Analysis

Overview
The IWDW provides analysis products for its AQ modeling platforms. The analysis products and tool available on the IWDW focus on model performance evaluation (MPE) for WAQS modeling platforms, but also include model sensitivity analyses using WAQS modeling and assessments of the ambient monitoring network in the WAQS region.
Contents
  1. WAQS Air Quality Modeling MPE
  2. Model Sensitivity Analysis
  3. Monitoring Network Assessment

WAQS modeling platforms undergo a MPE process that engages WAQS Cooperators. In 2015 WAQS Cooperators, lead by EPA Region 8, drafted a MPE checklist that recommended a series of model evaluation analyses to assist the WAQS Technical Workgroup in determining the adequacy of the PGM platform for use in NEPA and other air quality modeling applications.
The WAQS 2011 modeling platforms were used to perform analyses to determine CAMx sensitivity to boundary conditions from MOZART and GEOS-Chem global models. Another CMAx sensitivity analysis was performed to determine model sensitivity to wintertime meteorology, specifically snow cover albedo. Resutls and analyses for the respective sensitivity analyses are provided below.
The WAQS preforms periodic assessments of the ambient monitoring network in the WAQS region. The wiki below has materials for Monitoring Network Assessments conducted by the WAQS and its predecessor study, the 3SAQS. The 2014 3SAQS Assessment evaluated the status of ambient air quality monitoring in Colorado, Wyoming and Utah. The 2017 WAQS Assessment expanded the geographical region of the Three State Study to seven states by adding New Mexico, Montana, North Dakota and South Dakota. Final reports, supplemental materials, and meeting archives for the 3SAQS and WAQS Assessments are available on the Monitoring Network Assessment wiki.