Open Polar Keyword
Antarc*
162
Antarctic
114
Antarctica
82
Arctic
22
Sea ice
19
East Antarctica
14
Svalbard
10
Ice Sheet
9
polar night
8
E. Antarctica
5
South pole
5
Southern Ocean
5
Antarctic Ocean
4
国立極地研究所
4
Ongul Island
3
Bouvet Island
2
East Ongul Island
2
Enderby Land
2
Kiruna
2
National Institute of Polar Research
2
Norwegian Sea
2
Queen Maud Land
2
Ross Island
2
West Antarctica
2
Alaska
1
Amundsen-Scott
1
Antarctic Peninsula
1
Barrow
1
Global warming
1
Greenland
1
Ice Shelf
1
Icebreaker
1
Iceland
1
Longyearbyen
1
Marion Island
1
North Atlantic
1
North Pole
1
Ross Ice Shelf
1
Shirase Glacier
1
Spitsbergen
1
Victoria Land
1