Phenomena controlling the ozone budget over Europe. Results of the LOTOS project.
conference paper
In the European LOTOS-LOng Term Ozone Simulation-project, modelling studies and eva luation of ambient measurements have been performed in an attempt to determine the basic phenomena controlling the ozone budget in the atmospheric boundary layer over Europe. Model evaluation studies have been performed by analyzing the model results in connection with the model input like wind speed and direction in a similar manner as the concentrations measured. Sensitivity runs have been performed on several aspects. The concentrations of ozone and precursors in the free troposphere have a distinct effect on maximum hourly ozone levels at the surface, and an even more pronounced effect on aver aged ozone levels. The model calculations show that there are different regimes with respect to photochemical oxidant formation in Europe. North-West and parts of central Europe are in a VOC-limited regime, whereas the north and large parts of southern Europe are in a NO,-limited regime. The amount of biogenic VOC-emissions has a clear effect on the absolute level of O3-calculated, but a small influence on the results of emission reduction calculations
TNO Identifier
289414
Publisher
TNO Enviromental and Energy Research
Source title
Paper preseented at the International Conference on Regional Photochemical Measurement and Modelling Studies, San Diego, USA, November 8-12, 1993
Collation
11 p.
Place of publication
Delft
Pages
1-11
Files
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