Air Pollution Modelling at an Urban Scale – Russian Experience and Problems |
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Authors: | E L Genikhovich I G Gracheva R I Onikul E N Filatova |
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Institution: | (1) Department of Monitoring of Air Pollution, Main Geophysical Observatory, 194021 St. Petersburg, Russia |
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Abstract: | Urban concentration fields are extremely inhomogeneous andtheir gradients are very high. It results in specificproblems when modelling air pollution at the urban scalethat are analysed in this paper. Some examples ofmisrepresentation of the urban concentration field,computed with the use of the source-receptor type models,are given here. They can help in understanding the natureof the problems we face and reveal deficiencies of thecomputational technologies in use. Filtering of thecomputed fields is suggested as an instrument for improvingtheir quality. Its efficiency is proved on the test runs.An algorithm for refinement of the filtered fields isintroduced in this paper. |
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Keywords: | air pollution concentration field filtering modelling refinement urban |
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