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Presentation transcript:

Alternative title slide Evaluation of revised Uniform Rate of progress goalS for western United states Ralph Morris and Ou Nopmongcol, Ramboll Environ Zac Adelman, University of North Carolina Tom Moore, WESTAR/WRAP Control #116 Presented at A&WMA Visibility Conference Jackson Hole, Wyoming September 27-30, 2016 Alternative title slide. Image size: 8 cm x 25,4 cm or 302 x 960 pixels

Content Recent Western Regional Air Partnership (WRAP) Modeling Develop the next generation regional air quality modeling databases for air quality planning in western states 2008 West-wide Jump-Start Air Quality Modeling Study (WestJumpAQMS) 2011 Western Air Quality Study (WAQS) Intermountain West Data Warehouse (IWDW) WAQS 2011 Photochemical Grid Model (PGM) Modeling CAMx/CMAQ PGM Modeling Databases 2011 Model Performance Evaluation 2025 Future-Year Modeling Using WRAP/WAQS/IWDW 2008 and 2011 Modeling Data to Evaluate new Regional Haze Metrics Baseline Worst/Most Impaired 20% Days 2064 Natural Conditions Goal Full slide image with white fact box Full slide image with white fact box

Recent wrap regional modeling studies WRAP WestJumpAQMS Develop CAMx 2008 36/12/4 km platform 2008 Ozone and PM Source Apportionment Western Air Quality Study (WAQS) Develop 2011 CMAQ/CAMx 2011 36/12/4 km platform 2011 ozone and PM Source Apportionment 2011 Clean U.S. Background (USB) Simulations Transfer 2008 and 2011 modeling databases to Intermountain West Data Warehouse (IWDW)

WRAP Western Air Quality Study (WAQS) O3 Goals NMB ≤±15% NME ≤35% 2011 WRF Meteorological Model 2011 CMAQ/CAMx 36/12/4 km Model Performance Evaluation 2025 CMAQ/CAMx 36/12/4 km 2011 O3 & PM Source Apportionment Modeling State-Specific Source Sector-Specific Clean Simulations (USB) PM2.5 MPE @ 31 IMPROVE Sites CAMx NMB = 7.6% NME = 11.3% CMAQ NMB = =0.1% NME = 10.0%

WAQS 2011 State-Specific Source Apportionment Visibility Analysis PSAT PM Source Apportionment 21 Geographic Regions 17 Western States + EUSA Mex, Can, Off-shore Five Source Categories Natural (Bio, LNOx, SS, WBD) Wildfire Prescribed Burns Agricultural Burning Anthropogenic Initial Concentrations Boundary Conditions (CONUS) Same configuration as used in WestJumpAQMS State-Specific PSAR Source Apportionment

Use WAQS PM Source Apportionment data in URP Glide Path Evaluation How to define 2000-2004 Baseline based on measured IMPROVE? W20%; EPA Most Impaired; PSAT W20%; PSAT Most Impaired How to define 2064 Natural Conditions? NCII; EPA guidance; PSAT Uncontrollable; US Background Runs Baseline Natural Conditions

WAQS 2011/2008 Visibility Analysis – Evaluation of Alternative Glide Paths Extract PSAT concentrations results at IMPROVE sites in CONUS domain and apply IMPROVE extinction equation Separate visibility extinction contributions into Controllable and Uncontrollable sources Controllable Sources U.S. Anthropogenic Emissions Uncontrollable Sources: Natural (Biogenic, Lightning NOX, Windblown Dust, Sea Salt, Ocean DMS) Open Land Fires (Wild fires, Prescribed Burns and Agricultural Burning) International Transport Mexico and Canada in CONUS Domain MOZART GCM CONUS Boundary Conditions (BCs)

WAQS 2011/2008 Visibility Analysis – Evaluation of Alternative Glide Paths Apply day-specific and site-specific PSAT modeled Controllable and Uncontrollable extinction fractions to IMPROVE measured extinction by species Use CAMx PSAT day-specific species-specific visibility extinction modeling results in relative fashion to apportionment measured 24- hour IMPROVE data Identify PSAT 20% Most Impaired Days Days with highest U.S. man-made emission contribution Develop Glide Paths from the PSAT Most Impaired Days to Natural Conditions in 2064 What 2064 Natural Conditions should be used, evaluated two approaches: Modeled PSAT Uncontrollable Extinction from Base Case U.S. Background Simulations (no U.S. anthropogenic emissions)

2008 Yellowstone IMPROVE and PSAT 24-hour visibility extinction

Yellowstone -- 2008 PSAT Separate improve extinction into controllable/uncontrollable

2011 Yellowstone IMPROVE and PSAT 24-hour visibility extinction

Yellowstone -- 2011 PSAT Separate improve extinction into controllable/uncontrollable

NATURAL CONDITIONS – USE WAQS Clean U. S. Background (USB) simulations Three CAMx 2011 36 km CONUS simulations with no U.S. anthropogenic emissions using Boundary Conditions (BC) from three different Global Chemistry Models (GCMs): MOZART (MZBC) GEOS-Chem (GCBC) AM3 (AMBC) Compare three USB modeling results with EPA’s 2016 visibility background estimates (2064 goal) Note: EPA Natural Background does not include international anthropogenic emissions but model USB simulations do i.e., includes Mex/Can Anthro in CONUS domain plus Intl Anthro in GCM BCs Need GCM simulations with no global anthropogenic emissions for apple-to- apple comparisons

Comparison of EPA Natural background with model USB estimates

Percent contribution to natural background extinction by species

Conclusions EPA NATURAL vs. model U.S. background comparisons USB much higher SO4 than EPA BCK ~3x MZBC and GCMZ and ~2x AMBC Asia SO2 emissions in USB simulations? USB NO3 lower than EPA Related to higher model USB SO4? USB OMC/OA/OC greater than EPA in summer and less in winter, although average across most impaired days very similar Model has more SOA? Need zero anthropogenic emissions GCM BCs with PGM North American Background (NAB) simulations for direct comparison with EPA Natural Background Zero global anthropogenic emissions

Example Yellowstone Glide Paths and 2025 projections using 4 approaches (more details provided Thursday) W20% EPA Most Impaired PSAT W20% PSAT Most Impaired

Difference between 2025 model and 2025 URP glide path in extinction (mm-1) Yellowstone NP PSAT sees large SO4 from BCs (international) Model NO3 more responsive for Most Impaired vs. W20% days For OMC, model misses some observed WF days using W20% metric Model missing large WBD events in IMPROVE data

Additional talks on visibility glide paths (Baseline/natural) and modeling Wed 11:00 – Conceptual Approach to Address Anthropogenic/Non-Anthropogenic Emissions for More Accurate Glide Path – Ou Nopmongcol, Ramboll Environ Thurs 10:20 – Source Attribution for Visibility Planning using a Regional Photochemical Model – Patricia Brewer, NPS Thurs 10:40 – The Uniform Rate of Progress and Setting Reasonable Progress Goal in Western U.S. Class I federal areas – Gail Tonnesen, EPA Region 8 Thurs 11:00 – Assessment of Contributions to Visibility Impairment in Western United States and Effects of New Guidance for Tracking Visibility Progress – Ralph Morris, Ramboll Environ

Thank you End slide Endslide