The Norwegian Emission Inventory 2013

The Norwegian emission inventory is a joint undertaking between the Norwegian Environment Agency and Statistics Norway. Statistics Norway is responsible for the collection and development of activity data, and emission figures are derived from models operated by Statistics Norway. The Norwegian Environment Agency is responsible for the emission factors, for providing data from specific industries and sources and for considering the quality, and assuring necessary updating, of emission models like, e.g., the road traffic model and calculation of methane emissions from landfills. Emission data are used for a range of national applications and for international reporting. The Norwegian Environment Agency is responsible for the Norwegian reporting to United Nations Framework Convention on Climate Change (UNFCCC) and to United Nations Economic Commission Europe (UN-ECE).

This report documents the methodologies used in the Norwegian emission inventory of greenhouse gases (GHG), acidifying pollutants, heavy metals (HM) and persistent organic pollutants (POPs). The documentation will also serve as a part of the National Inventory Report submitted by Norway to the United Nations Framework Convention on Climate Change (UNFCCC), and as documentation of the reported emissions to UNECE for the pollutants restricted by CLRTAP (Convention on Long-Range Transboundary Air Pollution). LULUCF (land use, land-use change and forestry) is not considered in this report, see the National Inventory Report (Climate and Pollution Agency 2013) for documentation on this topic.

This report replaces the previous documentation of the emission model (Sandmo 2012), and is the latest annually updated version of a report edited by Britta Hoem in 2005. The most important changes since last year’s documentation are:

• Sewage sludge has been included as a source of emissions of CH ₄ and NH ₃
• Estimation of CO ₂ from use of soda ash outside production of glass wool and nickel has been included
• A previously lacking description of NOx from glass fibre production has been added
• The emission factors for particulates from combustion of wood sector have been revised
• Factors for nitrogen excretion from domestic animals have been updated. This influences emissions of N ₂ O and NH ₃ from manure in the agriculture sector
• The data source for young cattle and animals for slaughter have been changed. This influences emissions of CH ₄ and NH ₃ from manure in the agriculture sector

Previous editions of this report included a detailed description of recalculations in the most recent emission figures. These recalculation descriptions can now only be found in the National Inventory Report (Climate and Pollution Agency 2013).

The Norwegian Emission Inventory 2013; Documentation of methodologies for estimating emissions of greenhouse gases and long-range transboundary air pollutants is also available at http://www.ssb.no.