Juraj Hreško
Articles
Ice cover phenology of two high-altitude lakes on the Slovak side of the Tatra Mts. (2016-2024)
Geographia Polonica (2025) vol. 98, iss. 1, pp. 79-95
doi: https://doi.org/10.7163/GPol.0293
Abstract
The first multi-year examination of the phenological phases of lake ice cover in this area utilized a two-source method to address the constraints of this environment. Higher air temperatures impacted the reduction in ice cover duration, while its fluctuation and windiness influenced the occurrence of repeated freeze-thaw events, ultimately extending these periods. The extended duration of ice cover at higher elevation lake (CID +56 days,IP +75 days) can be attributed to later and prolonged break-ups (BUS +48 days, BUE +64 days, BUD +16 days). Studying these factors’ interaction with the lake’s characteristics (such as their morphology and the presenceof flow) and their surroundings (including topography) has enhanced our understanding of the dynamics of this crucial component of the high mountain cryosphere.
Keywords: high mountain cryosphere, lake ice phenomena, optical satellite images, Sentinel-2, webcam images, climatic and local factors
[kristina.hrivnakova@ukf.sk], Department of Ecology and Environmental Sciences, Faculty of Natural Sciences and Informatics Constantine the Philosopher University in Nitra Tr. A. Hlinku 1, 949 01 Nitra: Slovak Republic
, Department of Ecology and Environmental Sciences, Faculty of Natural Sciences and Informatics Constantine the Philosopher University in Nitra Tr. A. Hlinku 1, 949 01 Nitra: Slovak Republic
[jhresko@ukf.sk], Department of Ecology and Environmental Sciences, Faculty of Natural Sciences and Informatics Constantine the Philosopher University in Nitra Tr. A. Hlinku 1, 949 01 Nitra: Slovak Republic
Debris flow activity in the Slovak part of the High Tatras in the light of lichenometric dating
Geographia Polonica (2023) vol. 96, iss. 1, pp. 69-77 | 
Full text
doi: https://doi.org/10.7163/GPol.0246
Abstract
Rock walls and talus slopes, which are the most common features of high-mountain relief, have been researched for many years. Geomorphologists have taken particular interest in debris flows, which play a major role in the development of talus slopes. This paper presents the results of the first lichenometric dating of debris flows on the southern slopes of the Tatra Mountains. The greatest debris flow activity took place in the Little Ice Age and in the last two decades.
Keywords: lichenometric dating, debris flow, High Tatra Mts.
[kedzia@zg.pan.krakow.pl], Institute of Geography and Spatial Organization Polish Academy of Sciences ul. św. Jana 22, 31-018 Kraków: Poland
[jhresko@ukf.sk], Department of Ecology and Environmental Sciences, Faculty of Natural Sciences and Informatics Constantine the Philosopher University in Nitra Tr. A. Hlinku 1, 949 01 Nitra: Slovak Republic
[gbugar@ukf.sk], Department of Ecology and Environmental Sciences, Faculty of Nature Constantine The Philosopher University in Nitra Trieda Andreja Hlinku 1, 949 74 Nitra: Slovakia