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COASTAL REGIONS
TERRAIN
MARINE METEOROLOGY
5
Meteorology
5
SEA ICE
5
CLIMATE
4
ICE ISLANDS
4
Ice and Permafrost
4
Snow
4
(*ICE
3
(*WEATHER FORECASTING
3
AERIAL RECONNAISSANCE
3
ALASKA
3
BIRDS EYE PROJECT
3
DISTRIBUTION
3
DIURNAL VARIATIONS
3
PHOTOGRAPHIC RECORDING SYSTEMS
3
PLAN POSITION INDICATORS
3
POLAR REGIONS
3
SEA WATER
3
SOURCES
3
ARCTIC OCEAN)
2
ARCTIC REGIONS)
2
ATMOSPHERIC PRECIPITATION
2
GEOLOGY
2
PERMAFROST
2
UNDERWATER SOUND
2
(*ARCTIC OCEAN
1
(*ARCTIC REGIONS
1
(*HYDROLOGY
1
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