G. CH₄ Emissions from Rice Production

The IPCC method for estimating methane emissions from rice production is based on the use of annual statistics for harvested areas and area-based seasonally integrated emission factors. In its most simple form, the IPCC method can be implemented using national activity data (i.e., national total area harvested) and a single emission factor.

The IPCC method can be modified to account for the variability in growing conditions by disaggregating national total harvested area into smaller area-units (e.g., harvested areas under different water management regimes) and multiplying the harvested area for each area-unit by an emission factor that is representative of the prevailing conditions at this area-unit.