Emission factors

• Crippa et al., 2018: Gridded emissions of air pollutants for the period1970–2012 within EDGAR v4.3.2

The emission factors used in EDGAR are mainly based on the EMEP/EEA (2013) guidebook and partly on the latest available scientific knowledge (EMEP/EEA, 2016; see guidebook). When information on EFs is missing or very uncertain (e.g. for Africancountries), default emission factors are considered to keep the consistency and comparability of the emissions among countries.

The uncertainty of NH3 is the largest among all pollutants because of the high uncertainty of both agricultural statistics and emission factors (range of variation in 2012: 186 % and 294.4 %).

world median	2.4E-01
EU28 median	1.3E-01
USA	1.6E-01
China	8.3E-02
India	4.8E-01
Russia	8.0E-02
Japan	5.4E-04

Implied EFs for agricultural sector for selected regions and the world in 2010.

• Janssens et al., 2015: HTAP_v2.2: a mosaic of regional and global emission grid maps for2008 and 2010 to study hemispheric transport of air pollution