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*SEA ICE
Ice and Permafrost
10
Snow
10
ANTARCTIC REGIONS
5
*ARCTIC REGIONS
4
*ANTARCTIC REGIONS
3
*POLAR REGIONS
3
ARCTIC REGIONS
3
Cartography and Aerial Photography
3
ICE
3
AERIAL RECONNAISSANCE
2
AREA COVERAGE
2
ATMOSPHERIC TEMPERATURE
2
CHARTS
2
DYNAMICS
2
FILES(RECORDS)
2
Meteorology
2
OCEANS
2
PE61102A
2
PROFILES
2
SALINITY
2
SATELLITE IMAGERY
2
SURFACE TEMPERATURE
2
THICKNESS
2
*AERIAL PHOTOGRAPHS
1
*AIR WATER INTERACTIONS
1
*CLIMATE
1
*CLIMATOLOGY
1
*ENVIRONMENTAL IMPACT
1
*Global climate change
1
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