Wieloletnia zmiennosc wilgotnosci wzglednej powietrza w Lesnym Zakladzie Doswiadczalnym w Krynicy Zdroju

The aim of this study is the analysis of multiannual changeability of air relative humidity in Forest Experimental Station in Krynica Zdrój. The data comes from measurements from 1971­2006, which were collected at the Phytoclimatic Research Station of the Department of Forest Climatology in Mochnaczka Wyzna (718 m a.s.l.) and meteorological station in Krynica Zdrój health resort (580 m a.s.l.) also Jaworzyna Krynicka summit (1113 m a.s.l.). The long-term mean annual air relative humidity was 84.9% with deviation of 2.4%. The highest long-term mean monthly sum of the air relative humidity falls to December (92.5%), and the lowest falls to May: 76.8%. The air relative humidity trend index has totaled -6.1% in multiannual 1971-2006. Five-year forecast has exerted negative trend of air relative humidity on Forest Experimental Station in Krynica Zdrój.