Open Polar Keyword
Antarc*
Antarctic
22
国立極地研究所
National Institute of Polar Research
18
Sea ice
9
Antarctic Ocean
5
Antarctica
4
aurora australis
4
Southern Ocean
3
IPY
2
Ice Sheet
2
International Polar Year
2
Arctic
1
Dronning Maud Land
1
East Antarctica
1
Enderby Land
1
Icebreaker
1
Tonagh Island
1
ice algae
1
okhotsk sea
1
polar night
1