1. Institute of Food Technology; University of Debrecen; Böszörményi út 138 4032 Debrecen Hungary
2. Isotope Climatology and Environmental Research Centre (ICER); Institute for Nuclear Research, Hungarian Academy of Sciences; Bem tér 18/C 4026 Debrecen Hungary
3. Department of Physical Geography and Geoinformatics; University of Debrecen; Egyetem tér 1 4032 Debrecen Hungary