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POLAR REGIONS
THICKNESS
Ice and Permafrost
9
Snow
9
ANTARCTIC REGIONS)
5
ATMOSPHERIC TEMPERATURE
5
FREEZING
5
ICE
4
(*SEA ICE
3
*SEA ICE
3
ANTARCTIC REGIONS
3
ICEBREAKERS
3
MCMURDO SOUND
3
PERIODIC VARIATIONS
3
SURFACE TEMPERATURE
3
(*SNOW
2
*ICE FORMATION
2
COLD WEATHER TESTS
2
DEEP FREEZE OPERATION
2
ECHO RANGING
2
GLACIERS
2
LOADS(FORCES)
2
SEA ICE)
2
SEA WATER
2
(*AERIAL RECONNAISSANCE
1
(*ICE
1
(*RUNWAYS
1
(*STRUCTURAL GEOLOGY
1
*AIR WATER INTERACTIONS
1
*HEAT SINKS
1
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