Open Polar Keyword
Subarctic
5
Ice Sheet
3
Sakhalin
3
okhotsk sea
3
Kamchatka
2
Sea ice
2
Ursus arctos
2
Yukon
2
glacier
2
permafrost
2
Alaska
1
Antarc*
1
Antarctic
1
Antarctica
1
Arctic
1
Bering Sea
1
Greenland
1
Iceland
1
Phytoplankton
1
Puffinus tenuirostris
1
Siberia
1
Tundra
1
Yukon river
1
glacier*
1
ice core
1
taiga
1
toothed whales
1
国立極地研究所
1