Extended Data Table 1 Equations forming the basis of the two-box model used to calculate marine and terrestrial N2O emissions
From: Isotopic constraints on marine and terrestrial N2O emissions during the last deglaciation
- Parameters (see also Extended Data Table 2): Matm, the total mass of the atmosphere; χstrat, the stratospheric fraction of the total atmosphere;
and 
, the masses of N2O in the troposphere and stratosphere; Focean and Fland, the marine and terrestrial N2O emissions; Extrop,strat, the rate of exchange of air between troposphere and stratosphere; [N2O]trop and [N2O]strat, the N2O mass concentrations in the troposphere and stratosphere; Fsink, the rate of removal of N2O from the stratosphere; 
, the atmospheric lifetime of N2O in equilibrium; kstrat, the stratospheric lifetime of N2O; f and 1 − f, the marine and terrestrial fractions of total N2O emissions; ε, the fractionation constant of the stratospheric sink as defined in ref. 64; Rtrop and Rstrat, the isotopic ratios in the troposphere and in the stratosphere; Rocean and Rland, the isotopic ratios of marine and terrestrial emissions.
and 
, the masses of N2O in the troposphere and stratosphere; Focean and Fland, the marine and terrestrial N2O emissions; Extrop,strat, the rate of exchange of air between troposphere and stratosphere; [N2O]trop and [N2O]strat, the N2O mass concentrations in the troposphere and stratosphere; Fsink, the rate of removal of N2O from the stratosphere; 
, the atmospheric lifetime of N2O in equilibrium; kstrat, the stratospheric lifetime of N2O; f and 1 − f, the marine and terrestrial fractions of total N2O emissions; ε, the fractionation constant of the stratospheric sink as defined in ref. 