EMEP/CIAM models

EMEP uses the RAINS (Regional Air Pollution Information and Simulation) model for integrated assessment developed and maintained at the Center for Integrated Assessment Modelling (CIAM).

Over the last years the RAINS model has been extended to explore synergies and trade-offs between the control of local and regional air pollution and the mitigation of global greenhouse gas emissions. This new GAINS (Greenhouse Gas and Air Pollution Interactions and Synergies) model assists in the search for pollution control strategies that maximize benefits across all scales.

EMEP Chemical Transport Models

EMEP/MSC-E models

The chemical transport models developed at Meteorological Synthesizing Centre - West (MSC-W) are concerned with the regional atmospheric dispersion and deposition of acidifying and eutrophying compounds (S, N), ground level ozone (O₃) and particulate matter (PM_2.5, PM₁₀).

Until 1998, 2-D Lagrangian Acid Deposition model was routinely used at EMEP/MSC-W. In 1989, the MSC-W of EMEP began the work on the development of an ozone model of adressing both the problem of short-term episodic ozone and long-term (growing season) ozone. The model was called in the beginning the Lagrangian Ozone model and is also known as the Lagrangian Photooxidant model.
In 1997 results from the EMEP Eulerian photooxidant model were presented for the first time. In 1999 3-D Eulerian Acid Deposition Model was applied to calculate air concentration and deposition fields for major acidifying and eutrophying pollutants as well as their long-range transport and fluxes across national boundaries.
Finally in 2002, the Unified EMEP model, was introduced; A modelling system that unified the acidifying and the oxidant versions of the eulerian model.
The Unified EMEP model code (version rv3) was released as open source under the GPL license v3 in February 2008. The release of the code included also a full input data set for 2005 and model results for comparison.
The latest EMEP/MSC-W model v.2011-06 open source code with a full input data set for 2008 and model results for comparison has been available since July 2011.

The EMEP Lagrangian model was not explicitly designed to model particulate matter, but it calculated air concentrations of four secondary particles: sulphate, nitrate, ammonium sulphate and ammonium nitrate. MSC-W was assigned a task to develop the EMEP Eulerian model to calculate the transboundary transport of atmospheric aerosol in collaboration with the other EMEP centres.