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Ice and Permafrost
SEASONAL VARIATIONS
Snow
13
*SEA ICE
12
ANTARCTIC REGIONS
7
CHARTS
7
*ANTARCTIC REGIONS
4
ICE
4
ICEBERGS
3
IMAGES
3
SATELLITE PHOTOGRAPHY
3
*PACK ICE
2
AREA COVERAGE
2
CLIMATE
2
COMPARISON
2
CONCENTRATION(COMPOSITION)
2
GEOGRAPHIC DISTRIBUTION
2
HEAT TRANSFER
2
Ice free areas
2
MELTING
2
Meteorology
2
POLAR REGIONS
2
Physical and Dynamic Oceanography
2
REMOTE SENSING
2
SALINITY
2
TEMPERATURE
2
THICKNESS
2
*ARCTIC REGIONS
1
*GLACIOLOGY
1
*LAND ICE
1
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