Building an effective air quality management system (AQMS) requires a process of continual improvement, and the source apportionment techniques described in this report can contribute in a cost effective manner to improving existing systems or even as the first step to begin an AQMS. This is good news for many developing country cities where the combination of rapid growth, dirty fuels, and old an...

Information on the origin of pollution is an essential element of air quality management that helps identify measures to control air pollution. In this document, we review the most widely used source-apportionment (SA) methods for air quality management. Using simple theoretical examples, we explain the differences between these methods and the circumstances where they give different results and t...

The Forum for Air quality Modeling (FAIRMODE) was launched in 2007 as a joint response initiative of the European Environment Agency (EEA) and the European Commission Joint Research Centre (JRC). The forum is currently chaired by the Joint Research Centre. Its aim is to bring together air quality modelers and users in order to promote and support the harmonized use of models by EU Member States, w...

Fifth generation atmospheric general circulation model (ECHAM5) developed by Max Planck Insitute for Meteorology....

GEOS-Chem is a global 3-D model of atmospheric chemistry driven by meteorological input from the Goddard Earth Observing System (GEOS) of the NASA Global Modeling and Assimilation Office. It is applied by research groups around the world to a wide range of atmospheric composition problems. Scientific direction of the model is provided by the international GEOS-Chem Steering Committee and by Workin...

WRF-Chem is the Weather Research and Forecasting (WRF) model coupled with Chemistry. The development of WRF-Chem is a collaborative effort among the community. NOAA/ESRL scientists are the leaders and caretakers of the code....

CAMx is a state-of-the-science photochemical grid model that comprises a “one-atmosphere” treatment of tropospheric air pollution over spatial scales ranging from neighborhoods to continents. It is an open-source system that is computationally efficient, flexible, and available at zero cost. Meteorological inputs are supplied to CAMx from separate weather prediction models (e.g, WRF). Emission inp...

CMAQ (see-mak): an active open-source development project of the U.S. EPA that consists of a suite of programs for conducting air quality model simulations. CMAQ combines current knowledge in atmospheric science and air quality modeling, multi-processor computing techniques, and an open-source framework to deliver fast, technically sound estimates of ozone, particulates, toxics and acid deposition...

The source allocation products from CAMS are intended to support authorities to identify the origin of exceedances of air quality limit values. CAMS products may be used for the assessment of the long-range transboundary component of an air pollution episode, in regard to anthropogenic emissions. The daily forecasts products present 4-day model forecasts for the main atmospheric pollutants concent...

AERSCREEN is the recommended screening model based on AERMOD. The model will produce estimates of "worst-case" 1-hour concentrations for a single source, without the need for hourly meteorological data, and also includes conversion factors to estimate "worst-case" 3-hour, 8-hour, 24-hour, and annual concentrations. AERSCREEN is intended to produce concentration estimates that are equal to or great...