2011 national air quality conferences long-line tower and balloon-borne ozone and ozone precursor...

2011 National Air Quality Conferences2011 National Air Quality Conferences

Long-line Tower and Balloon-Long-line Tower and Balloon-borne Ozone and Ozone Precursor borne Ozone and Ozone Precursor

Vertical Profile Sampling for Vertical Profile Sampling for Upper Green Winter Ozone Study Upper Green Winter Ozone Study

2011 2011

David BushT&B Systems, Inc.

William HauzeMeteorological Solutions, Inc

Cara KeslarWyoming DEQ


OverviewOverview

• Background

• UGWOS

• WY DEQ Ozone Forum

• UGWOS 2011 Efforts

• Long-line Measurement Methodology

• Tower

• Tethered Balloon

• Preliminary Data


Upper Green Winter Ozone Study Upper Green Winter Ozone Study (UGWOS)(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


UGWOS – Ozone, Met Profiles


UGWOS – Spatial Monitoring


WY DEQ Ozone ForumWY DEQ Ozone Forum

• 2009, 2010 Ozone Forum

• Review collected data

• Discuss remaining issues and questions

• Discuss additional monitoring


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


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


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


UGWOS 2011

• Tethered Balloon

• Tall Tower

• Supplemental measurements at WY DEQ Boulder site


Long-line MeasurementsLong-line Measurements


Long-line Measurement Equipment 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



• 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



Valved Rotameters

Solenoids

To Pump

To Analyzers



• 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


UGWOS TowerUGWOS Tower


Tethered BalloonTethered Balloon


Preliminary Data - TowerPreliminary Data - Tower


Preliminary Data – Tethered BalloonPreliminary Data – Tethered Balloon


Acknowledgements Acknowledgements

• Wyoming DEQ

• Meteorological Solutions, Inc.

• Air Resource Specialists

• Environ

• Sacramento Metropolitan AQM, California ARB


Suggestion for Future Studies – A Bigger TruckSuggestion for Future Studies – A Bigger Truck

2011 national air quality conferences long-line tower and balloon-borne ozone and ozone precursor...

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