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Air Modeling Research

Researcher studies results from EPA’s Community Multiscale Air Quality Model (CMAQ).Researcher studies results from EPA’s Community Multiscale Air Quality Model (CMAQ).Researchers provide sophisticated models and tools that are widely used to manage air quality across the nation to develop more cost effective and efficient ways to manage air quality. The models are used to provide a forecast of air quality under different regulatory scenarios or strategies to control emissions. Models are also used to predict and characterize exposures for input into health studies.

The research goals include:
  • Develop modeling tools to characterize air quality and predict exposures at local to urban scales, regional to continental scales and global to hemispheric scales.
  • Link air modeling tools with modeling tools for other media (e.g., water) and develop an integrated multimedia modeling system.

Related Tools 

  • Community Multi-Scale Air Quality Model (CMAQ) -- CMAQ is an air quality model and software suite designed to model multiple pollutants at multiple scales. CMAQ allows regulatory agencies and state governments to evaluate the impact of air quality management decisions, and gives scientists the ability to probe, simulate, and understand chemical and physical interactions in the atmosphere.
  • Atmospheric Model Evaluation Tool (AMET) -- AMET) compares model predictions to observed data from various meteorological and air quality observation networks to help evaluate meteorological and air quality simulations. 
  • Visual Environment for Rich Data Interpretation (VERDI) -- VERDI is a flexible, modular, Java-based program for visualizing multivariate gridded meteorology, emissions, and air quality modeling data created by environmental modeling systems such as CMAQ and the Weather Research and Forecasting (WRF) model.
  • GLIMPSE  -- GLIMPSE is a decision support modeling tool being developed by EPA that will assist states with energy and environmental planning through the year 2050. Users of GLIMPSE can explore the impacts of energy technologies and policies on the environment. 
  • Indoor Semi-Volatile Organic Compound (i-SVOC --  i-SVOC Version 1.0 is a general-purpose software application for dynamic modeling of the emission, transport, sorption, and distribution of semi-volatile organic compounds (SVOCs) in indoor environments. i-SVOC supports a variety of uses, including exposure assessment and the evaluation of mitigation options. SVOCs are a diverse group of organic chemicals that can be found in: Many are also present in indoor air, where they tend to bind to interior surfaces and particulate matter (dust).
  • PARAMS Indoor Emissions Source Modeling -- Although over 50 indoor emission source models have been developed (Guo, 2002a), few are widely used in indoor exposure assessment. This imbalance is partially caused by the fact that many source models contain one or more parameters that are difficult to determine. This program is a step toward alleviating this problem by providing 30 methods for estimating some of the parameters in those source models. It is useful to those who develop or use indoor air quality (IAQ) and exposure models, and those who develop or use quantitative structure activity relationship (QSAR) models. In addition, many methods in this program are useful to researchers in areas other than indoor air quality. Users can benefit from this program in two ways: (1) it serves as a handy tool by putting commonly used methods in one place, and (2) it saves users’ time by taking over tedious calculations.
  • SMaRT Search -- This searchable inventory offers freely available models, tools, and databases from EPA's Office of Research and Development. 


  • Science Inventory is a searchable database of journal articles, reports and presentations primarily by the EPA's Office of Research and Development.