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page 30 of 142 RIVM report 773301 001 / NRP report 410200 051
Although the total NO x emission for Europe of EDGAR is in reasonable agreement with
CORINAIR, there are some noticeable regional and sectoral differences. Emission estimates for
stationary combustion (SNAP 01, 02, 03) are for Eastern Europe somewhat lower in EDGAR
compared to CORINAIR90. In the GEIA inventories CORINAIR'85 formed the basis, a similar
difference was found in the validation with GEIA (see above). Yet, given the available background
information on the emission factors it has been concluded that the EDGAR V2 factors for stationary
combustion do not require adjustment (see validation with GEIA). As has been observed for other
substances, in CORINAIR the distinction between emissions from processes and industrial
combustion is not always consistent in practice. Furthermore, EDGAR uses higher NO x emission
factors for cement production (included under SNAP 04 in EDGAR). This could explain the
differences found for Western and Eastern Europe for SNAP 04, process emissions. For road
transport emission estimates agree. For non-road transport however, new emission factors for the
different transport modes have been entered in EDGAR. The EDGAR emission estimate for SNAP
09, waste treatment and disposal, is dominated by the contribution of agricultural waste burning
which is not included in CORINAIR. However, EDGAR does not include the source category
controlled municipal waste incineration. This source represents some 200 kt of NO x emission in
CORINAIR.
For SO 2 differences between EDGAR and CORINAIR are sometimes unexpectedly high. The
biggest difference can be noted for process emissions. For Western Europe, emissions for this sector
are almost twice as high in EDGAR relative to CORINAIR. This can be brought back to the EDGAR
estimates for sulphur emission from non-ferrous metals production, which amounts to more than 5000
kton for this region. In CORINAIR only 200 kton is reported for this source (which is listed under
SNAP 03 in CORINAIR). Emission factors for non-ferrous metals production appear to differ
significantly. EDGAR uses a global default value. In addition, EDGAR includes some 400 kton SO 2
originating from biofuel use in industry, which is not regarded in CORINAIR. The differences found
for small combustion sources and road transport can be explained by the different assumptions of the
sulphur content of coal and diesel fuel respectively.
In conclusion, validation of EDGAR V2 with the CORINAIR90 emission inventories has resulted in
among others the following points of interest:
ú EDGAR 2.0 contains rather inaccurate emission factors for non-road transport;
ú EDGAR includes rather high emissions from agricultural waste burning;
ú EDGAR does not contain emission estimates for controlled waste incineration;
ú Separation of emissions from processes and combustion are in CORINAIR not always
consistently distinguished which makes a detailed comparison difficult;
ú For some combustion sources NO x emission factors from EDGAR seem somewhat lower on
average;
ú Sulphur contents seem to vary for domestic and automotive fuels.
A number of these topics are addressed in Section 4.2.3.
&RPSDULVRQZLWKLQYHQWRULHVLQ6HFRQG1DWLRQDO&RPPXQLFDWLRQV
Second in a series, Van Amstel HWDO (1999) report on a more detailed analysis of differences between
national emission inventories of CO 2 , CH 4 and N 2 O included in so-called second National
Communications on Climate Policy of industrialised countries and global inventories such as EDGAR
2.0 and atmospheric concentration data. National inventories as reported to the Climate Convention
Secretariat and compiled by the Secretariat in tables (UNFCCC/CP/1996/12/Add.2 and
UNFCCC/CP/1998/11/Add.2) and country study results (as cited in Braatz HWDO., 1996) were compared
with EDGAR 2.0 emission estimates. Relatively large differences were analysed. The study provided
background information for IPCC expert meetings in 1999 on *RRG 3UDFWLFH *XLGDQFH DQG
8QFHUWDLQW\0DQDJHPHQW (IPCC, 2000). It also supports the review and synthesis process of national
communications by the Climate Secretariat and the 6XEVLGLDU\%RG\RQ6FLHQWLILFDQG7HFKQRORJLFDO
$GYLFH(SBSTA).