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capri:concept:ammo [2011/04/11 09:40] – gochtcapri:concept:ammo [2011/04/11 09:40] – external edit 127.0.0.1
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 +<H2><a class="intext" HREF="/dokuwiki/doku.php?id=capri:concept:spatialdownscaling">Agricultural land use and environmental indicators at 1x1 km grid resolution</A><BR> - Ammonia and Further Gaseous Nitrogen Emissions</H2>
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 +Main contributors for emission factor approach: Didi Oedendag, Hans-Peter Witzke, Wolfgang Britz
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 +Main contributors for DNDC-Link: Declan Mulligan, Adrian Leip, Wolfgang Britz
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 +<P>For <B>gaseous emissions of nitrogen</B> there are results for two different approaches combined:</P>
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 +    <H3>Emission factor approach</H3>
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 +    <P>The emission factor approach used during spatial downscaling to estimate gaseous emissions per grid cell
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 +    is taken over from CAPRI where it is to a large extent harmonized with the MITERRA model, thanks to a
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 +    <a class="intext" HREF="http://ec.europa.eu/environment/archives/air/cafe/activities/ammonia_en.htm"> recent project</a>
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 +    for DG-ENV. Emsisions factors for specific sources (manure storage, manure application, animals in stables..)
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 +     are linked to animal activities or spreading of fertilizers, and depend on factors as the share of specific animal housing systems where data are typically
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 +     based on expert knowledge and inputted at the national level. The emission factor approach is closely linked to the
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 +     <a class="intext" HREF="/dokuwiki/doku.php?id=capri:concept:nbal">nitrogen balance</a> calculation.</P>
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 +     <P>The application of emissions factors provides a rather robust and simple way of estimating gas losses from agriculture. The data at grid level
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 +     are linearly depending on animal stocking densities, crop shares and fertilizer applications.<P>
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 +    <H3>Use of the bio-physical model DNDC</H3>
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 +        <P>For emissions occuring outside stables and storage, DNDC provides a far more complex way based on deterministic bio-physical simulation model
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 +        where soil and weather in combination farm management determine gaseous emissions.</P>
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 +        <P>The calculation per grid cell is based on the application of <a class="intext" HREF="/dokuwiki/doku.php?id=capri:concept:DNDCMeta">statistical meta-model derived from DNDC.</a></P>
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 +        <P>The emissions simulated by DNDC cannot directly be compared with those reported from the emission factor approach as DNDC as mineralization from
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 +         soils into account and thus provides an additional source of nitrogen which is not included in the
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 +         nitrogen balance approach to which the emission factor approach is linked.</P>
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 +<H3>More information</H3>
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 +<P><a class="intext" HREF="http://ec.europa.eu/environment/archives/cafe/general/keydocs.htm">The European Clean Air for Europe Program</a>
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 + - where the CAPRI network contributes to "Baseline Scenario and Integrated Assessment Modelling".</p>
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 +<font size=1>Last Updated:Tuesday, October 28, 2008
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