Report - DCE - Nationalt Center for Miljø og Energi

lated as the national emission multiplied by the length of the line segment(s)
in the cell and divided by the total length of the line feature.
For some sources the same distribution key can be applied for more or all
years, while other sources demands a separate distribution key for every
year. For Industrial Processes the distribution key can be applied for more
years, as the dataset is not available on annual basis. Further, the industrial
area does not change much from year to year. In other cases the distribution
keys must be set up on annual basis as large changes occur from year to
year. This is the case for e.g. agricultural soils and point sources (PS) in the
energy sector.
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A large number of national geographical data sets are implemented in the
SPREAD model in preparation of the various distribution keys. The data sets
are listed in Table 9.2 with specification of data owner and a short description
of the content of each data set.