WRAP/WAQS Regional Haze Modeling Scenarios' Specification Sheets

Note: Scenarios are based on modifications to the WRAP/WAQS 2014v2 scenario data, with associated future projections.

October 14, 2020 update: Listed below are current technical descriptions of Regional Haze modeling. These Modeling Scenario Specification Sheets define modeling simulations conducted using the Western Regional Air Partnership (WRAP)/Western Air Quality Study (WAQS) Regional Haze photochemical grid modeling platform:

Modeling Scenarios for Estimating Reasonable Progress Goals

  • Representative Baseline v2 and 2028OTBa2: Representative Baseline emissions scenario version 2 represents emissions from the 2014-2018 period as updated in Sept. 2020 using corrected point source data from the WESTAR-WRAP states and described in the linked memo. RepBase2 was then modeled, and includes representative fire emissions developed by the Fire and Smoke Work Group (FSWG). Two 2028 On-the-Books emissions scenarios were also developed and modeled. Scenario 2028OTBa2 was updated in Sept. 2020 and modeled using corrected point source data from the WESTAR-WRAP states and also applied the FSWG representative baseline fire emissions. Scenario 2028OTBb uses the 2014 actual fire emissions, is not discussed in the linked memo, and there are no plans to re-model the scenario as of September 2020. The purpose of RepBase2 and 2028OTBa2 are the source of data results to provide visibility projection estimates of Reasonable Progress Goals for use in Regional Haze planning in the WESTAR-WRAP region. Those results appear on the TSS Modeling Tools.
  • Dynamic Evaluation 2002 Simulation: The 2014v2 U.S. anthropogenic emissions are being backcast to 2002 and a CAMx 2002 simulation conducted in order to compare modeled and observed changes in visibility between the 2000-2004 Baseline and the 2014-2018 5-year planning periods.

Source Apportionment and Sector Contribution Modeling