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Sci / Health / Environment

Environment April 20 '05 Iceberg B15

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#1 of 2

     Posted 4/21/05 1:33 AM   
Sue_N
 
From  Sue_N  Posts 3452  Last 12:11 AM
To  All      [Msg # 195167.1 ]    

Would you have liked to be there when the iceberg hit the glacier?

Iceberg B15

The letter B is given to icebergs originating in the Antarctic quadrant from 90W to 180 (Pacific sector). Each iceberg over 10 nautical miles long (about 18.5 km) that breaks off is given the next number in sequence. Iceberg B15 broke off of the Ross Ice Shelf in March 2000. At that time it was 23 miles (37km) across and 183 miles (295km) long (total area 4,179 square miles (6.274 km)), and 100 feet (30.5m) tall. As only the top one tenth of icebergs tends to be above water, there would have been 900 feet (274m) hanging below the waterline.

As pieces break off from icebergs, they get an additional letter, starting with A. B15 broke in two on October 9 2003, and the largest part, called B15A, stayed put. There have been at least 10 pieces break off of B15, the last being B15J on November 02 2003. B15A blocked McMurdo Sound until November 2004. This interfered with supply ships for the stations, and blocked the route between the emperor penguin colony at Cape Crozier and the sea, wreaking havoc to the breeding season. B15A then started drifting towards the Drygalski ice tongue, but stopped 4.5km in January 2005, having snagged on a submerged volcano underwater in the Ross Sea. The Drygalski ice tongue is part of a glacier that floats out over the Ross Sea.

B15A began moving again in early April. For the next event in the saga read on...

Giant Antarctic Iceberg Hits Ice Glacier

B15A is the world's biggest iceberg, the calf of an even bigger one which broke off of the Ross Ice Shelf, B15. B15A had blocked part of McMurdo Sound until earlier this month, making supply runs to some bases difficult and causing major problems for penguins with young. B15A knocked a 3 miles square block off of the tip of the Drygalski Ice Tongue.

Please see the following message for the remaining stories.

Sue [sysop in NewsForum and World Issues forum]
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#2 of 2

     Posted 4/21/05 1:35 AM   
Sue_N
 
From  Sue_N  Posts 3452  Last 12:11 AM
To  All      [Msg # 195167.2 Message 195167.2 replying to 195167.1 195167.1 ]    

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In contrast, the south may experience flooding because of El Nino.

N.M. Reaches Water Rights Settlement

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Senate Judiciary Committee Chairm
...[Message truncated]

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Sci / Health / Environment

Environment April 20 '05 Iceberg B15

  
 
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