Open Polar Keyword
Ice Sheet
10
Methane hydrate
9
Antarc*
8
Sakhalin
7
Antarctic
5
Sea ice
5
Antarctica
4
ice core
3
okhotsk sea
2
permafrost
2
Arctic
1
Arctic Ocean
1
Dronning Maud Land
1
East Antarctica
1
Ice
1
Ket language
1
South pole
1
White-tailed eagle
1
albedo
1
inuits
1
lena river
1
samoyed*
1
wedge*
1
国立極地研究所
1