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Ice and Permafrost
14
MCMURDO SOUND
Snow
(*SEA ICE
8
ANTARCTIC REGIONS)
7
DEEP FREEZE OPERATION
6
THICKNESS
6
ATMOSPHERIC TEMPERATURE
5
FREEZING
5
PERIODIC VARIATIONS
5
POLAR REGIONS
5
ROSS SEA
5
ANTARCTIC REGIONS
4
ICEBREAKERS
4
MELTING
4
METEOROLOGICAL SATELLITES
4
PREDICTIONS
4
SEA ICE)
4
AERIAL RECONNAISSANCE
3
MAPS
3
MARINE TRANSPORTATION
3
ROUGHNESS
3
(*AERIAL RECONNAISSANCE
2
(*WEATHER FORECASTING
2
*SEA ICE
2
DATA PROCESSING
2
DISTRIBUTION
2
DIURNAL VARIATIONS
2
ICE
2
ICE FORECASTING
2
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