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EN
The work presents the occurrence of snow cover in the western part of the Western Beskids in the years 1991–2020. We have analysed data from climate research stations of the IMGW-PIB located in Brenna, Laliki, Zawoja, Radziechowy (1991–2007)/Nowy Dwór (2008–2020). We calculated the number of days with snow cover for each winter seasons, the number of days with permanent snow cover, the potential duration of snow cover and the sum of seasonal snow cover thicknesses. The snowiness classes of Chrzanowski winters and the snowiness index of Paczos were determined from the sums of the thickness of the snow cover. The snowiest season was the 2005/06 winter season, while the thinnest snow cover was observed in the 2013/14 season. There are clear relationships between the height above sea level and the time of snow cover occurrence, as well as its thickness.
EN
This study aims to identify the extent of mountain glacier influence on air temperature in the vertical profile, using the Engabreen glacier (Norway) as an example. An important aspect of the work is also an analysis of the variation in surface temperature and wind conditions in the valley of the Engabreen glacier. The analysis was carried out based on measurement data of vertical air temperature taken over the glacier cavity with sensors mounted to an unmanned aerial vehicle. The field survey was carried out on 25 July 2022 in the afternoon. The results of the measurements may indicate that the presence of the glacier reduces the air temperature gradient with altitude compared to the surrounding areas. Above the glacier, the air temperature in the vertical profile increases with height. Based on the profiles taken above the glacier, it was concluded that the surface of the glacier influences the air temperature above it up to an altitude of 37–53 m above ground level.
EN
The subject of the study is a comprehensive qualitative and quantitative analysis of the type of cloud cover over Poland in 1996–2020. The analysis was based on the characteristics of particular types of clouds at three levels, based on hourly measurement data from 36 meteorological stations (IMWM-NRI). The variability of the share of cloud types was analysed on three levels in the multi-annual, annual and daily course. Maps of spatial distribution for selected clouds were plotted. In the study of the multi-year period, clouds of the low-level were observed most frequently, and the most numerous cloud type was Stratocumulus. Altocumulus clouds were found to have the highest frequency on the mid-level, while Cirrus clouds of various species were found on the high-level. On the low-level, the highest increase in the share in the analysed multi-year period was recorded for Stratocumulus clouds, and the highest decrease for moderately and strongly uplifted Cumulus clouds. On the mid-level, the largest increase in the share was observed for Altocumulus clouds, and the largest decrease for Nimbostratus clouds. Among the clouds of the high-level, the greatest increase in the proportion of Cirrostratus clouds not stretching the sky was observed, while the greatest decrease in the share was for the Cirrus uncinus clouds. The annual and daily courses on all the levels showed cyclic occurrence, meaning that the different types of clouds have characteristic periods when they are observed more or less frequently, both on an annual and daily basis.  
EN
The subject of the paper is an analysis of the type of clouds in Poland in 1996–2020 on the low, middle and high levels. Daily data on cloud types and the cloudiness of the low-level from 36 IMWM-NRI stations were used. In the analysed multi-year period, the highest share of low-level clouds was observed (56%), followed by mid-level clouds (23%), and the lowest share of high-level clouds (21%). There was a slight decrease in the share of low-level clouds, and an increase in the share of middle and high levels clouds in the analysed period. The share of low-level clouds was highest in the cool season and during the afternoon and night hours; it was lowest in the summer, and early morning and evening hours. The middle and high levels had the highest share in the summer and during the early evening and early morning hours. These levels were least frequent in the winter, and around noon for the mid-level, and at night for the high-level. The Cumulus humilis and Stratocumulus cugen clouds were most frequently observed on the low-level during low cloudiness. Stratus fractus and Cumulonimbus capillatus were most frequently observed during total and high cloudiness on the low-level. In the warm season and the daytime, clouds are more isolated; in the cool season, they form more dense cloud layers.
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