1. Institute of Physics, Center for Science and Education, Silesian University of Technology , Konarskiego 22B str., 44-100 Gliwice , Poland
2. Institute of Geography and Regional Development, University of Wrocław , Pl. Uniwersytecki 1, 50-137 Wrocław , Poland
3. Department of Geophysics, Institute of Oceanography, University of Gdansk , al. Piłsudskiego 46, 81-378 Gdynia , Poland
4. Institute of Earth and Environmental Sciences, Maria Curie-Skłodowska University in Lublin , Kraśnicka 2cd, 20-718 , Lublin , Poland