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CANADA
4
GREENLAND SEA
Ice and Permafrost
4
Snow
4
(*SEA ICE
3
ARCTIC OCEAN)
3
(*AERIAL RECONNAISSANCE
2
C-121 AIRCRAFT
2
CRACKS
2
DIURNAL VARIATIONS
2
FREEZING
2
MELTING
2
SEA ICE)
2
SEA WATER
2
STRAITS
2
WEATHER FORECASTING
2
(*ICE ISLANDS
1
*ARCTIC REGIONS
1
*SEA ICE
1
*SOUND TRANSMISSION
1
*UNDERWATER SOUND
1
ACOUSTIC REFLECTION
1
ACOUSTIC SCATTERING
1
ACOUSTIC WAVES
1
AERIAL PHOTOGRAPHS
1
ARCHIPELAGOES
1
ARCTIC REGIONS
1
ATMOSPHERIC MOTION
1
Acoustics
1
BACKSCATTERING
1
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Arctic
4
Greenland
Greenland Sea
Ice
4
Sea ice
permafrost
4
Arctic Basin
3
Arctic Ocean
3
Arctic Archipelago
2
Baffin
2
Baffin Bay
2
Banks Island
2
Canadian Archipelago
2
North Pole
2
Parry Channel
2
Baffin Island
1
Beaufort Sea
1
Bering Sea
1
Canadian Arctic Archipelago
1
Denmark Strait
1
Lincoln Sea
1
Robeson channel
1
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