Cloud Water Deposition to Forest Canopies of Cryptomeria Japonica at Mt.Rokko, Kobe, Japan
Source: Water, Air, and Soil Pollution, Volume 130, Numbers 1-4, August 2001 , pp. 601-606(6)
Abstract:Cloud water deposition to canopies of Cryptomeria japonica at Mt.Rokko, Kobe, Japan, was estimated from throughfall measurements and fog water collections carried out during a full year. Annual cloud frequency was 11.5–15.5% and liquid water content (LWC) was 0.059 g/m^3. Since cloud water deposition on to forest canopies was significantly correlated with the amount of fog water collected, the former parameter could be quantitatively derived from throughfall measurements. Annual cloud water deposition on to Cryptomeria canopies was 1420–2860 mm (Av. 2140 mm), corresponding to 90–180% (Av. 122%) of annual rainfall. The rate of deposition was higher at the mountain ridge and the forest edge than at the mountain side and the forest interior. Annual deposition of SO_4^2−, NO_3^−, H^+ and NH_4^+ from cloud water was estimated as 204, 153, 2.5 and 58 kg/ha, respectively, equivalent to 5.8–11.7 times the corresponding deposition via rain. The values are equal to, or exceed, the maximum deposition reported for Appalachian forests in the eastern United States. Multiple regression analyses indicate that cloud water deposition on to Cryptomeria canopies was significantly correlated with the following three parameters: cloud frequency, LWC, and wind speed. Thus, these three factors apparently control cloud water deposition on to forest canopies.
Document Type: Regular Paper
Affiliations: 1: The Hyogo Prefectural Institute of Environmental Science, 3-1-27 Yukihira-cho, Suma-ku, Kobe, 654-0037, Japan e-mail: firstname.lastname@example.org 2: The Hyogo Prefectural Institute of Environmental Science, 3-1-27 Yukihira-cho, Suma-ku, Kobe, 654-0037, Japan
Publication date: August 2001