1 / 18

Comparing Modal and Sectional Approaches in Modeling Particulate Matter in Northern California

Comparing Modal and Sectional Approaches in Modeling Particulate Matter in Northern California. K. Max Zhang 1 , Jinyou Liang 2 , Anthony S. Wexler 1 and Ajith Kaduwela 1,2. 1. University of California at Davis 2. California Air Resources Board. The CRPAQS EPISODE.

matsu
Download Presentation

Comparing Modal and Sectional Approaches in Modeling Particulate Matter in Northern California

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. Comparing Modal and Sectional Approaches in Modeling Particulate Matter in Northern California K. Max Zhang1, Jinyou Liang2, Anthony S. Wexler1 and Ajith Kaduwela1,2 1. University of California at Davis 2. California Air Resources Board

  2. The CRPAQS EPISODE • Domain covers Northern and Central California • An extended winter episode (12/25/2000-1/7/2001) • Spinning up from 12/17/2000-12/24/2000 • Analysis from 12/25/2000 – 1/7/2001 • 185X185X15 with 4km by 4 km grid cell

  3. Anchor Sites • BAC: Bakersfield (Urban) • FSF: Fresno (Urban) • ANGI: Angiola (Rural)

  4. AJITH KADUWELA PRESENTS PARTICULATE MATTER MODELING IN NORTHERN CALIFORNIA TIME: 4:00 PM, Wednesday, September 28 LOCATION: Grumman Auditorium

  5. CMAQ-UCD vs. CMAQ

  6. Gas-phase Species (BAC)

  7. Gas-phase Species (ANGI)

  8. Gas-phase Species O3: CMAQ - CMAQ-UCD

  9. NH3 (g) and HNO3(g)

  10. Primary Particulate Species OC: CMAQ - CMAQ-UCD

  11. Primary Particulate Species

  12. Secondary Particulate Species NO3: CMAQ - CMAQ-UCD

  13. Secondary Particulate Species NO3: CMAQ - CMAQ-UCD

  14. Jan 2 Jan 2 Secondary Particulate Species

  15. Jan 2 Jan 3 Jan 3 Dec 25 Dec 25 Jan 3 Jan 3 Jan 2 Dec 25 Dec 25 Secondary Particulate Species

  16. Secondary Particulate Species

  17. Summary • Comparison between CMAQ and CMAQ-UCD at urban sites shows that gas and particle phases were close to equilibrium during CRPAQS. • CMAQ model is competent for SIP simulations but phase-equilibrium may not hold in future less-polluted scenarios. • Comparing sectional and modal approaches at rural sites poses challenges. • CMAQ-UCD predicted less NO3 and NH4 on Dec 25, Jan 2 and Jan 3. N2O5?

  18. Acknowledgement • California Air Resources Board • San Joaquin Valley Air Pollution Control District

More Related