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ALASKA
5
CANADA
5
Ice and Permafrost
5
LAKES
5
MEASUREMENT
Snow
RIVERS
4
TABLES(DATA)
4
ICE REPORTING
3
THICKNESS
3
(*SEA ICE
2
*ARCTIC REGIONS
2
ARCTIC REGIONS)
2
ICE AUGERS
2
MAPS
2
SEA ICE
2
(*ARCTIC REGIONS
1
(*ICE
1
*ICE
1
*LAKES
1
*Lake ice
1
*NORTH AMERICA
1
*RIVERS
1
*River ice
1
*SEA ICE
1
*SUBARCTIC REGIONS
1
GREENLAND
1
Hydrology
1
ICE
1
ICE BREAKUP
1
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