1 / 36

SULFATE IN HONG KONG

SULFATE IN HONG KONG. Thu, 30 Oct 2003 2:15pm @Tung Chung: RSP 113 m g/m 3 FSP 83 m g/m 3. Fri, 31 Oct 2003 2:15pm @Tung Chung: RSP 129 m g/m 3 FSP 98 m g/m 3. R. Kwok, J. Fung, A. Lau Hong Kong University of Science & Technology J.S. Fu University of Tennessee at Knoxville

wayne
Download Presentation

SULFATE IN HONG KONG

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. SULFATE IN HONG KONG Thu, 30 Oct 2003 2:15pm @Tung Chung: RSP 113 mg/m3 FSP 83 mg/m3 Fri, 31 Oct 2003 2:15pm @Tung Chung: RSP 129 mg/m3 FSP 98 mg/m3 R. Kwok, J. Fung, A. Lau Hong Kong University of Science & Technology J.S. Fu University of Tennessee at Knoxville Z. Wang and G. Tonnesen U C Riverside October 2008 Sat, 01 Nov 2003 2:15pm @Tung Chung: RSP 190 mg/m3 FSP 148 mg/m3 Sun, 02 Nov 2003 2:15pm @Tung Chung: RSP 342 mg/m3 FSP 295 mg/m3

  2. Pearl River Delta(PRD) Hong Kong

  3. Monthly number of days with ( Visibility reporting < 8km & RH < 80% ) Visibility Report (11/1976 – 6/2004) Days / month Year

  4. Visibility impairment associates with particulate matter (PM) level • Sulfate takes up 30% of total PM concentration Total PM10: 43.9 ug/m3

  5. Questions • How much Hong Kong SO2, SO4 and EC are contributed from Hong Kong, PRD and beyond? • What are the major source types affecting Hong Kong SO2, SO4 and EC levels? Where from? • How do the pollutant levels vary from season to season?

  6. MODELING SYSTEM MM5 v3.6 CMAQ v4.6 SMOKE 2.1

  7. Nested Domains D1 to D4 (from 40.5km to 1.5km)

  8. Meteorological model (MM5 v3.6) Physics Module • Long Wave Radiation option: RRTM scheme • Moisture option: Simple ice scheme • Surface Layer option: Monin-Obukhov scheme • Land Surface option: Noah land-surface model • Planetary boundary layer option: MRF scheme • Cumulus option: Grell scheme

  9. Comparison betweenMM5and observation

  10. HK prevailing background wind directions 2004 January April July October

  11. EMISSIONS PRD SMOKEintoTRACE-P+BiogenicsSMOKE onMODIS

  12. CMAQ 4.6 options • yamo advection • eddy vertical diffusion • CBIV mechanism • AE4 aerosol module • Aqueous chemistry

  13. Obs-sim comparison • January, April, July, October 2004

  14. January April SULFATE No observations Yuen Long, hourly observations July October

  15. January April SO2 Yuen Long, hourly observations July October

  16. January April OC OC EC EC Yuen Long, six-daily sampled meas. July October OC OC EC EC

  17. A Way of Looking at Sulfate in Hong Kong....... Tagged Species Source Apportionment (TSSA) Developed by UC Riverside Modified CMAQ 4.5 with yamo and AE3

  18. Tagged Species Source Apportionment • Tag species of interest in every region and every emission type. • Each grid cell records species concentrations from each tag. SrcA, Region1 SO2 SrcB, Region3 SO2 (I,J-1) (I,J+1) (I,J) SrcC from Region1 SrcB from Region3 SrcA from Region1

  19. Species to tag: SO2, SO4, EC Require to split • Emission categories • Emission regions

  20. 5 Emission Categories • Point Source (Mostly Power Plants) PT • Marine Source (Local Ferry, Riverboat, Ocean-going ships) OF • Industrial Source AR • On-road Moving Vehicular Source MV • Other Anthropogenic/Biogenic Source FW

  21. SO2 Emis Point Marine Indust. Others On-road

  22. Apart from Emission Categories.... Also Need to TagNon-emission contributors..... InitialandBoundaryConditions

  23. 14 Emission Regions 1 2

  24. SO2 in Hong Kong BCON HK

  25. SO2 Power Plants

  26. SO2 Marine Sources

  27. Sulfate in Hong Kong BCON HK

  28. Sulfate Power Plants

  29. Sulfate Marine Sources

  30. EC in Hong Kong BCON HK

  31. EC Mobile Sources

  32. Summary – HK SO2 Point sources from Hong Kong and Shenzhen Marine sources from HK, PRD waters, Shenzhen

  33. Summary – HK Sulfate Point sources from Hong Kong and Shenzhen Marine sources from HK, PRD waters, Shenzhen

  34. Summary – HK Elemental Carbon Vehicle sources from Hong Kong and Shenzhen

  35. Further Work • Apply TSSA to a bigger grid covering Guangdong • Find out the extent of super-regional effects • Decide emission control strategy based on TSSA results

  36. ACKNOWLEDGMENT • University Grant Committee of Hong Kong RTG08/09.SC001 • University Grant Committee of Hong Kong RGC612807

More Related