This complexity of the atmosphere makes it is necessary to apply computer models in order to understand the natural behavior of the atmosphere including meteorological, chemical and biological processes. A computer model is a miniature representation of all relevant atmospheric processes and in addition to the chemical and physical processes it requires detailed information on the emission, deposition and transport of trace constituents. Importance of models for science. Atmospheric chemical modeling is even more important for understanding the impact of air pollutant emissions on the chemical composition of the atmosphere and the consequences on the environment, e.g. changes in the concentrations of tropospheric ozone and toxic compounds as well as changes in regional acid deposition and the regional and global climate. The study of urban and regional ozone and other toxic air pollutants is extremely important because of the effects on public health and the natural environment.
Climate change has many possible adverse effects on health, the economy and agriculture.
Atmospheric chemistry models are necessary for clarifying efficient and cost effective abatement strategies to minimize the ecological effects of air pollution. As such the atmospheric chemistry models support the interests of the local and national government, industry and the international community. Importance for industry and government. Models validated though extensive testing are extremely valuable for use by industry and government for planning purposes. Atmospheric models can simulate the effects of proposed regulations or new air pollution control approaches upon air quality.