Correlation Between Urban Early Ozone Minimum And Solar Radiation
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J.C. Guerra, S. Rodriguez, J.P. Diaz & A. Diaz.
The surface ozone concentration measured in urban and semiurban atmospheres shows in its daily pattern an early morning minimum and an afternoon maximum. In some cases, it can be observed a second minimum after sunset. These variations can be attributed to the daily pattern of other pollutants. After the first minimum in Og daily variation, the increment of ozone concentration can be attributed to photochemical formation and to the transport from the higher layer, when the boundary layer is raised. In all cases the driver of both process is the solar radiation, therefore it should be a direct relation between them. We have find in our preliminary studies that the early morning ozone minimum has a seasonal variation