Sulphates and sulphuric acid in the atmosphere in the years 1971–1976 in The Netherlands

Elshout, A.J.; Viljeer, J. W.; Duuren, H. Van

doi:10.1016/0004-6981(78)90260-3

Cited by 16 publications

(1 citation statement)

References 12 publications

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“…Leaves, branches, buds, and bark strongly adsorb atmospheric particulate matter, thereby influencing particulate matter depositions [7]. To date, studies of deposition of PM 2.5 sulfate in forest systems have been mainly conducted in Europe and the United States [8][9][10][11][12][13][14], as well as some Asian countries other than China [15][16][17]. As the capital of China, which also happens to be deeply affected by haze, research on the deposition characteristics of PM 2.5 sulfate on forest systems in Beijing is of great importance and will help to determine the effect of these ecosystems on PM 2.5 sulfate removal in China.…”

Section: Introductionmentioning

confidence: 99%

Deposition of PM2.5 Sulfate in the Spring on Urban Forests in Beijing, China

Zhao

Lun

et al. 2017

Atmosphere

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Water-soluble ions such as sulfate may have great impacts on atmospheric pollution. To determine the deposition effect of PM 2.5 sulfates, the major PM 2.5 constituents, in the forest canopy in Beijing, China, an investigation was carried out in an urban forest, Olympic Forest Park, and a suburban forest, Jiufeng National Forest Park. We measured the vertical distributions of sulfate by using monitoring towers in the two forests at the same times in March and May 2013. Sulfate (SO 4 2− )was predominant in all PM 2.5 water-soluble inorganic ions, with a proportion >40%. The vertical concentration of SO 4 2− increased with height, and the average sulfate concentration in Olympic ForestPark was higher than that in Jiufeng National Forest Park. Results also revealed that meteorological conditions had significant impacts on both the sulfate concentration and the deposition velocity. In winter, the deposition of SO 4 2− through the canopy was not obvious in the two forest parks, which was quite the opposite in spring. The deposition velocity in the daytime was higher than that in the nighttime in both Olympic Forest Park (0.9 ± 1.0 cm/s vs. 0.4 ± 0.3 cm/s) and Jiufeng National Forest Park (1.3 ± 1.2 cm/s vs. 0.8 ± 0.8 cm/s). While Jiufeng National Forest Park turned out to have a higher average sulfate deposition velocity than Olympic Forest Park.

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