1 / 16

AMoN Status Update

AMoN Status Update. NADP Spring 2013 Madison, WI . Current AMoN Site Locations. 61 AMoN sites New sites sponsored by NY DEC/NYSERDA: Nick’s Lake, NY (Nov. 2012) Whiteface Mountain, NY (Nov. 2012) New sites sponsored by EPA: Underhill, VT (Nov. 2012)

presta
Download Presentation

AMoN Status Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. AMoN Status Update NADP Spring 2013 Madison, WI

  2. Current AMoN Site Locations • 61 AMoN sites • New sites sponsored by NY DEC/NYSERDA: • Nick’s Lake, NY (Nov. 2012) • Whiteface Mountain, NY (Nov. 2012) • New sites sponsored by EPA: • Underhill, VT (Nov. 2012) • No sites were discontinued in 2012 • Three additional sites in Canada?

  3. Concentrations - 2012

  4. Radiello Deployment • New design for hanging samplers within the rain shelters • New Teflon covered clip • Samplers less likely to fall from shelter • Test from April – July 2013

  5. Travel Blanks *does not include May –August 0.2 Blanks are flagged if NH4+ ion concentration > 0.2 mg/L Fall 2012 meeting: motion passed to ship 1 travel blank every fourth sampling period beginning 1/1/13

  6. Quality Rating Codes for Samples Shipped in Plastic ContainersExample: SC05 • Should samples be invalidated due to the elevated travel blanks? • SAS ARIMA: determine if there is a significant shift in model during May – August 2008 time period for each of the long-term sites. Concentration (µg/m3) Average Model used to fit the data Forced step function

  7. Quality Rating Codes for Samples Shipped in Plastic ContainersExample: WI07 Concentration (µg/m3) No significant shift

  8. ARIMA results Significant shift at 95% confidence limit Based on results of the ARIMA analysis, AMoN samples affected by the plastic shipping bottles will receive a quality rating code = ‘C’. Discussion with QAAG about results and decision to invalidate

  9. Passive Sampler AccuracyRadielloversus Denuder comparison at IL11 • Triplicate denuders deployed at IL11 *January - August 2012 Precision calculated as RPD (%)

  10. IL11 Reduced Major Axis Regression Proposed DQI for AMoN Accuracy: Slope ±20% 2009 - 2012 Radiello= 1.19 x denuder + 0.011 R2 = 0.85 2012* Radiello = 1.35 x denuder – 0.12 R2 = 0.91 *January - August 2012 (QA’ed denuder data not available after August)

  11. Passive Sampler Precision • January 1, 2011 – triplicates shipped to 5% of the network • Proposed precision DQI = 20%

  12. Precision of triplicates by site

  13. Independent Audit Program • 8 sites participated in independent audit program • 2 additional sites scheduled between April - June

  14. Current AMoN Research Areas • ACCS journal article • ORD bi-di study at Duke Forest • CMAQ versus measured bi-directional flux of NH3 using modified MARGA 2-S system • Triplicate AMoN samplers deployed – comparing hourly concentrations to bi-weekly concentrations • Bi-weekly measurements (and CMAQ) show some errors due to diurnal bi-directional flux • MARGA 1-S system collocated at BEL116/MD99 • Bi-weekly AMoN measurements compared to hourly NH3 measurements from MARGA • Input into total deposition map products • Carnegie Mellon using CASTNET and AMoN data to update agricultural emissions model (EPA STAR funding) • Inter-comparison at IL11 • Triplicate ALPHA and Ogawa samplers • Deployed April 2013 • Move all inter-comparison results into AMoN database and post to website

  15. Planned Activities • Collocation study with Pranalytica NH3 analyzer at IL11 (May 2013) • Analyzer is being repaired/calibrated by the manufacturer • NH3 chamber exposure study to verify the manufacturer’s recommended sampling rate • Samples were shipped to ORD laboratory the first week of April • Radiello, ALPHA and Ogawa samplers • AWMA: NADP AMoN: Five Years of Trends (Lehmann)

  16. Prince Edward, VA (PED108/VA24)

More Related