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Smith Point Overview during DISCOVER-AQ Houston, Sept 2013

Smith Point Overview during DISCOVER-AQ Houston, Sept 2013. Anne Thompson (NASA & PSU), Deborah Zweers (NASA & GESTAR), Debra Kollonige (UMD), Doug Martins (PSU) AQAST Meeting, Houston, Jan 2014 Thanks to S. Miller & H. Halliday (PSU), R. Clark (MU). Highlights. FACILITIES

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Smith Point Overview during DISCOVER-AQ Houston, Sept 2013

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  1. Smith Point Overview during DISCOVER-AQ Houston, Sept 2013 Anne Thompson (NASA & PSU), Deborah Zweers (NASA & GESTAR), Debra Kollonige (UMD), Doug Martins (PSU) AQAST Meeting, Houston, Jan 2014 Thanks to S. Miller & H. Halliday (PSU), R. Clark (MU)

  2. Highlights • FACILITIES • NATIVE (Nittany Atmospheric Trailer & Integrated Validation Experiment) – Penn State Mobile Lab • Millersville Univ tethered balloon, sodar • Ozone-NO-NOy-NO2 Overview & Late Sept. Episode • Ozonesondes • Special NO2sonde • Methane-CO2 Overview & Late Sept. Episode • Satellite methane comparison • Isotopic C – methane sources

  3. NATIVE OPERATIONS AT SMITH POINT 28/8-27/9 2013 Ozone.met.psu.edu All Data at NASA/Langley Archive Co-located with Millersville (MU) tethered balloon & trailers

  4. Photos: D K Martins

  5. Additional Instruments At Smith Point: PSU Piccaro with 13-C Quadrupole PTR-MS 1 Direct-sun Pandora MOPS GSFC 2 Column Pandoras Cimel MillersvilleU vans, Tethered balloon NOAA Radiometers TCEQ Wind Profiler

  6. NATIVE Ozone Pollution Episode, 24-26 Sept 25 Sept Outlier in Sondes; Mostly moderate in DAQ

  7. Houston Ozone Overview-SEAC4RS & DISCOVER-AQ • Considerable variability throughout troposphere & at TTL • Mixtures of stratospheric air (inferred from H2O-O3 relation) • O3 below ~5 km varies with marine flow, < 40 ppbv, vs recirc of pollution (> 50 ppbv)

  8. NO2-Sonde Operations: Balloon & NATIVE Photos: Deb Stein Zweers

  9. NO2-Sonde Profiles 11:28 – 12:23 LT 25 Sep 2013 Altitude [m] ABOVE: NOy to 50 ppbv, NO ~10 ppbv NO2 15-30 ppbv AT SURFACE LEFT: NO2 – SONDE, > 40 ppbv Preliminary Data: Deb Stein Zweers NO2 [ppbv], Temp [C]

  10. PSU Native CH4 & CO2: Smith Point ** Pollution event on September 24th & 25th stands out in their timeseries too!!!

  11. PSU Native CH4 & CO2: Smith Point ** Pollution event on September 24th & 25th stands out in their timeseries too!!! GOSAT measured XCH4 on September 25th , but lack of retrievals nearby Smith Point and its ~1400LT crossover time missed the ground enhancement. However, XCH4 was higher North of Smith Point on the 24th (not shown). XCH4 [ppmv]

  12. PSU Native CH4 & 13CH4: Smith Point • CH4 isotopic signature is suggestive of biogenic emissions as source of enhancement. • Background concentrations of CH4 (& < 2.5 ppmv) are mixture of natural gas (-35 to -50%) and biogenic sources (-50 to -70%) making the mean campaign signature to be ~ -55%. • Smith Point seems to be biogenic dominant (as is probably expected) since the background signature found in Dlugokencky et al 2011 was ~-47%. 

  13. CH4 & 13CH4: Pollution Event vs. Entire Campaign • Intercept (-59%) for scatter plot (13CH4 vs 1/CH4) shows source of the >2.5 ppmv enhancements on 24-25 Sep. likely wetland (biogenic) emissions.  • Most CH4 < 2.5 ppmv originates from sources NW of Smith Point during campaign (greater Houston) • Enhancements on the 24th & 25th > 3.0 ppmv from the Northeast (wetlands/rice paddies?)

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