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Informative Inventory Report 2016 : Emissions of transboundary air pollutants in the Netherlands 1990-2014

Informatieve Inventory Report 2016

Synopsis

Ammonia emissions increased

In 2014 total Dutch ammonia emissions increased. Despite the decrease during the period 1990-2013, the ammonia emission still exceeds the maximum set to this by the European Union since 2010. Two important contributors to the increase are the growth in dairy cattle and the altered cattle feed composition. Emissions of nitrogen oxides, sulphur dioxides and non-methane volatile organic compounds continue to decrease slightly. For this end the Netherlands are complying to the ceilings set.

This is concluded by the Informative Inventory Report 2016. In this, the RIVM and partner institutes collect, analyse and report emission data. Apart from substances as mentioned above, this also includes emissions of carbon monoxide, particulate matter, heavy metals and persistent organic pollutants. The emissions of most of these substances have decreased during the 1990 - 2014 period. The downward trend may in particular be attributed to cleaner fuels, cleaner car engines and to emission reductions in industry.

Adjustments for agriculture
In 2014 ammonia emissions increased by 3.4 Gg compared to 2013 to a national total of 133.8 Gg. Partly this increase was a result of the altered cattle feed composition. As a result of the good quality of processed grass, fed to dairy cattle in 2014, digestibility and therefore ammonia emission per animal increased. In combination with the growth in animal number, the total ammonia emission increased. New insights on manure application techniques lowered the ammonia emission series retroactively from 2008 by about 3.0 Gg. On the other hand ammonia is increased by about 0.5 Gg per year during grazing, by adjusting the emission factor upward.

Adjustments transport
When nitrogen oxides emissions by transport are concerned, some issues raise attention. The emissions by light-duty vehicles have now been measured and appear to be higher than until previously calculated. Diesel sales and on such based road transport emissions have in 2014 relatively decreased steeper (8 percent compared to 2013) than emissions based on fuel use (1.6 percent). Nitrogen dioxide emissions from mobile machinery in harbours were added as a new source. The contribution to the national is 1.2 percent.
 

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