Open Polar Keyword
Antarc*
820
Antarctic
641
国立極地研究所
439
Memoirs of National Institute of Polar Research
419
Polar Research
419
Antarctica
337
National Institute of Polar Research
128
Sea ice
112
Ice Sheet
82
Polar meteorology and glaciology
81
Arctic
60
Polar Biology
56
Proceedings of the NIPR Symposium on Polar Biology
56
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
56
Ongul Island
50
East Antarctica
41
Polar Science
41
Prince Olav Coast
36
East Ongul Island
35
ice core
35
Polar geoscience
31
Icebreaker
30
Polar bioscience
24
Enderby Land
23
Adelie penguin
22
Southern Ocean
22
Antarctic Ocean
20
South pole
19
Dronning Maud Land
16
Victoria Land
16
Queen Maud Land
15
Ross Island
15
Svalbard
15
Iceland
14
Greenland
11
aurora australis
11
Amundsen Bay
10
polar night
10
McMurdo Sound
9
Arctic Ocean
8
E. Antarctica
8
Antarctic Peninsula
6
International Polar Year
6
Ross Sea
6
Tonagh Island
6
Alaska
5
IPY
5
Ny Ålesund
5
Ny-Ålesund
5
SCAR
5
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