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This page describes how IWDW-WAQS modeling platforms are organized, their potential application to IWDW user initiated modeling studies, how to request modeling platform data from the IWDW, and how to use IWDW resources to download and explore air quality monitoring data and WAQS modeling platforms.

WAQS Modeling Platforms

The WAQS modeling group develops air quality modeling platforms to support air resource planning in the intermountain west. Project sponsored modeling studies are conducted with oversight and review by IWDW-WAQS Project Cooperators, and are distributed in components that facilitate user initiated modeling studies.

Modeling Platform Components

IWDW-WAQS Modeling platforms include modeling software, meteorology, emissions, and photochemical grid model (PGM) components. Meteorology components include WRF-ARW output and model ready meteorology inputs for CAMx and CMAQ air quality models. Emissions components include annual emissions inventories based on EPA’s National Emissions Inventory (NEI), and model-ready inputs prepared by SMOKE. Air quality modeling components include boundary conditions and other inputs required to run CAMx and CMAQ. WAQS refinements include updates to Oil and Gas and other emission sectors in the intermountain west; meteorology enhancements that improve wintertime ozone predictions; and improvements to ozone and PM modeling based on boundary condition and on-road mobile emissions sensitivity studies. See the Modeling Studies page for details on specific WAQS platform based modeling scenarios.

Modeling Platforms to Facilitate Air Resource Planning

IWDW-WAQS modeling platforms include both base year and future year model inputs and PGM simulations. The future case scenario differs from the base year only in projections of anthropogenic emissions; meteorology and natural emissions, including fires, are held constant from the base to future year. Users who want to use IWDW-WAQS modeling platforms to conduct their own modeling studies can modify emissions for specific source-sectors to estimate impacts of proposed projects, or proposed emissions reduction scenarios. Additionally, IWDW future case modeling scenarios can be used "as-is" to represent "no-action" scenarios that retain future representativeness of anticipated emissions changes.

Request IWDW Modeling Platforms

The modeling platform data request page, available from the "Request Modeling Data Platforms" link on the IWDW Data page, provides detailed descriptions of IWDW-WAQS modeling platforms, and allows users to submit requests for WAQS modeling platform data files. The Modeling Studies page provides a high level overview of modeling platforms supported by the IWDW, including studies sponsored by IWDW-WAQS Cooperators and external groups. Users can browse modeling platform contents without initiating a data request using the Modeling Platform Browser page.

IWDW Resources and Tools

The IWDW contains documentation that describes 3SAQS/WAQS modeling platforms, including modeling protocols and model performance evaluation reports. The IWDW also provides tools to visualize meteorology, emissions and air quality modeling components of 3SAQS/WAQS modeling platforms, as well as air quality data from standard monitoring networks and special studies.


The IWDW Data Documents Page contains links to technical reports, monitoring network assessments, and other supporting documentation for the IWDW-WAQS supported data. Project level documents can be found on the Project Documents Page. Additional documentation on 3SAQS/WAQS modeling platforms and the IWDW is available on the IWDW-WAQS Wiki. Links to IWDW resources can be found on the Resources Page.

Visualization Tools

IWDW visualization tools let users to browse, analyze, and download modeling and ambient air quality monitoring data that are stored in the Data Warehouse. Links to the visualization tools are provided on the Data Page. "Bulk Data" tools allow users to request modeling data and explore and download ambient monitoring data. Emissions tools allow users to explore WAQS emissions inventories, and perform preliminary comparisons of WAQAS base and future case emissions to emissions from proposed projects or emissions reduction scenarios. Modeling data tools allow users to evaluate model performance by comparing modeling results to air quality observations from monitoring networks such as AQS, CASTNet and IMPROVE. Source apportionment modeling results can be browsed via a suite of dynamic visualization tools. See the IWDW Structure Page for descriptions of and links to IWDW visualization tools.

Modified: 9/24/2018 2:05:01 PM