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David Bush T&B Systems, Inc. William Hauze Meteorological Solutions, Inc Cara Keslar Wyoming DEQ

Long-line Tower and Balloon-borne Ozone and Ozone Precursor Vertical Profile Sampling for Upper Green Winter Ozone Study 2011 . David Bush T&B Systems, Inc. William Hauze Meteorological Solutions, Inc Cara Keslar Wyoming DEQ. Overview. Background UGWOS WY DEQ Ozone Forum

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David Bush T&B Systems, Inc. William Hauze Meteorological Solutions, Inc Cara Keslar Wyoming DEQ

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  1. Long-line Tower and Balloon-borne Ozone and Ozone Precursor Vertical Profile Sampling for Upper Green Winter Ozone Study 2011 David Bush T&B Systems, Inc. William Hauze Meteorological Solutions, Inc Cara Keslar Wyoming DEQ

  2. Overview • Background • UGWOS • WY DEQ Ozone Forum • UGWOS 2011 Efforts • Long-line Measurement Methodology • Tower • Tethered Balloon • Preliminary Data

  3. Upper Green Winter Ozone Study (UGWOS) • Upper Green River Wintertime Ozone Study – UGWOS 2007 • Lack of snow and no elevated ozone episodes • Learned enough for planning future years • UGWOS 2008 • Significant elevated ozone observed • Documented spatial scale of problem and developed conceptual model • UGWOS 2009, 2010 • Focused on additional chemistry • Improved mesonet monitoring coverage and communications

  4. UGWOS – Ozone, Met Profiles

  5. UGWOS – Spatial Monitoring

  6. UGWOS – Spatial Monitoring

  7. WY DEQ Ozone Forum • 2009, 2010 Ozone Forum • Review collected data • Discuss remaining issues and questions • Discuss additional monitoring

  8. What is the diurnal vertical structure of the ozone concentrations?

  9. What is the diurnal vertical structure of ozone precursors?

  10. What is the vertical diurnal structure of ozone precursors?

  11. UGWOS 2011 • Tethered Balloon • Tall Tower • Supplemental measurements at WY DEQ Boulder site

  12. Long-line Measurements

  13. Long-line Measurement Equipment • Teledyne/API Model 200E NO/NO2/NOx Analyzer • Teledyne/API Model 400E Ozone Analyzer • Baseline-Mocon Series 9000 NMHC Methane/Non-Methane Analyzer • Campbell Scientific CR10 Data Logger w/ A6REL-12 Relay Drive • RM Young Wind Monitor and temperature sensors at Tower • Hobo Pro temperature/RH sensors on Tethered Balloon

  14. Long-line Measurements • Dedicated 5/16” ID Teflon® tubing to minimize pressure drop within line at 4 lpm • Four levels, with worst-case residence time of 20 seconds • Tower – 4m, 25m, 50m, 75m • Tethered Balloon – 4m, 33m, 67m, 100m

  15. Long-line Measurements To Pump Valved Rotameters To Analyzers Solenoids

  16. Long-line Measurements • Using solenoid control, sampling switches sequentially to next level every 3 minutes • First two minutes used to purge lines and allow analyzers to stabilize to new sample pressure and concentrations (most critical for THC analzyer) • Final minute averaged • Thus, 12 minute cycle, with each hour consisting of five 1-minute averages

  17. UGWOS Tower

  18. UGWOS Tower

  19. UGWOS Tower

  20. UGWOS Tower

  21. UGWOS Tower

  22. Tethered Balloon

  23. Tethered Balloon

  24. Tethered Balloon

  25. Preliminary Data - Tower

  26. Preliminary Data – Tethered Balloon

  27. Preliminary Data – Tethered Balloon

  28. Acknowledgements • Wyoming DEQ • Meteorological Solutions, Inc. • Air Resource Specialists • Environ • Sacramento Metropolitan AQM, California ARB

  29. Suggestion for Future Studies – A Bigger Truck

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