期刊
ATMOSPHERIC RESEARCH
卷 87, 期 3-4, 页码 224-231出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.atmosres.2007.11.004
关键词
total ionic content; fog precipitation; fog deposition; seeder-feeder effect; acid rain; Sudety Mountains
The changing chemical composition of cloud water and precipitation in the Western Sudety Mountains are discussed against the background of air-pollution changes in the Black Triangle since the 1980s until September 2004. A marked reduction of sulphur dioxide emissions between the early 1990's and the present (from almost 2 million tons to around 0.2 million tons) has been observed, with a substantial decline of sulphate and hydrogen concentration in cloud water (SO42- from more than 200 to around 70 mu mol l(-1); H+ from 150 to 50 mu mol l(-1)) and precipitation (SO42- from around 80 to 20-30 mu mol l(-1); H+ from around 60 to 10-15 mu mol l(-1)) samples. At some sites, where fog/cloud becomes the major source of pollutants, deposition hot spots are still observed where, for example, nitrogen deposition can exceed 20 times the relevant critical load. The results show that monitoring of cloud water chemistry can be a sensitive indicator of pollutant emissions. (c) 2007 Elsevier B.V. All rights reserved.
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