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capri:concept:ammo [2011/04/11 12:39]
gocht
capri:concept:ammo [2011/04/11 12:40] (current)
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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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 +<hr style="​color:​ '​blue';​ height: '​2';​ text-align: '​left';">​
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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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