Physics & Astronomy
tundra
98%
permafrost
80%
ecosystems
67%
winter
24%
productivity
23%
aerial photography
18%
subsidence
16%
climate change
15%
respiration
11%
polar regions
11%
sinks
10%
soils
10%
ice
9%
chambers
7%
atmospheres
6%
heating
6%
Agriculture & Biology
permafrost
73%
tundra
62%
ecosystems
36%
gross primary productivity
29%
ecosystem respiration
15%
subsidence
15%
aerial photography
14%
winter
12%
ice
9%
climate change
8%
soil
4%
Earth & Environmental Sciences
thermokarst
67%
tundra
52%
permafrost
47%
ecosystem
28%
productivity
9%
winter
8%
aerial photography
7%
respiration
6%
subsidence
5%
warming
5%
ice
4%
atmosphere
4%
climate change
4%
soil
2%
Engineering & Materials Science
Permafrost
69%
Ecosystems
51%
Aerial photography
15%
Productivity
15%
Subsidence
12%
Climate change
10%
Ice
9%
Soils
7%
Chemical Compounds
Tundra
100%
Ecosystem
57%
Soil
13%
Amount
6%