Hemispheric transport – Why is EMEP interested? Peringe Grennfelt, Jurgen Schneider

Peringe Grennfelt 10 mars Contents The role of EMEP within the CLRTAP Links to hemispheric scale Conclusions

Peringe Grennfelt 10 mars The CLRTAP Protocols under the Convention 1983 EMEP Protocol (financing instrument) 1985 and 1994 Sulphur Protocols 1988 NOx Protocol 1991 VOC Protocol 1998 HM Protocol (Pb, Cd and Hg) 1998 POP Protocol 1999 MPME Protocol (SO 2, NOx, NH 3 and NMVOC)

Peringe Grennfelt 10 mars ROLE OF EMEP Role of EMEP is to provide Parties to the Convention with information on  emissions,  deposition and  concentrations of air pollutants, with  quantified source attribution of the concentrations, depositions and  transboundary fluxes related to acidification, eutrophication, photo-oxidants, particulate matter, heavy metals and persistent organic pollutants.

Peringe Grennfelt 10 mars Effect based approach This knowledge is in particular needed to support the development of Protocols of the second generation:  Science based approach (use quantitative scientific knowledge to reduce emissions in a cost effective way)  Not a universal percentage reduction or uniform absolute environmental target (e.g., AQ standard), but rather emission reduction requirements that reduce environmental and health impact costs effectively  High demands on data and process understanding!

Peringe Grennfelt 10 mars Institutional settings  4 Centres: MSC-E, MSC-W, CIAM and CCC  Strong involvement of national experts from parties and the scientific community is vital; this collaboration is usually facilitated by the Task Forces –Emissions: TF EIP, produces EMEP/CORINAIR guidebook, promotes inventory improvement (by reviews,..) –AQ data: TFMM, CCC: New Monitoring strategy, strong involvement of parties, EMEP manual,… –Atmospheric modelling: TFMM, MSC-W and MSC-E –Integreted assessment models: TFIAM, CIAM –Hemispheric transport: TFHTAP, supported by all Centres

Peringe Grennfelt 10 mars Significance of a Hemspheric Transport initiative Improve the understanding of chemical and physical processes in order to support the development of cost- effective abatement strategies. -> There is a need to assess sources and receptors of air pollution at different scales, including the understanding of the significance of intercontinental transport processes.

Peringe Grennfelt 10 mars Pollutants subject to hemispcheric transport The three most recent Protocols tackle problems which at least have a hemispheric component: –POPs Protocol –Heavy metals Protocol: Hg –Gothenburg Protocol: Ozone

Peringe Grennfelt 10 mars POPs Intercontinental transport of HCB Europe Arctic Origin of HCB depositions Source: EMEP, MSC-E

Peringe Grennfelt 10 mars Mercury Mercury, 2002 Transport outside Europe ~ 120 t/y (65 % of total emission) Source: EMEP, MSC-E Deposition: to Europe t/y from European sources - 50 t/y from global, natural, and re-emission sources - 50 t/y Spatial distribution of Hg depositions in Europe

Peringe Grennfelt 10 mars Ozone Recent assessments have clearly indicated the increasing importance of hemispheric background of ozone From Derwent et al

Peringe Grennfelt 10 mars Ozone This is in particular relevant for the assessment of environmental and health effects (a recent review by the World Health Organization confirmed that ozone is a pollutant where thresholds for effects cannot be identified at this stage) During the review of the EMEP unified Eulerian model, it was recommended that… further consideration should be given to … the continued increase in background ozone concentrations… (EB.AIR/GE.1/2004/6)

Peringe Grennfelt 10 mars Ozone The Gothenburg Protocol from 1999 (which entered into force on May 17) itself requests in Article 8 on “Research, Development and Monitoring” that Parties shall encourage research, development and monitoring and cooperation related to … (d) The improvement of scientific understanding of the long term fate of emissions and their impact on the hemispheric background concentrations of S, N, VOC, O 3, PM, focusing, in particular, on the chemistry of the free troposphere and the potential for intercontinental transport flow of pollutants …..

Peringe Grennfelt 10 mars Conlusions  Some of the pollutants tackled within the Convention have a hemispheric component  EMEP is requested to investigate the significance of this transport (in a scientific/technical sense)  Therefore, the work of this TF is of crucial relevance for EMEP  According to the well established working mode of EMEP, this investigation is to be done in an open, transparent way in close collaboration with the scientific community