Temat: levels of clouds - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Przestrzenna i czasowa zmienność rodzajów chmur nad Polską w latach 1996-2020
Spatial and temporal variability of cloud types over Poland in 1996-2020
Autorzy:: Grajek, Zofia
Dyszy, Wiktoria
Tematy:: cloud genera
cloud species
cloud varieties
levels of clouds
Polska; Pokaż więcej
Wydawca:: Poznańskie Towarzystwo Przyjaciół Nauk
Powiązania:: https://bibliotekanauki.pl/articles/43349426.pdf Link otwiera się w nowym oknie
Opis:: 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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Chmury piętra wysokiego, średniego i niskiego: analiza zachmurzenia w Polsce
High, medium and low clouds: analysis of cloud cover in Poland
Autorzy:: Grajek, Zofia
Dyszy, Wiktoria
Tematy:: types of clouds
levels of cloud height
cloud cover
Polska; Pokaż więcej
Wydawca:: Poznańskie Towarzystwo Przyjaciół Nauk
Powiązania:: https://bibliotekanauki.pl/articles/43349385.pdf Link otwiera się w nowym oknie
Opis:: 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.
Dostawca treści:: Biblioteka Nauki

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