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ALASKA
3
CANADA
3
Ice and Permafrost
3
LAKES
3
MEASUREMENT
Snow
3
THICKNESS
*ARCTIC REGIONS
2
ICE REPORTING
2
RIVERS
2
TABLES(DATA)
2
(*SEA ICE
1
*ICE
1
*LAKES
1
*Lake ice
1
*NORTH AMERICA
1
*RIVERS
1
*River ice
1
*SEA ICE
1
*SUBARCTIC REGIONS
1
ARCTIC REGIONS)
1
GREENLAND
1
ICE
1
ICE AUGERS
1
ICE BREAKUP
1
ICE FORMATION
1
Ice breakup
1
MAPS
1
Meteorology
1
POLAR REGIONS
1
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