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11 th Joint EIONET and Task Force on Emission Inventories and Projections Meeting Cyprus May 2010

Gap- filling of the EU-27 CLRTAP inventory Sabine Göttlicher, Katarina Mareckova and Michael Gager ETC/ACC (Umweltbundesamt, Austria) Martin Adams European Environment Agency. 11 th Joint EIONET and Task Force on Emission Inventories and Projections Meeting Cyprus May 2010.

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11 th Joint EIONET and Task Force on Emission Inventories and Projections Meeting Cyprus May 2010

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  1. Gap-fillingofthe EU-27 CLRTAP inventorySabine Göttlicher, Katarina Mareckova and Michael GagerETC/ACC (Umweltbundesamt, Austria) Martin Adams European Environment Agency 11th Joint EIONET and Task Force on Emission Inventories and Projections Meeting Cyprus May 2010

  2. Table of Contents Why is gap-filling necessary? The process of gap-filling so far Introducing a gap-filling procedure The basic process applied in 2010 The benefits of the more complete gap-filling procedure Remaining issues and challenges

  3. Why is gap-filling necessary? • It is the responsibility of Member States to submit full and accurate inventory data sets • Ideally, there should be no need to gap-fill the reported inventory data • However, Member States’ submissions contain various data gaps • The most frequent problems observed are: • Submissions are not provided for the most recent year or other years • emissions of some pollutants (e.g. PM2.5, the HMs, POPs and NH3) are not provided for some years • sectoral emissions are missing and only national totals are provided

  4. The process of gap-filling so far • It is a requirement of the EMEP Reporting Guidelines that submitted emission inventories be complete as possible • Thus, the EU inventory has to be gap-filled • In previous years, the EC inventory was partially gap-filled • official data reported by Member States under other reporting obligations (e.g. the NEC Directive and EU-MM) was used to fill gaps • EC inventory was still incomplete for certain pollutants including at NT level

  5. Introducing a gap-filling procedure • Ideas for gap-filling were presented and discussed at previous EIONET/Task Force Meetings • The rules for gap-filling were described in the technical paper “Proposed gap-filling procedure for the European Community LRTAP Convention emission inventory” (EEA, 2009) • Further discussion and agreement to trail a more complete gap-filling procedure in 2010 at a meeting of Member States’ representatives in September 2009 * *Meeting ofthe Air andFuelsCommitteeunderDirective 96/62/EC: Information on the Member States reportingunderthe NEC Directive 2001/81/EC, 28 September, 2009, Brussels)

  6. Introducing a gap-filling procedure The gap-filling procedure applied in 2010 was described in the CLRTAP report that was sent out for EIONET review on 8 April 2010

  7. The basic process applied in 2010 MS CLRTAP emission inventory submitted to CDR in 2010 and previous years Dataset complete Dataset not complete MS MM data 2010 (CRF) no gap-filling 14 MS Dataset not complete Dataset complete Gap-filling with other officially submitted data sets no further gap-filling MS NEC data Dataset complete Dataset not complete no further gap-filling CLRTAP emission inventory submitted to EMEP Dataset not complete Further gap-filling procedures

  8. The basic process applied in 2010 Inventory gap-filled with officially submitted datasets year(s) missing in the middle first year(s) missing, then 5 consecutive years available interpolation 6 MS Further gap-filling procedures: extra- & interpolation etc. extrapolation “backwards” gap but 5 consecutive year(s) are not available or do not follow a trend (r2 < 0.6) last year(s) missing, before 5 consecutive years available extrapolation “forwards” previous or next year value used 10 MS

  9. The basic process applied in 2010 Only data previously reported in NFR or CRF was used as a starting point NT and complete or incomplete sectoral data available: no gap-filling No NT and no sectoral data available: sectors gap-filled first, then sectors added up to NT NT but no sectoral data available: gap-filling using previous year split

  10. The basic process applied in 2010 If data used as a base for gap-filling were NA or NO they were treated like 0

  11. The basic rules applied in 2010 Extrapolation was not allowed to result in negative values

  12. The benefits of the more complete gap-filling procedure More complete EU-27 inventory Better compliance with EMEP guidelines Gaps in NT for CO and NH3 filled Possible to present trends for HMs and POPs

  13. Remaining issues and challenges

  14. Remaining issues and challenges

  15. Remaining issues and challenges

  16. Any recommendations and suggestions for improvement are welcome Contact: Sabine Göttlicher (ETC/ACC) sabine.goettlicher@umweltbundesamt.at ETC/ACC is financially supported by the European Environment Agency

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