DISPERSION21

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DISPERSION21 (also called DISPERSION 2.1) is a local scale atmospheric pollution dispersion model developed by the air quality research unit at SMHI, the Swedish Meteorological and Hydrological Institute, located in Norrköping. ^[1][2]

The model is widely used in Sweden by local and regional environmental agencies, various industrial users, consultant services offered by SMHI and for educational purposes.

Contents 1 Features and Capabilities 2 See also 2.1 Air pollution dispersion models 2.2 Others 3 Further reading 4 References 5 External links

[edit] Features and Capabilities

Some of the basic features and capabilities of DISPLAY21 are: ^[3]

• Source types: Multiple point, area , and volume sources as well as street canyons.
• Source releases: Surface, near surface and elevated sources.
• Source locations: Urban or rural locations.
• Plume types: Continuous or intermittent buoyant plumes
• Plume dispersion treatment: Gaussian model treatment using Green's functions and includes multiple reflections.
• Terrain types: Simple terrain with no more than 10 degree slopes.
• Building effects: Building downwash algorithms are included.
• Meteorological data: The model includes a preprocessor to produce the meteorological parameters needed to characterize the atmospheric turbulence as well as to produce wind speed and direction profiles.
• The street canyon module includes some atmospheric chemistry for photochemical reactions.

[edit] See also

[edit] Air pollution dispersion models

• ADMS
• AERMOD
• CALPUFF
• ISC3
• NAME
• PUFF-PLUME
• MERCURE

[edit] Others

• Air pollution dispersion modeling books
• Atmospheric dispersion modeling
• Compilation of air dispersion models
• SMHI (Swedish Meteorological and Hydrological Institute)

[edit] Further reading

For those who are unfamiliar with air pollution dispersion modelling and would like to learn more about the subject, it is suggested that either one of the following books be read:

• Turner, D.B. (1994). Workbook of atmospheric dispersion estimates: an introduction to dispersion modeling, 2nd Edition, CRC Press. ISBN 156670023X. www.crcpress.com

• Beychok, M.R. (2005). Fundamentals Of Stack Gas Dispersion, 4th Edition, self-published. ISBN 0964458802. www.air-dispersion.com

[edit] References

1. ^ Dispersion 2.1 page on SMHI web site
2. ^ Air quality research staff
3. ^ The Model Documententation System (MDS) of the European Topic Centre on Air and Climate Change (part of the European Environment Agency)

[edit] External links

• SMHI web site click on 'Products & Services', then on 'Environment', and then on 'Dispersion'