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2 Acta Agraria et Silvestria. Series Silvestris

2 2006

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w słowach kluczowych: Phytoclimatic Research Station in Kopciowa

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Wilgotnosc wzgledna powietrza na starodrzewiu i na otwartej przestrzeni na stacji fitoklimatycznej na Kopciowej [Beskid Sadecki]

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Durlo G. , Feliksik E. , Wilczynski S.

tom 44

39-52

The aim of this study is the analysis of relative humidity in timber forest and open area at Kopciowa, near Krynica Zdrój in Beskid Sądecki Mountains. The data comes from psychrometric measurements from 1971-1982, which were collected at the Phytoclimatic Research Station of the Department of Forest Climatology. The lowest values of relative humidity were spring, on average 80% on open area and 85% in timber forest. The highest values were autumn, properly 91% on open area and 94% under forest canopy. In all time periods fluctuations of relative humidity they were small in forest. In individual seasons of year and in vegetation period also, the relative humidity was greatest in forest. The biggest differences, on benefit of forest stand, were in spring months (April, May), the smallest differences were in November and December, and they were on average 4%. The differences of relative humidity for decade periods were between 8 and 15%, in pentad periods from 15 to 30% and in individual days they achieved 50% even.

Wplyw lasu [Dentario glandulosae-Fagetum] na ksztaltowanie sie niektorych cech pokrywy snieznej w warunkach gorskich na Kopciowej kolo Krynicy Zdroju

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Feliksik E. , Wilczynski S. , Durlo G.

tom 44

53-65

This study concerns the observations and measurements of snow-cover carried out during the period from 1970 to 1997 in the open area and in the fir-spruce forest at the Station of Phytoclimatic Research at Kopciowa in the Beskid Sądecki Mountains. It was found that the average duration of a stable and compact snow-cover is 118 days in the open area and 126 days in the forest. On the average snow appears on 13 November in the open area, and 7 days later in the forest. It disappears on 23 March from the open area, and nearly 3 weeks later from the forest. In the first half of the winter season the average depth of snow-cover in the forest is only a little smaller than in the open area, and it is characterized by a slightly greater variation. While from mid-February the snow-cover in the open area is thinner, and is much more variable than in the forest.