Figure C-7. Iceberg #3 at 2145Z 2 May 1985. Est length 48m. 



Figure C-8. Observed vs. FNCX« wm surface temperature (SST). 



The rise in observed SST between 30 April and 1 May was due to 

 change in location of EVERGREEN 



Iceberg #1 



A large pinnacled iceberg with an 

 initial length and estimated mass 

 of about 1 50m and 800,000 

 metric tons was located in Lilly 

 Canyon in position 44°57N 

 49''03'W along the eastern edge 

 of the Grand Bank on 1 6 April 

 during the first phase of the 

 cruise (Figure C-4). Subsequent 

 position calculations showed that 

 this iceberg was intermittently 

 grounded, neverdrifting rrxjre 

 than about 1 nm from the 

 original sighted position. Poor 

 visibility prevented the collection 

 of size data on 1 6 April. Data on 

 this iceberg were collected 1 7-22 

 April. The model-predicted 

 waterline length matched the 

 observed length fairly closely until 

 the iceberg rolled on 19 April 

 (Figure C-5). 



During the evening of 19 April, 

 the iceberg rolled, increasing the 

 maxirrxjm ot)served waterline 

 from 129m to 157m. Due to 

 continued deterioration on 19 

 April, part of the iceberg rose as it 

 tilted, allowing the iceberg to 

 increase in length again. 

 Although the icet>erg increased 

 in length between 1 7 and 22 

 April, it was obsen/ed to lose 

 approximately 1 5% of its mass 

 during the same period. 

 Throughout the observation 

 period, only a few minor calving 

 events were observed. The 

 average wave height and period 

 were 5 feet and 4 to 5 seconds 

 and the SST averaged 1 .2°C. 



65 



