1. Czech Geological Survey, Geologicka
6, 152 00 Prague
5, Czech Republic
2. Global
Change Research Centre, Academy of Sciences of the Czech Republic, Belidla 986/4a, 60300 Brno, Czech Republic
3. Institute
of Information Theory and Automation, Czech Academy of Sciences, Pod Vodarenskou Vezi 4, 182 00 Prague 8, Czech Republic