| Popis: |
In 1992 the SANA core station was installed at Melpitz near Torgau providing, among other things, vertical profile data of the concentrations of SO2, O3, NO, and NO2, wind speed, dry- and wet-bulb temperatures. Based on the data of July and October 1992, dry deposition fluxes were determined applying a one dimensional diagnostic model of the atmospheric surface layer, where in the case of the triad NO-NO2-O3 the model calculations were carried out with and without chemical reactions to investigate the influence of the latter on dry deposition. The results substantiate that especially in the case of NO and NO2 the vertical profiles of fluxes and, hence, deposition velocities can be strongly affected by chemical reactions leading to larger absolute values of fluxes and deposition velocities. Furthermore, the calculated fluxes also weakly depend on vegetation activity, photosynthetically active radiation as well as on the turbulent mixing of the atmospheric surface layer. |
