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Ice and Permafrost
Snow
6
*SEA ICE
3
ARCTIC OCEAN
3
CLIMATE
3
*ARCTIC REGIONS
2
ARCTIC REGIONS
2
CONGRESS
2
CONTINENTAL SHELVES
2
INTERNATIONAL
2
NATIONAL SECURITY
2
NORWAY
2
(*ICE
1
*AIRCRAFT
1
*ARCTIC OCEAN
1
*ATMOSPHERIC BOUNDARY LAYER
1
*BOUNDARY LAYER
1
*ENVIRONMENTAL PROTECTION
1
*GEOCHEMISTRY
1
*GEOSTROPIC WIND
1
*HYDRATES
1
*ICE
1
*MARGINAL ICE ZONES
1
*MARINE ATMOSPHERES
1
*METHANES
1
*NATURAL GAS
1
*OCEAN ENVIRONMENTS
1
*PERMAFROST
1
AERIAL PHOTOGRAPHS
1
AERIAL RECONNAISSANCE
1
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