Massive B-15 Iceberg Blocks McMurdo Shipping, Threatens Penguin Population

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WELLINGTON, New Zealand -- "A remnant of the largest iceberg ever recorded is blocking Antarctica's McMurdo Sound, threatening tens of thousands of penguin chicks with starvation and cutting off a supply route for three science stations, a New Zealand official said Tuesday. The iceberg, known as B15A, measures about 1,200 square miles, said Lou Sanson, chief executive of the government scientific agency Antarctica New Zealand.

He called it "the largest floating thing on the planet right now" and said U.S. researchers estimate it contains enough water to supply Egypt's Nile River complex for 80 years. It is so big it has blocked wind and water currents that break up ice floes in McMurdo Sound during the Antarctic summer, which begins later this month. The U.S. McMurdo Station and New Zealand's Scott Base are located on the sound. Italy's Terra Nova base is nearby.

The iceberg is in the path of four ships due to arrive in Antarctica in a month with fuel and food for the three stations. Scientists are looking into solutions, including breaking an 80-mile path through the ice.

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Tens of thousands of the chicks could starve in coming weeks because the ice build-up in the sound has cut off their parents' access to waters where they catch their fish, Sanson said. Currently there is "more fast (blocked) ice in McMurdo Sound than we've ever recorded in living history for this time of year," Sanson said. The penguins are important to scientists as markers of environmental chance, such as global warming. The iceberg is threatening two of four colonies in the area that scientists have been studying for 25 years. One is on Cape Royds, where 3,000 breeding pairs of Adele penguins now face a 112-mile round trip to bring food to chicks at their nesting grounds. The parents cannot survive such a long journey without eating much of the food they have gathered for their young, Sanson said."

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http://seattlepi.nwsource.com/national/apscience_story.asp?category=1501&slug=Penguin%20Starvation

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