Report - DCE - Nationalt Center for Miljø og Energi

http://cdr.eionet.europa.eu/dk/Air_Emission_Inventories/Submission_E
MEP_UNECE
Further, a detailed methodological description is given in Plejdrup &
Gyldenkærne (2011).
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A national model for high resolution spatial distribution of emissions to air,
the SPREAD model, has been developed at Department of Environmental
Science, Aarhus University. SPREAD includes all sources and pollutants in
the Danish emission inventory system, and generates emissions on a resolution
of 1 km x 1 km. The spatial emission distribution is carried out on the
most disaggregated level possible and therefore SPREAD includes a large
number of distribution keys related to single sources, sub categories and in a
single case to a whole sector. Gridded emissions reported to UNECE LRTAP
are based on the results from SPREAD, aggregated on the 50 km x 50 km
EMEP grid.
The spatial distribution in SPREAD is based on a number of national geographical
data sets. As the model is very complex and include many spatial
data, only the most important input data and methodology will be included
in the IIR report. For a more detailed description, please refer to Plejdrup &
Gyldenkærne (2011).
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The distribution in SPREAD is made on SNAP category level to assure the
most accurate distribution of the emissions. It has been aimed to use the
most disaggregated SNAP level (SNAP 3 level) but for some categories and
sectors SNAP 2 or SNAP 1 level has been applied in the distribution model,
due to lack of detailed geographical information. An exception is the agricultural
sector, as this sector is not treated on SNAP level in the Danish inventory
system. Instead the agricultural data processing is carried out for the
relevant NFR categories, and the same approach is applied in SPREAD. The
SPREAD model is prepared in order to be applicable for the mandatory reporting
of gridded emissions to CLRTAP.
SPREAD includes a number of sub-models covering separate sources or
groups of sources in the emission inventory; Large Point Sources, Stationary
combustion for point sources, Stationary combustion for area sources, Mobile
sources, Aviation, Fugitive emissions from fuels, Industrial Processes, Fgases,
Solvent and other product use, Waste, and a number of sub-models
for the agricultural sector. All sub-models correspond to the methodology
and groupings in the Danish inventory system. A number of sub-models include
a higher disaggregation level compared to the NFR tables. Both SNAP
and NFR categories are included in all SPREAD sub-models to enable a distribution
in agreement with the international guidelines.
Emissions from all Large Point Sources (LPS) are treated in the LPS submodel
in SPREAD. LPSs represent emissions at all SNAP 1 categories except
solvents (SNAP 06) and road traffic (SNAP 07). Further, LPSs in agriculture
(SNAP 10) are included in a separate part of the emission database system
covering agriculture and are not included in the LPS sub-model in SPREAD.
The Point Sources sub-model covers emissions from stationary combustion