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Solar eclipse: lidar, meteorological, and ozone measurements in the PBL over Bulgaria

The observations were carried out on August 11, 1999, during the solar eclipse over Bulgaria, using a lidar, an ozone meter, and ground meteorological stations. The lidar was used to measure the height of the mixing layer, in particular, before, during and after the solar eclipse in the Sofia city. The ozonemeter measured the ground ozone concentration during the phenomenon. The ground meteorological stations took the meteorological parameters of the atmopsheric ground layer. The weather conditions in all the regions (Sofia, Shabla, Ahtopol, and Peak Rozhen) were favourable for observation. The data of the three types of measurements demonstrate with certainty that the solar eclipse affects the meteorological parameters of the atmosphere near the ground, the ozone concentration, and the height of the mixing layer. It was found out that a certain time delay exists of the solar eclipse impact on the meteorological parameters, the ozone concentration and the mixing layer height, which was different for the different parameters.