knuth, et. al june 8, 2004 iceberg annual meeting antarctic icebergs – 2003-2004 status report...
DESCRIPTION
Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – Status Report Antarctic Icebergs Calving of major icebergs in the past – C-19 and B-15 in Ross Sea largest in recent years C-19 left Ross Sea this year; B-15A split Weddell Sea icebergs regularly monitored Larsen Ice Shelf Icebergs also now regularly monitored New Ross Sea iceberg – B-26TRANSCRIPT
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Antarctic Icebergs – 2003-2004 Status Report
Shelley Knuth, Douglas MacAyeal, Jonathan Thom, and Linda Keller
University of Wisconsin-MadisonUniversity of Chicago
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Outline
• Introduction• Ross Sea Icebergs• Weddell Sea Icebergs• Larsen Ice Shelf Icebergs• Current Status• Future Movements?
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Antarctic Icebergs
• Calving of major icebergs in the past – C-19 and B-15 in Ross Sea largest in recent years
• C-19 left Ross Sea this year; B-15A split• Weddell Sea icebergs regularly monitored• Larsen Ice Shelf Icebergs also now regularly
monitored• New Ross Sea iceberg – B-26
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
July 8, 2003 – Ross SeaIn July 2003, there were six icebergslocated in and near the Ross Sea. C-19 and it’s “children” were movingout of the Ross Sea toward the icebergGraveyard (near Mertz Glacier)
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
July 18, 2003 – Ross SeaAt this time, the C-19 bergs remain off the coast of Victoria Land, approaching the iceberg graveyard. Sea ice is present in the Ross Sea near McMurdo Sound. The first hint of a crack can be seen in B-15A, where B-15J will eventually form.
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
July 24, 2003 – Ross SeaThe increase of sea ice between B-15A and the Drygalski Ice Tongue becomes more apparent through July.
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
August 21, 2003 – Ross SeaAnother image of the growing sea ice. Also, can clearly see B-15A beginning to shift apart as B-15J forms.
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
August 22, 2003 - Ross Sea
Sea ice continues to build in the Ross Sea. A major ice floe broke up near the Borchgrevink Coast.
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
September 10, 2003 – Ross SeaB-15A pulls out from the edge of the Ross Ice Shelf
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
September 17, 2003 – Ross SeaOne of the last images of C-19 – also, B-15A has moved back towards ice shelf
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
October 9, 2003 – Ross SeaB-15A finally breaks up!
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
October 21, 2003 – Ross SeaAnother image of the formation of B-15J, two weeks later
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
November 14, 2003 – Ross SeaBeginnings of B-15K split. Also, distance increases between B-15A and B-15J
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
November 21, 2003 – Ross Sea
B-15J begins to turn
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
December 8, 2003 – Ross SeaB-15J slides along the ice shelf. Also, sea ice has cleared out of the area greatly.
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
December 15, 2003 – Ross Sea
B-15A cracks to form B-15K
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
January 22, 2004 – Ross SeaThe new iceberg, B-15K
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
March 16, 2004 – Ross SeaView of new iceberg B-26
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
April 5, 2004 – Ross Sea
Clear view of all icebergs – note B-15J’s position
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
May 5, 2004 – Ross SeaB-26 is pulling away from the ice shelf. Also, sea ice is building up.
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
May 20, 2004 – Ross SeaAfter storm, sea ice is blown outand B-15J has rotated
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
May 24, 2004 – Ross Sea
B-15J has slipped south of Franklin Island
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
June 4, 2004 – Ross SeaMost recent image showing B-15A is starting to shift further south and east
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
July 20, 2003 – Weddell Sea
A-22A only mover over past year
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Nov. 1, 2003 – Weddell Sea
After storm, A-22A is closer to ice shelf
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Nov. 28, 2003 – Weddell Sea
Clearer view of A-22A’s new position
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Dec. 29, 2003 – Weddell Sea
A-22A is now against the ice shelf
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
April 28, 2004 – Weddell Sea
Not much change until now – possible new iceberg?
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
August 31, 2003 - Larsen
Initial ice shelf view – few scattered pieces
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
October 16, 2004 - LarsenNew view of ice shelf
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
December 4, 2003 - Larsen
Large piece now against ice shelf
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
May 9, 2004 - Larsen
Larsen Ice Shelf icebergs mostly remain the same
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Current Status
• Larsen Ice Shelf icebergs remain near ice shelf – not much change
• Monitor A-22A for possible breakoffs• B-15A undergoing major movements• B-15J also rotating
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Future Movements
• B-15A might move between Franklin Island and shallow areas
• Or could continue eastward along ice shelf• B-15J could also continue rotating eastward• Not really sure
June 8, 2004Iceberg Annual Meeting
Antarctic Icebergs – 2003-2004 Status Report
Knuth, et. al
Image courtesy of Kelly Brunt