Deposition and nitrogen budget


The deposition of acidifying and eutrophying components and crop damage due to ozone fluxes are still a major issue in the field of atmospheric pollution.

LOTOS-EUROS contributes to high-resolution deposition studies. It is one of the few models with a compensation point – the concentration of a given component at which atmospheric uptake equals deposition. This means that the deposition of ammonia depends on the presence of an ammonia reservoir at ground level and re-emission may even occur.

Deposition of nitrogen (oxidized + reduced) over Germany, assessed using the LOTOS-EUROS model in combination with observations of wet deposition (left) and phyto-toxic ozone dose for spruce (right)
Deposition of nitrogen (oxidized + reduced) over Germany, assessed using the LOTOS-EUROS model in combination with observations of wet deposition (left) and phyto-toxic ozone dose for spruce (right)
2009-all-sectors-nox_800
Example: NOx emissions for the year 2009 (all sectors)
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Time series of modelled and measured ammonia concentrations in Bonheiden (Belgium) in 2009, showing the reduction of the unrealistic second NH3 peak of the default simulation brought about by using a meteorology-dependent emission factor for NH3 instead of time profiles based on long-term averages.