Earth & Environmental Sciences
carbon stock
70%
accumulation rate
68%
permafrost
64%
Holocene
50%
carbon
37%
net ecosystem production
34%
soil
27%
decomposition
17%
ecosystem
14%
lake
14%
tundra soil
12%
climate change
9%
soil horizon
9%
radiocarbon dating
8%
tundra
8%
organic soil
8%
soil profile
7%
primary production
7%
soil surface
7%
warming
6%
nitrogen
4%
atmosphere
4%
climate
4%
loss
4%
rate
2%
Agriculture & Biology
permafrost
100%
carbon sinks
79%
carbon
43%
net ecosystem production
36%
soil
33%
lakes
17%
ecosystems
16%
subarctic soils
13%
degradation
13%
tundra soils
12%
radiocarbon dating
12%
climate change
12%
soil horizons
10%
tundra
9%
primary productivity
8%
organic soils
8%
soil profiles
8%
global warming
7%
nitrogen
4%
Chemical Compounds
Soil
55%
Ecosystem
39%
Carbon Atom
30%
Tundra
22%
Decomposition
10%
Shape
3%
Surface
3%