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Ice and Permafrost
Snow
7
NORTHWEST PASSAGE
6
*ARCTIC REGIONS
5
ARCTIC OCEAN
5
Meteorology
3
Military Operations
3
NORTHERN SEA ROUTE
3
SEA ICE
3
SYMPOSIA
3
Strategy and Tactics
3
*ARCTIC OCEAN
2
*CLIMATE CHANGE
2
*SEA ICE
2
CLIMATE
2
CLIMATE CHANGE
2
DATA ACQUISITION
2
GREENHOUSE EFFECT
2
MARGINAL ICE ZONES
2
MARITIME OPERATIONS
2
MILITARY PLANNING
2
MISSIONS
2
MONITORING
2
NATIONAL SECURITY
2
NAVAL OPERATIONS
2
Physical and Dynamic Oceanography
2
SHIPPING
2
*COAST GUARD
1
*DEPARTMENT OF DEFENSE
1
*GEOPOLITICS
1
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