saturation index
Damköhler number
Dimensionless number comparing transport timescale to reaction timescale, used to determine whether transport or reaction processes dominate
Nominal oxidation state of carbon (NOSC)
Schmidt number
2nd order feedback strength
Asian Pb fraction
GC_s
Kd values
SUVA
[Re]/[Na+]* ratios
carbon loss rate per degree per year
dissolved Re yield
feedback strength
Quantitative measure of the sensitivity of weathering rates to changes in atmospheric CO2, characterized by 1st and 2nd order components
fluorescence index
fraction of modern standard
functional group abundance
Quantitative measurement of the relative amounts of different organic functional groups (carbonyl, aliphatic, amide, quinonic, aromatic, phenolic, polysaccharide) in soil organic matter
nominal oxidation state of carbon
A measure directly related to the amount of energy required for microbial oxidation of a given compound, with higher NOSC values correlating to lower ΔGox and greater energy yield
reaeration coefficient
transit time
The elapsed time carbon atoms spend in the soil, characterizing the age structure of output flux from the soil
turnover time
The average time required for dead wood to decompose, calculated as the inverse of the decay rate constant