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FREEZING
GREENLAND SEA
Ice and Permafrost
12
Snow
12
MELTING
11
(*AERIAL RECONNAISSANCE
10
(*SEA ICE
10
SEA ICE)
10
ICE ISLANDS
8
OBSERVATION AIRCRAFT
8
ARCTIC OCEAN)
7
SEA WATER
7
FLIGHT PATHS
6
THICKNESS
5
WEATHER FORECASTING
5
DENMARK
4
METEOROLOGICAL RADAR
4
Physical and Dynamic Oceanography
4
STRAITS
4
ALASKA
3
ARCTIC OCEAN
3
ARCTIC REGIONS
3
C-121 AIRCRAFT
3
DATA ACQUISITION
3
DATA PROCESSING
3
Meteorology
3
NAVAL AIRCRAFT
3
AERIAL PHOTOGRAPHS
2
ARCTIC REGIONS)
2
BAFFIN ISLAND
2
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Arctic
12
Arctic Ocean
Greenland
12
Greenland Sea
12
Ice
12
Sea ice
permafrost
12
Arctic Basin
9
Denmark Strait
6
Alaska
4
Baffin
4
Baffin Bay
4
Banks Island
4
Canadian Archipelago
4
Parry Channel
4
ice pack
4
Iceland
3
North Pole
3
Baffin Island
2
Barents Sea
2
Chukchi
2
Chukchi Sea
2
Archipelago
1
East Greenland
1
Franz Josef Land
1
Iceberg*
1
Lincoln Sea
1
Robeson channel
1
Wrangel Island
1
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