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MANE-VU states, Virginia and West Virginia Regional Haze Trend Analyses

MANE-VU states, Virginia and West Virginia Regional Haze Trend Analyses. Latest available (December 2011) 2000-2010 IMPROVE DATA (for TSC 5/22/2012). Tom Downs, CCM Chief Meteorologist Maine DEP-BAQ. 20% Best and 20% Worst Visibility Day Deciview Trends.

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MANE-VU states, Virginia and West Virginia Regional Haze Trend Analyses

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  1. MANE-VU states, Virginia and West Virginia Regional Haze Trend Analyses Latest available (December 2011) 2000-2010 IMPROVE DATA (for TSC 5/22/2012) Tom Downs, CCM Chief Meteorologist Maine DEP-BAQ

  2. 20% Best and 20% Worst Visibility Day Deciview Trends • RH data available on the IMPROVE (http://vista.cira.colostate.edu/improve/Data/IMPROVE/summary_data.htm) and VIEWS (http://views.cira.colostate.edu/web/DataWizard/) websites. • Data used in the plots for this presentation is the most recent (December 2011) QA’d data using the new revised IMPROVE algorithm • The following set of plots compare monitored deciview values for the 20% best and worst visibility days with natural background, the Uniform “glide path” to natural conditions for the 20% worst visibility days and the CMAQ modeled 20% worst and best days “glide paths” from the baseline period to 2018.

  3. As states near the mid course review, are deciview levels showing reasonable progress? • For the 20% best visibility days all sites are trending below their “glide path” and many sites are currently significantly below their respective Uniform and CMAQ 2018 “glide path” levels • Visibility during the 20% best visibility days are not degrading

  4. Light Extinction Contribution Trends • The following set of slides show the relative contributions to light extinction for the 20% best and 20% worst visibility days due to the following particles in the atmosphere: • Ammonium sulfate • Ammonium nitrate • Organic mass • Light absorbing carbon • Fine Soil • Sea Salt • Coarse Mass (PM10) • Total particle (PM2.5 and PM10) • Rayleigh scattering

  5. Percent Contribution to Light Extinction

  6. 20% Worst Visibility Days • Current (2006-10) contribution to light extinction due to sulfates continues to dominate (55-78%) at all sites with the highest contribution at sites in Virginia and West Virginia. (note this is down from 60-82% during the 2000-04 baseline period) • Contribution to light extinction organic mass is the second highest at most sites (nitrates at Brigantine) and is not much higher than due to Rayleigh scattering. • Contribution to light extinction from all other particle pollutants is the same or lower than due to Rayleigh scattering at all sites.

  7. 20% Best Visibility Days • Contribution to light extinction due to Rayleigh scattering (56-68%) dominates at all northern sites with sulfates contribution second at 18-24% with organic mass third at 4-9%. • Contribution to light extinction due to sulfates (31-40%) and due to Rayleigh scattering (29-37%) dominate at all southern sites sites with organic mass third at 7-11%.

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