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Review of the EMEP monitoring strategy

The TFMM is expected to review the EMEP monitoring strategy A concept for a new strategy will be outlined considering Current status Shortcomings Discussions at the 24th Steering body (Sept 2001) New requirements and developments Need for conservatism.

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Review of the EMEP monitoring strategy

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  1. The TFMM is expected to review the EMEP monitoring strategy A concept for a new strategy will be outlined considering Current status Shortcomings Discussions at the 24th Steering body (Sept 2001) New requirements and developments Need for conservatism Review of the EMEP monitoring strategy

  2. Spatial characterisation of atmospheric composition and deposition amounts Regional features Detailed and site specific Temporal changes In relation to emission changes compliance natural variations CTM validation Understanding processes Model development Non-linearities Purpose of the monitoring programme

  3. Linking of scales (hemispheric-regional-local scale) Geographical coverage Improved site specific deposition and exposure estimates Site density, monitoring fluxes Data assimilation and use of remote sensing techniques Trend assessment Monitoring fluxes Future challenges! Hot topics

  4. Long term data provision Provide a formal basis for data provision Consider financial limitations Adequate and known quality Siting Methodology Training Quality assurance Data availability Expert involvement Scientific credibility Particular needs

  5. POPs POPs POPs POPs POPs POPs POPs

  6. A ”level” approach is proposed Similar as developed for particulate matter Open for the use of other relevant data Encourage national efforts Level 1; Mandatory programme, large number of sites Spatial and temporal trends Continuous sampling Level 2; Advanced measurements at selected sites Expensive or technically demanding Spatial and temporal trends Process oriented Continuous or campaigns Level 3; Research data, partly from external providers Expensive or technically demanding Process oriented Campaigns or continuous

  7. Level 2 and level 3 sites could be nominated as ”EMEP supersites” Important motivation factor Provides recognition for the data providers Measure of number of parameters, not necessarily of quality Supersites could be topic specific (important overlaps) acidification/eutrofication fotooxidants heavy metals persistent organic compounds particles provide complementary data to the extent possible Monitoring required for the individual topics need revision Parameters, Time resolution, Spatial coverage, Methodologies Priorities between topics should be also revised Assessment report will give guidance

  8. Distribution of Level 2 and level 3 sites Geographic consideration with respect to topic National involvement and interests Cost limitations/cost sharing Still need for monitoring campaigns Denuder campaign EC/OC campaign VOC campaign

  9. Applicable methods have previously not been available Improved micrometeorological methods have recently been developed (e.g. Eurotrac BIATEX2) Relaxed eddy accumulation method Ozone uptake modelling Improved dry deposition scheme in EMEP model Trends Requires special siting criteria Flux measurements

  10. Monthly SO2 and meteo data at Speulder forest (1992 - 1998) From Erisman et al.,

  11. Trends in NH3 concentration, NH3 flux and Rc Speuder forest; From Erisman et al,

  12. 180 0.9 160 0.8 140 0.7 120 0.6 100 0.5 Rc (s/m) NH4/(SO4+NO3) 80 0.4 60 0.3 40 0.2 20 0.1 0 0 Speulder forest Melpitz Auchencorth Rc NH3 Rc SO2 NH4/(SO4+NO3) Rc and molar NH4/(SO4+NO3) in precipitation at three sites (LIFE) From Erisman et al.,

  13. Knowledge on gas to particle distribution is important Denuder measurements will be sparse The artefact problem with filter packs is well known Only sums are currently reported Would it be better to report gas and particle distribution as derived from the filterpack separately? Gas to particle distribution for sNO3 and sNH4

  14. “NH4” concentrations at NO01 and NO08 in 1996

  15. Site representativity Improved spatial resolution Trend studies Gas to particle distribution What can we obtain from low cost methods like passive flux samplers and diffusion denuders?

  16. Propose parameters to be measured at level 1 sites Define needs for level2 and level3 sites (supersites) Recruit supersites (HM, POPs, PM, +) List POPs to be measured Revise list of VOCs Develop requirements for number of sites, parameters, integration times, geographical distribution etc. Preliminary outline to be presented at the 25th SB? A dedicated workshop in 2003 ? How to proceed?

  17. Flux measurements NH3 New PM strategy

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