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CONTINENT >
GEOGRAPHIC REGION >
7
POLAR
7
oceans
7
ANTARCTICA
6
EARTH SCIENCE
6
OCEAN >
6
SOUTHERN OCEAN
6
ICE EXTENT
5
SATELLITES
5
SEA ICE
5
AMD
4
AMD/AU
4
ANIMALS/VERTEBRATES
4
BIOLOGICAL CLASSIFICATION
4
CEOS
4
CRYOSPHERE
4
biota
4
ACE/CRC
3
DMSP >
3
Defense Meteorological Satellite Program
3
EARTH SCIENCE >
3
GLACIERS/ICE SHEETS
3
ICE SHELF
3
ICE SHELF STRAIN
3
ICEBERGS
3
MODELS
3
Nimbus-7
3
SEA ICE CONCENTRATION
3
SIGNIFICANT WAVE HEIGHT
3
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Antarc*
7
Antarctic
7
Antarctic Peninsula
7
Iceberg*
Antarctica
6
Sea ice
6
Southern Ocean
6
Ice Sheet
5
Ice Shelf
5
Ice Shelves
5
Adelie Land
2
Adelie penguin
2
Aptenodytes forsteri
2
British Antarctic Survey
2
East Antarctica
2
Emperor penguins
2
IPY
2
International Polar Year
2
Mertz Glacier
2
National Snow and Ice Data Center
2
Ocean acidification
2
Weddell Seal
2
ice pack
2
Antarctic Ocean
1
aurora australis
1
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