Table 6. Explanation of Sea Ice Symbology used in Figures 10-21 



icebergs were on plot at the 

 International Ice Patrol. Icebergs 

 on plot at the International Ice 

 Patrol were widely distributed by 

 mid-month and a second two- 

 week ICERECDET was 

 conducted. By month's end, 

 several drifted outside the Ice 

 Patrol area (west of 57°W 

 longitude) and others extended 

 the southernmost limits south of 

 40ON latitude (Figure 27). 



June 1984: As seen in Table 

 5, June was colder than normal 

 and sea ice remained in the 

 westem part of Davis Strait and off 

 the Straits of Belle Isle (Figure 

 1 8). The number of icebergs on 

 plot decreased during June, 

 although the limits of all known ice 

 remained well to the south and 

 east, held there by widely 

 scattered icebergs (Figures 28 

 and 29). The southemmost 

 iceberg on plot for the season 

 came on 6 June at 40O01 "N 

 45°51'W. There were 555 

 icebergs sighted in June, of 

 which 227 drifted south of 48°N 

 and several of these drifted 

 outside the Ice Patrol area (east of 

 39° W or west of 57° W longitude) . 

 At the end of the month, 149 

 were on the International Ice 

 Patrol plot and widely scattered. 



July 1984: Underthe 

 influence of warm but near-normal 

 weather during July, the sea ice 

 retreated north of 54°N by mid- 

 month. Altfxjugh the number of 

 icebergs on plot at the 

 international Ice Patrol decreased 

 throughout the month, the limits 

 of all known ice continued to be 



C = Total Ice concentration In the area In tenths. 



C C C - Concentration of thickest ( C ), 2nd thickest (C), and 3rd thickest (C ). 

 a b c a b c 



S S. S ' Stage of development of thickest (S ),2ndthickest(S^ ),and3rdthJckest(S ). 

 a b c a b c 



~C ' Concentration ol ice within areas of strips and patches. 



F F^F » Roe size of thickest (F ), 2nd thckestfF^), and 3rd thickest (F ). 

 a b c a b c 



Staoe of Devetoorrent 



1^ stage of devekiprnent 



1 New ice 



2 Nllas, ice rind 



3 Young ice 



4 Grey ice 



5 Grey-white ice 



6 First-yearice 



7 Thin first-year ice 



8 Thin first-year Ice, 30-50 cm 



9 Thin first-year Ice, 50-70 cm 

 1' Medium first-year Ice 



4- Thick first-year Ice 



7- Old ice 



8' Second-year Ice 



9' Multi-yearice 



A Icebergs 



• Atraceof IcethlckerthanS 



a 



# Fourth type, If C C,.C do not add up to C 



a b c 



Floe Sizes 



Pancake Ice 



1 Brash, small ice cake 



2 Icecake 



3 Small floe 



4 Medium floe 



5 Big fk)e 



6 Vast fkie 



7 Giant floe 



8 Growlers and floebergs 



9 Icebergs 



/ Undetennined or unknown 



much farther south and east than 

 normal due to widely scattered 

 icebergs at the limits (Figures 30 

 and 31). Of the 975 icebergs 

 sighted and reported to the 

 International Ice Patrol in July, 

 335 passed south of 48°N. Both 

 numbers are greater than those 

 of June, with the increase due to 

 the release of icebergs by the 

 retreating ice pack. 



August 1984: With air 

 temperatures somewhat atjove 

 normal, sea ice continued to 

 retreat in August (Figure 20). 

 Increasing sea surface 

 temperatures accelerated iceberg 

 melt and caused the limits of all 

 known ice to move north (Figures 



32 and 33). Of the 251 icebergs 

 sighted in August, 93 passed 

 south of 48°N and 46 remained 

 on plot at the end of the month. 



September 1984: Sea ice 



continued to retreat rapidly, and 

 by 18 September had 

 disappeared from Davis and 

 Hudson Straits (Figure 21) and 

 completely melted in Baffin Bay to 

 conclude this ice year. By the 

 end of the 1 984 Intemational Ice 

 Patrol season on 7 September, 

 1 24 icebergs had been sighted in 

 September with only 9 drifting 

 south of 48°N and 24 remaining 

 on plot at the end of the season 

 (Figure 34). 



18 



