normal range, said David Ainley of ICEBERGS, ICE CONDITIONS the main U.S. research station in THREATE N ANTARCTIC H. T. Harvey & Associates of San Antarctica, located on Ross Island. PENGUIN COLONIES Jose, California. A smaller colony At this time of year, the ice edge Enormous grounded icebergs and of Adelies at Cape Royds will "fail typically extends between 24 and an unprecedented amount of sea totally" this year, he added. 32 km (15 and 20 miles) north of ice in Antarctica's Ross Sea have Meanwhile, a small colony of the station. Recent storms have re- nearly isolated one of the about 1200 emperor penguins at duced the extent of the ice greatly; continent's most populous Adelie Cape Crozier failed to raise chicks, it now extends 61 km (33 nautical penguin colonies, making it diffi- according to Gerald Kooyman of miles) from McMurdo. cult for the birds to return from the Scripps Institution of Oceanog- The extensive sea ice has in- their feeding grounds in the open raphy. He said the birds probably creased the distance between the abandoned ef- breeding colonies and food sources forts to breed in the open sea. The birds must when the ice- now
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Apr 1, 2002
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