Aerosol deposition and behavior on leaves in cool-temperate deciduous forests, 1; A Preliminary study of the effect of fog deposition on behavior of particles deposited on the leaf surfaces by microscopic observation and leaf-washing technique

Watanabe, Yoko*; Yamaguchi, Takashi*; Katata, Genki; Noguchi, Izumi*

SEM-EDX analysis was performed using birch leaves collected from urban area and suburb area in northern Japan. Collected leaves were divided into three treatments: (1) untreated, (2) wash leaf surface (adaxial side) with deionized water, and (3) wipe leaf surface with Kimwipes. In untreated samples, many various-shaped particles including soil particles and organic debris were deposited on the surface. Sulfur (S) particles were observed on the surface of samples collected from urban area. After treatments of (2), soil particles and S particles were washed off by water, although coarse particles still remained on the leaf surface. Although treatment of (3) removed almost all particles from surface, NaCl particles were found in both urban area and suburb area. Our study revealed that the behavior of particles depends on environmental conditions such as rain.