Aerosol deposition and behavior on leaves in cool-temperate deciduous forests, 2; Characteristics of fog water chemistry and fog deposition in northern Japan, in 2010

Yamaguchi, Takashi*; Noguchi, Izumi*; Watanabe, Yoko*; Katata, Genki; Sato, Haruna*; Hara, Hiroshi*

Fog water chemistry was measured and the fog water deposition rate was estimated by a throughfall method at Lake Mashu, northern Japan, from May to November, 2010. NH and SO were the most abundant cation and anion, respectively. The fog water pH ranged from 4.2 to 6.4 (mean value: 5.1). The [NH]/[SO] equivalent ratio in fog water was more than 1.0 throughout the measuring period, indicating that NH was the major factor in the neutralization of fog water. The estimated fog water deposition rate and fog water deposition were 0.110.22 mm h and 117.0 mm, respectively. The estimated seasonal deposition of nitrogen in fog water, 26.1 meq m, was considerable amount compared to that of reported nitrogen deposition in rainfall.