Crop and crop residue emissions

Crop ammonia emissions Methodology proposed by contractors was rejected by the ad hoc group No methodology available In a dialogue with EMEP (on-going project) Challenge: methodology that is practical and scientifically defendable Dialogue with modellers is part of Work Plan Empirical data available?

Crop residue ammonia emissions N inputs in crop residues are available (UNFCCC reporting) Uncertainty about NH3 emission factors Need a better review of literature? Add to Work Plan