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Improved emission inventories of SLCP

Background analysis

image of Improved emission inventories of SLCP

Emission inventories of Short Lived Climate Pollutants (SLCP), and especially of Black Carbon (BC), are uncertain and not always comparable. Comparable and reliable emission inventories are essential when aiming for efficient strategies and policies for reduced emissions. This report presents the Nordic emissions and emission inventories of SLCP, the important emission sources and their development over time. It also discusses knowledge gaps, factors contributing to the uncertainties, and possibilities for improved emission estimates. The overall objective of the three-year project is to improve the Nordic emission inventories of Short Lived Climate Pollutants (SLCP), with a focus on Black Carbon (BC). This report presents the results from the first phase of the project, an analysis of the present status of knowledge, with focus on BC and particulate matter (PM2.5) emissions from residential biomass combustion, on-road and non-road diesel vehicles, and shipping. The next phase will draw on the results from this background analysis in designing and implementing an emission measurement program, where the objective is to expand the knowledge and develop well documented and reliable emission factors, primarily for BC, for use in future national emission inventories.

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Residential biomass combustion

Even though Denmark, Finland, Iceland, Norway and Sweden are all Nordic countries, the conditions regarding the extent of biomass use in different types of technical combustion appliances differ. Table 7 presents the disaggregation on combustion technologies that are applied in the national Nordic emission inventories, as well as the amount of biomass fuel combusted in each, and the resulting nationally estimated emissions of PM2.5. Denmark differentiates in its inventory on 10 technologies, Finland on 13, Norway on 3 technologies and Sweden on 6. To some extent this represents the differentiated use of residential combustion appliances in the Nordic countries, but not entirely. Denmark, Finland and Norway for example differentiate between old and new equipment while Sweden only differentiates between three main technology types, boilers, stoves and open fireplaces. Finland is the only country which includes specific data for masonry heaters and sauna stoves, which is relevant since these are more common in Finland than in the other countries. In all countries, where relevant, differentiation is made between the types of fuel; wood logs, wood chips or pellets.

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