Spatial distribution of emissions to air - the SPREAD model

SpatIal dIStrIButIoN of emISSIoNS
to aIr – the Spread model
the National environmental research Institute (NerI), aarhus
university, completes the annual national emission inventories
for greenhouse gases and air pollutants according to
denmark’s obligations under international conventions, e.g.
the climate convention, uNfCCC and the con-vention on
long-range transboundary air pollution, Clrtap. NerI has
developed a model to distribute emissions from the national
emission inventories on a 1x1 km grid covering the dan-ish
land and sea territory. the new spatial high resolution distribution
model for emissions to air (Spread) has been developed
according to the requirements for reporting of gridded
emis-sions to Clrtap. Spatial emission data is e.g. used as
input for air quality modelling, which again serves as input for
assessment and evaluation of health effects. For these purposes
dis-tributions with higher spatial resolution have been
requested. previously, a distribution on the 17x17 km emep grid
has been set up and used in research projects combined with
detailed distributions for a few sectors or sub-sectors e.g. a distribution
for emissions from road traffic on 1x1 km resolution.
Spread is developed to generate improved spatial emission
data for e.g. air quality modelling in exposure studies. Spread
includes emission distributions for each sec-tor in the danish
inventory system; stationary combustion, mobile sources,
fugitive emissions from fuels, industrial processes, solvents
and other product use, agriculture and waste. this model
enables generation of distributions for single sectors and for a
number of sub-sectors and single sources as well. this report
documents the methodologies in this first version of SPREAD
and presents selected results. further, a number of potential
improvements for later versions of Spread are addressed and
discussed.
ISBN: 978-87-7073-221-1
ISSN: 1600-0048