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Enhancing European Monitoring Infrastructure for Reactive Trace Gas Analysis

This study focuses on improving the infrastructure for monitoring reactive trace gases in Europe. It discusses data quality guidelines, measurement techniques, calibration, and quality assurance processes. The text provides insights into Round Robin experiments, harmonization efforts, and recommendations for enhancing measurement quality.

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Enhancing European Monitoring Infrastructure for Reactive Trace Gas Analysis

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  1. Towards an improved European Infrastructure for reactive trace gas monitoring within ACTRIS Christian Plass-Duelmer, Stefan Reimann, S. Gilge, A. Werner, C. Hoerger, the ACTRIS Team

  2. WP4: Trace gases networking: Volatile organic carbon and nitrogen oxides EMEP WMO/GAW CCL Data Quality Objective Meas. Guidelines Qualtity Assurance Data Reporting WCC / QA-SAC AMOHA FP5 project ACTRIS-VOC/NOx Activities Integration/Harmonization Funding

  3. Reactive Gases Development of concepts, drafts, dissemination, revisions in ACTRIS NA4 Community Work shop Ispra, Oct 2011, Work shop Hohenpeißenberg, June 2012 Several bi-lateral meetings ACTRIS-GAW Community GAW VOC Expert Group, York, Sep 2012 WMO/GAW Meeting, Geneva, Feb 2013 ACTRIS-EMEP Community EBAS Data workshop, Oslo, May 2012 EMEP TFMM , May 2011, May 2013 ACTRIS-AQUILA Community Cooperation in method development, Participate in RR and intercomparisons

  4. How do stations measure? Status Stations – Measurement Techniques and QA/QC See www.actris.net wp4Documents/StationQuestionnaires VOC NOx Air Inlet X X Sampling X Preconcentration X Instrument X X Operation, Maintenance X X Data acq. And processing X X QA/QC, documentation X X Data submission X X Sketch of system X X Chromatograms X

  5. DQO of ACTRIS and GAW What are the recommendations? How can the stations improve? VOC Draft Measurement Guidelines • See www.actris.net wp4Documents • Rational and objectives • Data Quality Objectives • measurement set-up and sampling • measurement instruments • calibration • QA and QC • data evaluation • uncertainty • data submission NOx

  6. ACTRIS Round Robin Experiments Two Legs - ACTRIS 1 /2 NO: synthetic mixture ppm in N2 How good are the calibration standards at the stations? NO, relative deviation from NPL reference value

  7. VOC-round robin: 1ppb NMHC in N2 (expand. combined uncertainty, k=2) isoprene

  8. VOC-round robin: 1ppb NMHC in N2 (Numbers = % deviations, green < ACTRIS DQO) Deviation < ACTRIS DQO Deviation < GAW DQO Dev. < uncertainty, > GAW DQO Dev. > uncertainty, > GAW DQO

  9. What is the quality of ambient measurements? VOC whole air intercomparison during round robin experiment

  10. Deviations from Reference values for one station (orange: VOC in N2, green: VOC in air) FID-C-Response as diagnostic tool (blue: lab-standard, red: ACTRIS VOC in N2) Lab-Stand

  11. 14 NO/NO2 instruments sampling from a common manifold at Hohenpeissenberg, Nov, 12.-16., 2012 • 10x CLD with PLC/BLC or Mo converters, 1x LIF, 1x DOAS, 1x CAPS, 1x CRD • initial calibration at the beginning of SBS via manifold • zero gas, synthetic mixtures, ambient air, and spiked ambient air

  12. Time-series ambient

  13. Feed-Back-Plots

  14. Performance of patricipating instruments in air: <20% of data outside DQO, >50% of data outside DQO

  15. Improve quality, disseminate knowledge, Increase data availability expand network • round robin VOC + monoterpenes + side-by-side NOx – stations got feed-back and questions - waiting for station answers • learn about superior techniques, problematic techniques – input for Measurement Guidelines and QA, distribute in community, improve • upcoming OVOC intercomparison with GC-MS/FID and PTR-MS instruments at Hohenpeissenberg in October • papers on RR and comparisons-results • next version Draft Measurement Guidelines – ACTRIS + GAW community – Cross-link with IAGOS, PEGASOS, iLeaps, AQUILA - finalize in GAW Reports • station audits • EBAS data reporting feed-back (data evaluations) Acknowledgement The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 262254.

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