Bogdan Gądek

Articles

Variability of the snow avalanche danger in the Tatra Mountains during the past nine decades

Bogdan Gądek, Mariusz Grabiec, Zofia Rączkowska, Andrzej Maciata

Geographia Polonica (2016) vol. 89, iss. 1, pp. 65-77 | Full text
doi: https://doi.org/10.7163/GPol.0046

Further information

Abstract:

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).

Keywords: snow avalanche, avalanche danger, climate danger, the Tatra Mountains

Zofia Rączkowska [raczk@zg.pan.krakow.pl], Institute of Geography and Spatial Organization Polish Academy of Sciences, 31-018 Krakow, Sw. Jana 22, Poland

The Problem of Firn-ice Patches in the Polish Tatras as an Indicator of Climatic Fluctuations

Bogdan Gądek

Geographia Polonica (2008) vol. 81, iss. 1, pp. 41-52 | Full text

Further information

Abstract:

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.

Keywords: glacierets, cryospheric indicators of climate change, Tatra Mts.