Denmark's National Inventory Report 2005 - Submitted under the ...

9 Future improvements
Some planned improvements of the emission inventories are discussed below.
1) Improved documentation for CO 2 emission factors
The CO 2 emission factors applied for the Danish inventories are considered accurate,
but documentation will be improved in future inventories. The documentation will
be improved when the large plants start reporting CO 2 emission based on plant specific
CO 2 emission factors (2006).
2) Improved documentation for other emission factors
Reporting of and references for the applied emission factors have been improved in
the current year and will be further developed in future inventories.
3) QA/QC and validation
The QA/QC and validation of the inventories for stationary combustion will be implemented
as part of the work that has been initiated for the Danish inventory as a
whole. Implementation will start in 2005.
4) Uncertainty estimates
Uncertainty estimates are based mainly on default uncertainty levels for activity rates
and emission factors. More country-specific uncertainty estimates will be incorporated
in future inventories.
The uncertainty of the N 2 O emission factor from stationary combustion plants is a
default value from the IPCC GPG. This uncertainty is a major uncertainty in the total
Danish GHG inventory. Several of the applied N 2 O emission factors are, however,
based on emission measurements on a considerable number of Danish plants, and
thus the uncertainty is considered overestimated. A country specific uncertainty estimate
for N 2 O will be estimated next year.
5) Other improvements
− The criteria for including a plant as a point source should be defined and the list of
plants updated annually.
− White spirit will be dislocated to the fuel category Other oil in the IPCC reference
approach.
10 Conclusion
The annual Danish emission inventories are prepared and reported by NERI. The
inventories are based on the Danish energy statistics and on a set of emission factors
for various sectors, technologies and fuels. Plant-specific emissions for large combustion
sources are incorporated in the inventories.
Since 1990 fuel consumption has increased by 25% - fossil fuel consumption, however,
by only 18%. The use of coal has decreased whereas the use of natural gas and
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