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Update from the AMS Measurements during the EMEP / EUCAARI Intensive Measurement Periods

Update from the AMS Measurements during the EMEP / EUCAARI Intensive Measurement Periods. Eiko Nemitz Centre for Ecology and Hydrology (CEH) United Kingdom. May 2008 (EUCAARI Lagrangian, aircraft) 1 to 31 May 2008 Sep/Oct 2008 (EMEP / EUCAARI) 17 Sep to 16 Oct 2008

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Update from the AMS Measurements during the EMEP / EUCAARI Intensive Measurement Periods

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  1. Update from the AMS Measurements during the EMEP / EUCAARI Intensive Measurement Periods Eiko Nemitz Centre for Ecology and Hydrology (CEH) United Kingdom

  2. May 2008 (EUCAARI Lagrangian, aircraft) 1 to 31 May 2008 Sep/Oct 2008 (EMEP / EUCAARI) 17 Sep to 16 Oct 2008 Feb/Mar 2009 (EMEP / EUCAARI) 25 Feb to 26 Mar 2009 EMEP / EUCAARI Intensive Measurement Campaigns 2008/09

  3. The Aerodyne Aerosol Mass Spectrometer (Q-AMS) Particle Particle Beam Aerodynamic Sizing Composition Generation Thermal Vaporization & Electron Impact Ionization Jayne et al., Aerosol Science Technology33:1-2(49-70), 2000.

  4. Quantitative measurement (verify collection efficiency) Concentration & size distribution But, limitations: Measurement of sub-micron aerosol (40-600 nm) Thermal vapourisation at 600°C: non-refractory aerosol only Good for: NH4NO3, (NH4)2SO4, NH4Cl, organic aerosol Does not measure: sea salt, crustal material, HULIS Ionisation: Thermal vapourisation, followed by electron impact ionisation (70 eV) Less fragmentation than laser ionisation More fragmentation than chemical ionisation Quantitative organic aerosol monitor with chance to recover some information on the nature of the organic aerosol components The Aerodyne Aerosol Mass Spectrometer

  5. Aerosol Components

  6. Real-Time Sites

  7. Sites of AMS Measurements during 2008/09 EMEP/EUCAARI Campaigns

  8. Concentrations May 2008 Note: All data are preliminary at this stage!

  9. Concentrations Sep/Oct 2008

  10. Average NR PM1 Concentrations

  11. Average Relative NR PM1 Composition

  12. Sulphate

  13. Nitrate

  14. Organics

  15. Average Diurnal Cycles - Nitrate

  16. Average Diurnal Cycles - Organics

  17. NH4Cl vs NH4NO3

  18. Analysis Meetings May 2009: PSI October 2009: Univ. Lund Submission of bulk time-series to EBAS 2008 data now Feb/Mar 2009 data by Sept. Analysis & papers (EMEP ACP Special Issue?) Bulk concentrations Organic analysis (PMF, elemental analysis  H/C/O/N) Size distribution Integration with EMEP daily measurements Submission of organic components (HOA, OOA) to EBAS Analysis Steps

  19. Identification of Organic Aerosol Classes by Positive Matrix Factorisation (PMF)

  20. High Resolution Mass Spectral Analysis (Only for HR-ToF-AMS instruments) • Time series of C, H, N, O in organic aerosol • O/C and N/C ratios • OM/OC ratio

  21. AMS Size Distribution at CEH EMEP (Bush)

  22. Largest database of synchronised AMS measurements Measured & analysed in a consistent way Collaboration between EMEP ‘monitoring’ and EUCAARI ‘research’ community EMEP Intensive Measurement Periods have been highly successful in producing data for model validation of aerosol components at European scale  Can we achieve this again on another topic for next IMPs? Achievements

  23. Only few measurements of gas-phase precursor concentrations (NH3, HNO3, SO2, …): Cabauw, Auchencorth, Harwell, Ispra (no AMS), Montseny Only few measurements of simultaneous course-mode NO3- measurements: Cabauw, Auchencorth, Harwell Limitations

  24. Intensive (daily – hourly) heavy metal measurements Detailed organic aerosol characterisation + VOC precursor concentrations (e.g. PTR-MS) Characterisation of concentrations at edge of EMEP domain, incl. vertical gradients Should look for opportunistic synergies with European research projects Needs sufficient preparation time, especially if ‘research’ community is to be involved Possible Topics for Next Intensive Measurement Periods

  25. Centre for Ecology and Hydrology: Chiara Di Marco, Gavin Phillips, Rick Thomas Paul Scherrer Institute: Andre Prevot, Peter De Carlo, Claudia Mohr Univ. Clermont-Ferrand: Karine Sellegri Univ. Kuopio: Petri Tiitta, Tomi Raatikainen Institute for Tropospheric Research: Laurent Poulain Juelich Research Centre: Mensah, Astrid Kiendler-Scharr Univ. Gallway: Manuel Dall’Osto, Colin O’Dowd Univ. Manchester: James Allan, Hugh Coe Univ. Lund: Axel Eriksson, Erik Swietlicki Univ. Colorado: Jose Jimenez, Donna Sueper Aerodyne Research Inc.: Doug Worsnop, Sally Ng Carnegie Mellon Univ.: Lea Hildebrand, Spyros Pandis … Thanks to all Participants!

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