Earth & Environmental Sciences
permafrost
89%
organic carbon
70%
carbon
51%
marine isotope stage
25%
interstadial
25%
lignin
22%
accumulation rate
22%
biomarker
19%
amino acid
19%
organic matter
18%
active layer
16%
index
14%
freezing
12%
degradability
9%
degradation
9%
acid
8%
ecotone
8%
tundra
7%
climate
7%
carbon stock
7%
carbon storage
7%
Postglacial
7%
Last Glacial Maximum
7%
organic soil
7%
transfer function
7%
carbon cycle
6%
sediment
6%
soil organic matter
6%
residence time
6%
environmental change
6%
warming
5%
dating
5%
decomposition
5%
Chemical Compounds
Organic Carbon
100%
Chemical Transformation
57%
Carbon Atom
42%
Organic Matter
30%
Hydroxyproline
28%
Lignin
20%
Biological Marker
19%
Isotope
18%
Tundra
14%
Glycerol
12%
Soil
11%
Muramic Acid
11%
Carbon Cycle
10%
Soil Organic Matter
10%
Acid
9%
Residence Time
7%
Indicator
6%
Mineral
5%