Improved Prediction of Ozone Levels in Urban and Rural Atmospheres |
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| Authors: | J Tidblad A A Mikhailov J Henriksen and V Kucera |
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| Affiliation: | (1) Swedish Corrosion Institute, Stockholm, Sweden;(2) Institute of Physical Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia;(3) Norwegian Institute for Air Research (NILU), Kjeller, Norway |
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| Abstract: | Based on data obtained in terms of the first International cooperative program on the effects of acidic precipitations on materials (ICP Materials) of the United Nations European Commission on Economics (UN ECE), the relations between the ozone O3 and nitrogen dioxide NO2 concentrations in combination with the sunshine effect (taken into account either as the solar radiation (Rad) or the sunshine duration (Sun)) are considered. Analysis based on monthly and annual averages led to a new equation recommended for predicting ozone levels over rural, urban, and industrial areas of Europe as a function of NO2 concentration and Sun parameter. Using Rad instead of Sun provides similar results, but, for practical usage, the equation involving a more easily available parameter Sun was recommended. The new equation corrects and improves the earlier proposed one, in which the concentration of ozone was given as a function of NO2 concentration solely, and is included in the UN ECE Manual on mapping critical loads / levels and geographical areas where they are exceeded. |
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