title: Discrimination of ionic pollutants except condensation nuclei of acid fog using an ultrasonic humidifier.
abstract: Fog droplets in the atmosphere are first produced by the activation of cloud condensation nuclei (CCN), which are originally some ionic compound. Subsequently, the nuclei grow by vapor diffusion. Fog droplets are polluted through the activation process and successive diffusion growth and residence (post activation). We cannot distinguish the effects of the two pollution processes of natural fog water samples. We found that fog droplets can be produced artificially without CCN using an ultrasonic humidifier. Because the artificial fog droplets are not polluted by CCN, the movement of the fog droplets in natural air will take up some pollutants in the air. Consequently, the two pollution processes of fog (the activation of CCN and the post activation process) can be discriminated using data from field experiments. This sampling analytical method is extremely important for further research regarding fog, clouds and environmental chemistry.
authors.affiliation: Faculty of Engineering and Resource Science, Akita University, Tegata Gakuencho, Akita, Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Yoshimura
authors.forename: Ryoei
authors.initials: R
authors.lastname: Kikuchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kimoto
authors.forename: Toru
authors.initials: T
authors.lastname: Ozeki
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Imano
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kajikawa
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Ogawa