Temporal distribution and potential sources of atmospheric mercury measured at a high-elevation background station in Taiwan

Sheu, Guey Rong; Lin, Neng Huei; Wang, Jia Lin; Lee, Chung Te; Yang, Chi; Wang, Sheng Hsiang

doi:10.1016/j.atmosenv.2010.04.009

Cited by 144 publications

(136 citation statements)

References 34 publications

Supporting

Mentioning

116

Contrasting

Order By: Relevance

“…These sites are relatively close to the areas with large population and therefore subject to the influence of anthropogenic emissions. Much lower GEM (1.7 ± 0.6 ng m À3 ) was observed at Lulin Atmospheric Background Station in Taiwan [Sheu et al, 2010], due to the frequent influence of free troposphere air at the high-altitude background station. A comparison among the concentrations observed at these sites is summarized in the supporting information (Table S1).…”

Section: Atmospheric Concentrations Of Tgm Gom and Pbmmentioning

confidence: 94%

Characteristics and potential sources of atmospheric mercury at a subtropical near‐coastal site in East China

et al. 2015

View full text Add to dashboard Cite

To evaluate the impact of regional mercury (Hg) emissions and understand possible source regions of atmospheric Hg in Eastern China, 2 year observation for speciated atmospheric Hg was conducted at the Dameishan Atmospheric Observatory, a mountain site near the east coast of China. The observed concentration of total gaseous Hg (TGM) was 3.3 ± 1.4 ng m À3 . During the sampling period, gaseous oxidized Hg and particulate bound Hg were 6.7 ± 4.3 pg m À3 and 180 ± 110 pg m À3 in winter and 5.9 ± 3.4 pg m À3 and 130 ± 100 pg m À3 in spring, respectively. The relatively high mean concentration of TGM was mainly caused by regional anthropogenic emissions and occasional long-range transport from domestic source regions. Seasonal variation in the TGM concentration was observed with lower values in the wet monsoon season (from May to September) and higher values in the dry monsoon season (from October to April). Backward trajectories and potential source contribution function analysis suggested that anthropogenic Hg emission from coal combustion in the Yangtze River Delta region was the most likely cause for the elevated TGM concentrations. Relatively clean air originating from the East China Sea was the most possible cause for the observed low TGM concentrations. Positive correlation between TGM concentration and air quality index suggests that emissions that influenced regional air quality contributed to the elevated TGM concentrations.

show abstract

Section: Atmospheric Concentrations Of Tgm Gom and Pbmmentioning

confidence: 94%

Characteristics and potential sources of atmospheric mercury at a subtropical near‐coastal site in East China

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Atmospheric Hg output from East Asia across the boundary has received much attentions (Jaffe et al, 2005;Ci et al, 2011b;Weiss-Penzias et al, 2007;Obrist et al, 2008;Sheu et al, 2010). The Yellow Sea is located on the western Asian continental margin.…”

Section: Introductionmentioning

confidence: 99%

Elemental mercury (Hg(0)) in air and surface waters of the Yellow Sea during late spring and late fall 2012: Concentration, spatial-temporal distribution and air/sea flux

Wang

et al. 2015

Chemosphere

View full text Add to dashboard Cite

“…The annual mean temperature is 10°C, with highest monthly mean temperature in July (14°C) and lowest in January (5°C). The average annual precipitation exceeds 4000 mm per year (Sheu et al, 2010). The measurement was performed on the rooftop of the two-story LABS building at 6 m above ground level.…”

Section: Site Descriptionmentioning

confidence: 99%

Chemical Composition of Fog Water at Four Sites in Taiwan

Šimon

Klemm

El-Madany

et al. 2016

Aerosol Air Qual. Res.

Self Cite

View full text Add to dashboard Cite

This study characterizes and compares the chemical composition of fog water at four sites in Taiwan. Fog was sampled with identical active fog collectors (modified Caltech design) using identical sampling strategies at all four sites. While the sites varied largely in terms of altitude above mean sea level (asl), type of fog, and the potential sources of constituents in fog water, the chemical composition of fog water was in all cases clearly dominated by H + , NH 4 + , NO 3 -and SO 4 2-, making up more than 85% of the total ion concentrations. The pH ranged from 2.27 to 5.95.Sulfur dioxide emissions from coal combustion in Mainland China and Taiwan as well as nitrogen oxide emissions from urbanized central-west Taiwan and the greater Taipei region were the main precursors of fog acidity. Ammonia, originating from agriculture emissions, was the main neutralizer. The Kinmen site (48 m asl), situated on an island close to Mainland China, exhibited the lowest pH and the highest sulfate concentrations. At the Xitou site on the western slopes of the Taiwan Central Mountain Range (1150 m asl), ammonium from agriculture dominated and lead to relatively high pH. At the same time, the nitrate/sulfate ratio was highest at this site (> 1 in equivalent units), resulting from relatively large contributions from street traffic. The ion concentrations at the Chilan site (1650 m asl) and the Lulin high mountain site (2862 m asl) were much lower than those at Xitou and Kinmen. While the ion concentrations at Chilan were considerably lower than at Lulin, the ion loadings, which is the amount of dissolved ions per volume of air, were similar at Chilan and Lulin.

show abstract

Temporal distribution and potential sources of atmospheric mercury measured at a high-elevation background station in Taiwan

Cited by 144 publications

References 34 publications

Characteristics and potential sources of atmospheric mercury at a subtropical near‐coastal site in East China

Characteristics and potential sources of atmospheric mercury at a subtropical near‐coastal site in East China

Elemental mercury (Hg(0)) in air and surface waters of the Yellow Sea during late spring and late fall 2012: Concentration, spatial-temporal distribution and air/sea flux

Chemical Composition of Fog Water at Four Sites in Taiwan

Contact Info

Product

Resources

About