Atmospheric Boundary Layer (ABL) height (h) is one of the basic criteria ‎for describing its structure. ABL measurements, parameters and predictions have ‎numerous practical and theoretical implementations as forecast of pollutant ‎concentrations, surface temperature, expansion of disturbance measurements or ‎in climate models and numerical weather prediction. The height of mixing layer ‎is difficult to be measured; therefore, mathematical methods are introduced to ‎calculate this layer and different FORTRAN programs have been developed to ‎define the height of ABL on hourly basis per year. The analysis of the results ‎showed that the variation of the height of the mixing layer for different seasons ‎depends on the type of the dominant stability class and the value of wind speed, ‎where the rise of the mixing layer in winter and autumn months may be referred ‎to increased frequency of stability conditions in the unstable and slightly ‎unstable atmosphere On the other hand, when the stable conditions are dominant, ‎the height of the mixing layer remains smaller. ‎
The boundary layer ozone is a standard contaminant because of its ‎harmful effects on living organisms and plants. It also has an active role in ‎atmospheric chemistry and climate change; therefore, monthly and seasonal ‎variation of the surface ozone O3 concentration and its effects on the ‎atmospheric boundary layer measured for the first time at coastal site in Egypt at ‎the period 2013.‎