**About the Editors**

**Polona Vreˇca** received her Ph.D. degree in Geology from the University of Ljubljana, Ljubljana, Slovenia, in 2000. She is an isotope geochemist working as a senior researcher in the Department of Environmental Sciences of the Jozef Stefan Institute (IJS), Ljubljana, Slovenia. Her expertise ˇ comprises the use of stable isotopes of C, N, O and H as tracers of environmental changes, particularly in the geochemical investigations of lake sediments and water cycle. Her current research focus is mainly on the use of H and O isotopes of water molecules in investigations of the water cycle with an emphasis on precipitation–surface water–groundwater interactions. She is actively involved in the development of the Slovenian Network of Isotopes in Precipitation—SLONIP (https://slonip.ijs.si/) and cooperates with different researchers worldwide within the framework of national and international projects.

**Zolt´an Kern** graduated as a teacher of geography and mathematics at the Eotv ¨ os University, ¨ Budapest, Hungary, in 2001, and completed his Ph.D. in Earth Sciences in 2010. His research interest is focused on climate and environmental changes in the recent geological past. He has research experience in dendroclimatology, dendrochemistry, environmental isotopes, cave ice, time series analysis, and geomorphology. He has been working for the Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences (and its predecessors under the aegis of the Hungarian Academy of Sciences) since 2007 and leading the 2ka Paleoclimate Research Group (https://paleoclimate2ka.hu/?lang=en) there since 2012.
