Geographia Polonica (2016) vol. 89, iss. 1, pp. 65-77 | Full text
In order to recognise the variability of the snow avalanche danger in the Tatra Mountains, the danger levels on consecutive days with snow cover over the last nine decades were calculated. To accomplish this task, the longest series of meteorological data were used from the Tatras along with an empirical method for determining the regional avalanche danger on the basis of elementary meteorological data. The results point to the fact that over the last 25 years the number of days with a level 2 avalanche danger significantly decreased, whereas the number of days with level 1 increased. This should result in a decreasing trend in the incidence of small and medium-sized natural avalanches. In the structure of snow cover, the percentage of melt forms might increase. However, this should not correlate with a significant increase in wet-snow avalanches, because the number of days with wet snow also reduces. The contemporary changes in the snow conditions and avalanche danger in the subalpine belt of the Tatras have been primarily associated with an increase in the air temperature (shorter winters and less snow).
Zofia Rączkowska [email@example.com], Institute of Geography and Spatial Organization Polish Academy of Sciences, 31-018 Krakow, Sw. Jana 22, Poland
Geographia Polonica (2008) vol. 81, iss. 1, pp. 41-52 | Full text
This paper attempts to determine the relationship between multi-annual variability of airtemperature, precipitation and wind velocity, and changes in the front limits of the perennialfirn-ice forms (glacierets) developing under different topographic conditions. Problems with thepalaeoclimatic interpretation of their internal structure are also discussed. The obtained resultsattest to the fact that fluctuations in firn-ice patches in the Tatras are probably most connectedwith the weather regimes in winter seasons. Similar changes of individual forms depend on theirsimilarity in terms of type of snow accumulation and the altitude at which they are located.