According to the methodology recommended by the IPCC (2000) for quantifying uncertainties (Eqs. (9.1) and (9.2)), the uncertainties in emission factor were estimated to be 28.0 and 29.5% for the models F-D-F and F-D-F-M, respectively. The uncertainty in seasonal total nitrogen input was estimated to be 22.2 and 24.3% in the 1980s and 1990s, respectively. Eventually, their combined total uncertainties in seasonal N2O estimate were estimated to be 36.2% in the 1980s and 37.5% in the 1990s.
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