High frequency and large deposition of acid fog on high elevation forest

Manabu Igawa, Ko Matsumura, Hiroshi Okochi

研究成果: Article

38 引用 (Scopus)

抜粋

We have collected and analyzed fogwater on the mountainside of Mt. Oyama (1252 m) in the Tanzawa Mountains of Japan and observed the fog event frequency from the base of the mountain with a video camera. The fog event frequency increased with elevation and was observed to be present 46% of the year at the summit. The water deposition via throughfall increased with elevation because of the increase in fogwater interception and was about twice that via rain at the summit, where the air pollutant deposition via throughfall was several times that via rainwater. The dry deposition and the deposition via fogwater were dominant factors in the total ion deposition at high elevation sites. In a fog event, nitric acid, the major acid component on the mountain, is formed during the transport of the air mass from the base of the mountain along the mountainside, where gases including nitric acid deposit and are scavenged by fogwater. Therefore, high acidity caused by nitric acid and relatively low ion strength are observed in the fogwater at high elevation sites.

元の言語English
ページ(範囲)1-6
ページ数6
ジャーナルEnvironmental Science and Technology
36
発行部数1
DOI
出版物ステータスPublished - 2002 1 1
外部発表Yes

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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