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Ice and Permafrost
14
Snow
14
ALASKA
9
CANADA
8
LAKES
7
THICKNESS
7
ATMOSPHERIC TEMPERATURE
6
RIVERS
6
MEASUREMENT
5
(*SEA ICE
4
Hydrology
4
Limnology and Potamology
4
Meteorology
4
SEA ICE
4
TABLES(DATA)
4
TEMPERATURE
4
(*SNOW
3
ARCTIC REGIONS)
3
DENSITY
3
ICE
3
ICE REPORTING
3
(*ICE
2
(*RIVERS
2
*ARCTIC REGIONS
2
*ICE
2
*ICE)
2
ARCTIC REGIONS
2
CLIMATE)
2
FREEZING
2
GREENLAND
2
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