1. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report Shelley Knuth, Douglas MacAyeal, Jonathan Thom, and Linda Keller University of Wisconsin-Madison University of Chicago

2. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report Outline Introduction Ross Sea Icebergs Weddell Sea Icebergs Larsen Ice Shelf Icebergs Current Status Future Movements?

3. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 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-26

4. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report July 8, 2003 – Ross Sea In July 2003, there were six icebergs located in and near the Ross Sea. C-19 and it’s “children” were moving out of the Ross Sea toward the iceberg Graveyard (near Mertz Glacier)

5. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report July 18, 2003 – Ross Sea At 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.

6. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report

7. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report July 24, 2003 – Ross Sea The increase of sea ice between B-15A and the Drygalski Ice Tongue becomes more apparent through July.

8. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report August 21, 2003 – Ross Sea Another image of the growing sea ice. Also, can clearly see B-15A beginning to shift apart as B-15J forms.

9. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report

10. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report August 22, 2003 - Ross Sea Sea ice continues to build in the Ross Sea. A major ice floe broke up near the Borchgrevink Coast.

11. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report September 10, 2003 – Ross Sea B-15A pulls out from the edge of the Ross Ice Shelf

12. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report September 17, 2003 – Ross Sea One of the last images of C-19 – also, B-15A has moved back towards ice shelf

13. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report October 9, 2003 – Ross Sea B-15A finally breaks up!

14. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report October 21, 2003 – Ross Sea Another image of the formation of B-15J, two weeks later

15. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report November 14, 2003 – Ross Sea Beginnings of B-15K split. Also, distance increases between B-15A and B-15J

16. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report

17. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report November 21, 2003 – Ross Sea B-15J begins to turn

18. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report December 8, 2003 – Ross Sea B-15J slides along the ice shelf. Also, sea ice has cleared out of the area greatly.

19. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report December 15, 2003 – Ross Sea B-15A cracks to form B-15K

20. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report January 22, 2004 – Ross Sea The new iceberg, B-15K

21. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report March 16, 2004 – Ross Sea View of new iceberg B-26

22. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report April 5, 2004 – Ross Sea Clear view of all icebergs – note B-15J’s position

23. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report May 5, 2004 – Ross Sea B-26 is pulling away from the ice shelf. Also, sea ice is building up.

24. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report May 20, 2004 – Ross Sea After storm, sea ice is blown out and B-15J has rotated

25. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report May 24, 2004 – Ross Sea B-15J has slipped south of Franklin Island

26. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report June 4, 2004 – Ross Sea Most recent image showing B-15A is starting to shift further south and east

27. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report July 20, 2003 – Weddell Sea A-22A only mover over past year

28. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report Nov. 1, 2003 – Weddell Sea After storm, A-22A is closer to ice shelf

29. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report Nov. 28, 2003 – Weddell Sea Clearer view of A-22A’s new position

30. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report Dec. 29, 2003 – Weddell Sea A-22A is now against the ice shelf

31. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report April 28, 2004 – Weddell Sea Not much change until now – possible new iceberg?

32. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report August 31, 2003 - Larsen Initial ice shelf view – few scattered pieces

33. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report October 16, 2004 - Larsen New view of ice shelf

34. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report December 4, 2003 - Larsen Large piece now against ice shelf

35. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report May 9, 2004 - Larsen Larsen Ice Shelf icebergs mostly remain the same

36. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report 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

37. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report 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

38. Knuth, et. al June 8, 2004 Iceberg Annual Meeting Antarctic Icebergs – 2003-2004 Status Report Image courtesy of Kelly Brunt