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Ice and Permafrost
10
MEASUREMENT
Snow
ALASKA
8
CANADA
8
LAKES
8
RIVERS
7
*ARCTIC REGIONS
4
ICE REPORTING
4
MAPS
4
TABLES(DATA)
4
*THICKNESS
3
ARCTIC REGIONS
3
Hydrology
3
ICE
3
Limnology and Potamology
3
SEA ICE
3
THICKNESS
3
(*SEA ICE
2
*ICE
2
*NORTH AMERICA
2
*SEA ICE
2
ARCTIC REGIONS)
2
ICE AUGERS
2
NETWORKS
2
OCEANS
2
REMOTE AREAS
2
REPORTS
2
TUNDRA
2
WINTER
2
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