RIVM report xxxxxx xxx

page 20 of 142 RIVM report 773301 001 / NRP report 410200 051
In Table 1.1 below the results of a quantitative comparison on a regional basis between GEIA
and EDGAR has been presented. EDGAR results are listed in six ways: the fifth column of Table 1.1
represents the quotient of the unmodified emissions of GEIA and EDGAR. The results in the sixth
column are comparable to the fifth however the changes in energy use between 1985 and 1990 are
taken into account for certain regions: China region, India region, East Asia, Japan, Eastern Europe,
Canada. These regions have been selected based on whether it was expected that differences between
GEIA and EDGAR results could be for a large part explained by the increasing trend of energy
consumption in 1985 to 1990. This correction for changes in energy consumption has been made
using aggregated emission factors per major fuel type (solid, liquid and gaseous) and energy data
from the IEA. In the seventh column landuse activities have been excluded from the EDGAR results
without the energy correction for 1985 to 1990. The eighth column represents the same but here also
the mentioned energy correction is included. Finally, the ninth and tenth column are comparable with
the seventh and eighth except EDGAR estimates for biofuels are excluded. The regions presented in
Table 1.1 are sorted in descending order of contribution to the global emission total (see second
column).
The global totals of NO x of both inventories seem to be in reasonable agreement with each other,
provided that landuse activities and biofuels are excluded (column 9). As can be expected, substantial
differences are revealed when comparing the raw results for regions in which biofuels and landuse
activities are important. After exclusion of these activities results are in reasonable agreement. Also
for the China and India region and East Asia this correction apparently leads to more comparable
results. However these regions are known to have experienced a considerable economic growth
during 1985 to 1990. A simple correction for the increase of energy consumption in these regions
shows that the GEIA results are now higher than the EDGAR results for these regions. Naturally, the
applied correction is rough and furthermore the GEIA estimates include several fuel types that are not
regarded in EDGAR. In spite of this, the differences are such that major differences in emission
factors can not be ruled out.
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USA 24 24 18 0.8 0.8 0.8
OECD Europe 37 13 12 1.0 1.0 1.0
Africa 48 11 1.7 0.2 0.7 1.1
China region 59 11 7.4 0.7 1.0 0.8 1.1 0.9 1.3
Former USSR 69 11 8.7 0.8 0.9 0.9
Latin America 78 8.9 4.3 0.5 1.0 1.0
India Region 84 5.9 2.7 0.5 0.8 0.7 1.2 1.0 1.6
East Asia 88 3.6 1.6 0.5 0.7 0.6 0.9 0.7 1.1
Middle East 91 3.1 2.4 0.8 1.0 1.0
Japan 94 2.7 1.9 0.7 0.9 0.7 0.9 0.7 0.9
Eastern Europe 96 2.4 3.2 1.3 1.2 1.4 1.3 1.4 1.3
Canada 98 1.9 1.9 1.0 1.1 1.1 1.2 1.1 1.2
Oceania 99 1.3 0.7 0.6 0.6 0.6
Sea (oceans) 100 0.8 1.5 1.9 1.9 1.9
Total 100 100 69 0.7 0.9 0.9