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