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FREEZING
TUNDRA
3
ALASKA
2
ICE
2
Ice and Permafrost
2
Snow
2
TERRAIN
2
(*AERIAL PHOTOGRAPHY
1
(*IONS
1
(*PERMAFROST
1
*ARCTIC REGIONS)
1
*BEAUFORT SEA
1
*COASTAL REGIONS
1
*PERMAFROST
1
*REMOTE SENSING
1
AERIAL PHOTOGRAPHS
1
ALASKA)
1
ATMOSPHERIC TEMPERATURE
1
BARROW(ALASKA)
1
CLAY MINERALS
1
CLOUD COVER
1
CONCENTRATION(CHEMISTRY))
1
CRACKS
1
DEGRADATION
1
DEPOSITS
1
DETECTION
1
EROSION
1
GRAVEL
1
INFRARED IMAGES
1
ISLANDS
1
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