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ICE ISLANDS
SEA ICE
Ice and Permafrost
13
Snow
13
Meteorology
11
POLAR REGIONS
8
AERIAL RECONNAISSANCE
7
BIRDS EYE PROJECT
7
FLIGHT PATHS
7
(*ICE
6
COASTAL REGIONS
6
DIURNAL VARIATIONS
6
OBSERVATION AIRCRAFT
6
SEA WATER
6
TERRAIN
6
THICKNESS
6
(*WEATHER FORECASTING
5
ARCTIC OCEAN
5
FREEZING
5
MELTING
5
*ARCTIC OCEAN)
4
ALASKA
4
MARINE METEOROLOGY
4
*ARCTIC OCEAN
3
*ARCTIC REGIONS)
3
*WEATHER FORECASTING
3
ARCTIC REGIONS
3
C-121 AIRCRAFT
3
CLIMATE
3
DISTRIBUTION
3
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