論文

査読有り
2015年1月

Long-term observation of fog chemistry and estimation of fog water and nitrogen input via fog water deposition at a mountainous site in Hokkaido, Japan

ATMOSPHERIC RESEARCH
  • Takashi Yamaguchi
  • ,
  • Genki Katata
  • ,
  • Izumi Noguchi
  • ,
  • Shigekatsu Sakai
  • ,
  • Yoko Watanabe
  • ,
  • Mitsuo Uematsu
  • ,
  • Hiroshi Furutani

151
開始ページ
82
終了ページ
92
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.atmosres.2014.01.023
出版者・発行元
ELSEVIER SCIENCE INC

To evaluate water and nitrogen input via fog deposition, the fog water chemistry and deposition around a crater lake (Lake Mashu) in northern japan were investigated in the growing seasons of trees (summer to autumn) in 2006-2012. The fog samples were collected using an active fog collector and droplet size distribution was measured with a droplet size spectrometer (FM-100). The visibility (VIS)-liquid water content of fog (LWC) relationship differed between summer and autumn. Large fog droplets decreased in autumn and the calculated LWC from FM-100 measurements (LWCobs) were lower than those in summer at the same VIS. Two empirical curves between LWCobs and VIS were obtained and used for better estimation of fog deposition. Fog deposition was calculated from LWC empirically derived from past VIS data and deposition velocity (V-d) estimated using wind speed and vegetation parameters. The mean pH of fog water was 4.6 and the percentage of samples of pH 4.0 or more was 93%. Compared to previous literature of exposure experiments of acid mist on plants, fog acidity in this study did not seem to injure plant leaves. The water input via fog deposition accumulated for each growing season was estimated at 107-140 mm, corresponding to 18-23% of the precipitation in the same period. Nitrogen deposition via fog deposition in a plant growing season was estimated at 26-30 meq m(-2) (3.6-4.2 kg N ha(-1)). As a long-term trend, NO3- concentration in fog water decreased significantly. However, the long-term trends of fog and nitrogen depositions were not clear. (C) 2014 Elsevier B.V. All rights reserved.

Web of Science ® 被引用回数 : 9

リンク情報
DOI
https://doi.org/10.1016/j.atmosres.2014.01.023
Scopus
https://www.scopus.com/record/display.uri?eid=2-s2.0-84910063022&origin=inward
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000343786500009&DestApp=WOS_CPL
Scopus
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