Earth & Environmental Sciences
permafrost
100%
tundra
80%
soil
80%
warming
50%
ecosystem
42%
snow
39%
wetland
36%
methane
32%
carbon
31%
active layer
27%
thawing
27%
Arctic ecosystem
26%
shrub
26%
respiration
26%
organic carbon
25%
winter
25%
turnover
24%
vegetation
22%
incubation
22%
temperature
21%
oxidation
20%
phenology
20%
sediment
20%
nitrate
19%
rate
19%
litter
19%
in situ
18%
summer
18%
growing season
18%
budget
18%
soil carbon
18%
decomposition
17%
soil organic matter
17%
nitrogen
16%
diffusivity
16%
valley
16%
climate
15%
soil gas
15%
carbon stock
15%
mesocosm
15%
greenhouse gas
15%
Agriculture & Biology
permafrost
55%
tundra
51%
Arctic region
45%
soil
41%
Greenland
39%
ecosystems
30%
soil organic carbon
27%
nitrous oxide
25%
methane
24%
wetlands
22%
snow
20%
soil carbon
18%
carbon
17%
carbon sinks
17%
frigid soils
16%
shrubs
16%
Denmark
16%
soil organic matter
15%
