky debris left behind by the retreating wall of ice. The soundtrack to every trip is the constant drip, splash, trickle, and rush as ice turns quickly into water.U.S. Electricity Net Generation — Fossil Fuels (via):
From his data, Thompson has determined that 20 percent of the ice he measured at Qori Kalis and Quelccaya as a whole in 1978 has since melted. “In the first measurement period, which was from the first aerial photographs of 1963 until our photographs in 1978, the terminus of Qori Kalis was retreating at a rate of about 4.7 meters per year,” he says. “From about 2000 to 2002, that rate had increased to over 200 meters per year, or over 40 times faster.”
1978 ... 1,646.2 billion kilowatt-hoursSo are we ready to turn off the lights (and these computers) yet?
2004 ... 2,687.4 billion kilowatt-hours
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posted by keswick at 2:02 PM on March 5, 2006