Jan Gačnik / Research Associate

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e-mail: jan.gacnik@ijs.si

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Research areas: Environmental science, atmospheric chemistry and pollution, biogeochemical cycling, metrology, and chemical transport modelling. Recent specific research topics include atmospheric mercury chemistry, mercury speciation and isotope analysis, gaseous oxidized mercury calibration, traceable measurement methods, atmospheric monitoring, passive and active sampling approaches, chemical transport modelling of Hg, Cd, Pb and PAHs, biogeochemical cycling of pollutants, environmental metrology, and isotope-based climate and hydrological studies.

Teaching: Assistant Professor at Jožef Stefan International Postgraduate School, study programme Ecotechnology

Selected publications:

  • Gačnik, J., Žagar, K., Hatvani, I.G., Kern, Z., Vreča, P., 2026. Climate change reflected in 40-year isotopic composition trends of precipitation in Slovenia. Environ. Res. 288. https://doi.org/10.1016/j.envres.2025.123286
  • Gačnik, J., Živković, I., Horvat, M., 2025. Mercury isotopes in the atmosphere: Synthesis, perspectives and analytical considerations. TrAC - Trends Anal. Chem. 189. https://doi.org/10.1016/j.trac.2025.118257
  • Gačnik, J., Živković, I., Ribeiro Guevara, S., Kotnik, J., Berisha, S., Vijayakumaran Nair, S., Jurov, A., Cvelbar, U., & Horvat, M. (2022). Calibration Approach for Gaseous Oxidized Mercury Based on Nonthermal Plasma Oxidation of Elemental Mercury. Analytical Chemistry, 94(23), 8234-8240. https://doi.org/10.1021/acs.analchem.2c00260
  • Gačnik, J., Lyman, S., Dunham-Cheatham, S.M., Gustin, M.S. (2024). Limitations and insights regarding atmospheric mercury sampling using gold. Anal. Chim. Acta 1319. https://doi.org/10.1016/j.aca.2024.342956
  • Gačnik, J., Živković, I., Kotnik, J., Božič, D., Tassone, A., Naccarato, A., Pirrone, N., Sprovieri, F., Steffen, A. & Horvat, M. (2024). Comparison of active measurements, lichen biomonitoring, and passive sampling for atmospheric mercury monitoring. Environmental Science and Pollution Research, 31, 35800-35810. https://doi.org/10.1007/s11356-024-33582-6

Selected projects (as PI):

  • AtMoMer - Atmospheric Modelling and chemistry of Mercury: Experimental and computational approaches to understanding atmospheric mercury (RSF-0073, 2026-2028)
  • M-CAT - Mercury Chemistry and Atmospheric Transformations, an Integrated Approach to Air Pollution Research (J1-70023, 2026-2028)