1 / 18

Canadian Contribution to INTEX-B: Overview of Measurements and Findings

This overview highlights the Canadian contribution to the INTEX-B campaign, including measurements of trace gases, particle physics, particle chemistry, and meteorological parameters. Major findings include the influence of regional and long-range transport events, enhanced sulfate and organic aerosol concentrations, and contributions from Asian emissions and lightning NOx to ozone levels on the West Coast.

sorensenj
Télécharger la présentation

Canadian Contribution to INTEX-B: Overview of Measurements and Findings

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. Overview of the Canadian Contribution to INTEX-B Randall Martin, Aaron van Donkelaar, Thomas Walker, Tom Duck Dalhousie University Richard Leaitch, Anne Marie Macdonald, Kurt Anlauf, Shao-Meng Li, Desiree Toom-Sauntry, John Liggio, Katherine Hayden, Peter Liu, Alexandra Steffen Environment Canada Qi Zhang, SUNY Albany Ian McKendry, Jeff Lundgren University of British ColumbiaMike Cubison, Jose-Luis Jimenez University of Colorado Doug Worsnop, Aerodyne

  2. Whistler Peak (2182 m) • Measurements since 2002: • Trace Gases: O3, CO, Hg (Tekran) • Particle Physics: • Particle distributions from 10nm to 20 μm • TSI SMPS (10 nm to 500 nm), Grimm OPC (400 nm to 20 μm) • Particle Chemistry: • Filter packs (inorganics, OC/EC) • High-Resolution Time-of-Flight AMS (WTOF-AMS) • Moudi impactor samples (inorganics, metals (ICP, XRF)) • Particle Light Scattering and Absorption • Nephelometer, PSAP • Temperature, Dew point, Winds • Indicates additions during the INTEX intensive Anne Marie Macdonald

  3. Whistler Peak: Intensive and Long-Term Measurements CO (ppbv) O3 (ppbv) Anne Marie Macdonald

  4. Long-term Measurements at Whistler Reveal Unusually Large Events During INTEX-B Anne Marie Macdonald

  5. May 14 High-Resolution Time-of-Flight AMSRegional? Organic InfluenceLong-Range Transport Eventof Sulfate GEOS-Chem (2 km) May 15 May 16 Qi Zhang and John Liggio Aaron van Donkelaar SO42- (ug m-3)

  6. Lidar Measurements Show Subsiding Aerosol Plume During Enhanced Sulfate Period Tom Duck

  7. Airborne measurements from a Cessna 207 • 31 project flights • Ozone - all flights • CO - 10 flights • Particle chemistry - 24 flights • (Quad-AMS and single filter for major ions) • Particle number and size - all flights • (CPC, PCASP, FSSP300) • Particle light scattering - all flights • (Radiance nephelometer) Richard Leaitch

  8. Cessna - C130, Whistler Summit Comparison: May 3rd r=0.63 slope=1.79 r=0.88 slope=1.70 r=0.91 slope=1.20 Aaron van Donkelaar and Richard Leaitch

  9. Cessna - C130, Canada-US Border Comparison: May 9th r=0.98 slope=1.28 Aaron van Donkelaar and Richard Leaitch

  10. Profile Often Revealed Enhanced Sulfate Above ~3 km and Enhanced Organic Aerosol Below Richard Leaitch

  11. Sulfate Plume at 2 km, Coincident with Summit Richard Leaitch

  12. Puzzling Organic Enhancement at 4 km Richard Leaitch

  13. Campaign Average Aerosol Profiles AMS measurementsscaled using PCASP size distribution (assume internally mixed) to total mass concentration for comparison with GEOS-Chem Likely an upper limit Sulfate GEOS-Chem Asian SO2 Emissions for 2006 275% increase over 2000 Nitrate Organic Aaron van Donkelaar and Richard Leaitch

  14. April 22-25 Plume: Sulfate Primarily of Asian Origin GEOS-Chem at 675 hPa on April 24 GEOS-Chem AMS scaled (using PCASP) likely an upper limit No Asia Simulations use 2006 Asian emissions East Asian SO42- (ug m-3) SO42- (ug/m3) Aaron van Donkelaar

  15. Sulfate is a Major and Growing Contributor to AOD INTEX-B Average Aerosol Optical Depth MODIS GEOS-Chem (2006 Asian Emissions) % simulated AOD from SO4= GEOS-Chem (2006 Asian Emissions) Aaron van Donkelaar

  16. Asian Emissions and Lightning NOx Contribute to O3 Observed on West Coast Measured GEOS-Chem (2006 emis) GEOS-Chem (No lightning) GEOS-Chem (No Asian NOx) Thomas Walker

  17. Asian and Lightning NOx Emissions Contribute to the OMI Ozone Columns OMI / MLS Tropospheric Residual GEOS-Chem (2006 NOx Emis) Trop O3 (DU) GEOS-Chem (2006 – No Asian NOx) GEOS-Chem (2006 – No Lightning) ΔTrop O3 (DU) Thomas Walker

  18. Posters Richard Leaitch et al., Summary of the Canadian airborne measurements during INTEX-B Anne Marie Macdonald et al., Overview of measurements at Whistler Peak during INTEX-B John Liggio et al., Application of principal component analysis to aerosol mass spectrometry data from a high-elevation site in Whistler, BC Qi Zhang et al., A high-resolution time-of-flight aerosol mass spectrometer study on size-resolved aerosol composition at the peak of Whistler Mountain during INTEX-B Aaron van Donkelaar et al, Long-range transport of Asian sulfur emissions to Canada Thomas Walker et al., Long-range transport of NOy and O3 during INTEX-B: Satellite, aircraft, and model perspectives Funding NSERC Environment Canada

More Related