Several studies have found a non-linear response for GCECD
to N2O concentrations (Hall et al., 2007; Fang et
al., 2010), which would result in large uncertainty for the
quantification of atmospheric N2O when using a singlepoint
calibration with a standard N2O gas, especially for
N2O flux measurements, because the N2O concentration
would accumulate from about 310 ×10−9 mol/mol to
10−6 mol/mol.