Aircraft measurements of gaseous pollutants and particulate matter over Pearl River Delta in China

Wang, Wei; Ren, Liehui; Zhang, Yuanhang; Chen, Jianhua; Liu, Hongjie; Liang, Bao; Fan, Saijun; Tang, Dian

doi:10.1016/j.atmosenv.2008.06.001

Cited by 55 publications

(24 citation statements)

References 22 publications

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“…These observations indicated that fine particles comprise a large fraction of PM 10 for both Dalian and Xiamen. The high PM 2.5 /PM 10 ratios in Xiamen were the same as those of the Pearl River Delta (PRD) region of China where the ratios observed were 0.86 (Wang et al, 2008) and 0.92 (Xu et al, 2002). Most of the coarse particles were primary in origin and included biological particles, particles produced by agricultural and construction works, marine aerosols, and some traffic-related particles (e.g., from brakes and tires).…”

Section: Discussionmentioning

confidence: 48%

Comparison of inorganic chemical compositions of atmospheric TSP, PM 10 and PM 2.5 in northern and southern Chinese coastal cities

Wang

Tan

et al. 2017

Journal of Environmental Sciences

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To compare the inorganic chemical compositions of TSP (total suspended particulate), PM 10 (particulate matter with an aerodynamic diameter less than 10 μm) and PM 2.5 (particulate matter with an aerodynamic diameter less than 2.5 μm) in southern and northern cities in China, atmospheric particles were synchronously collected in Dalian (the northern city) and Xiamen (the southern city) in spring and autumn of 2004. The mass concentrations, twenty-three elements and nine soluble ions were assessed. The results show that in Dalian, the mass concentrations of Mg, Al, Ca, Mn and Fe in spring were 4.0-10.1, 2.6-8.0, 4.1-12, 1.2-3.6 and 2.9-7.9 times higher, respectively, than those in Xiamen. The dust storm influence is more obvious in Dalian in spring. However, in Xiamen, heavy metals accounted for 13.9%-17.9% of TSP, while heavy metals contributed to 5.5%-9.3% of TSP in Dalian.These concentrations suggest that heavy metal pollution in Xiamen was more serious. In addition, the concentrations of Na

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Section: Discussionmentioning

confidence: 48%

Comparison of inorganic chemical compositions of atmospheric TSP, PM 10 and PM 2.5 in northern and southern Chinese coastal cities

Wang

Tan

et al. 2017

Journal of Environmental Sciences

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“…However, leaded gasoline had been continually used for quite a long time in China; a large amount of particulate matter containing Pb had been emitted, and then deposited to the ground, especially on road surfaces and the roadside. A decrease of Pb content in topsoil will take a long time (Wang et al 2008). Otherwise, Pb is also used in brake pads.…”

Section: Summentioning

confidence: 99%

Determination of road dust loadings and chemical characteristics using resuspension

Chen

Wang

Liu

et al. 2011

Environ Monit Assess

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The contribution of fugitive dust from traffic to air pollution can no longer be ignored in China. In order to obtain the road dust loadings and to understand the chemical characteristics of PM(10) and PM(2.5) from typical road dust, different paved roads in eight districts of Beijing were selected for dust collection during the four seasons of 2005. Ninety-eight samples from 28 roads were obtained. The samples were resuspended using equipment assembled to simulate the rising process of road dust caused by the wind or wheels in order to obtain the PM(10) and PM(2.5) filter samples. The average road dust loading was 3.82 g m(-2), with the highest of 24.22 g m(-2) being in Hutongs in the rural-urban continuum during winter. The road dust loadings on higher-grade roads were lower than those on lower-grade roads. Attention should be paid to the pollution in the rural-urban continuum areas. The sums of element abundances measured were 16.17% and 18.50% for PM(10) and PM(2.5) in road dust. The average abundances of OC and EC in PM(10) and PM(2.5) in road dust were 11.52%, 2.01% and 12.50%, 2.06%, respectively. The abundance of elements, water-soluble ions, and OC, EC in PM(10) and PM(2.5) resuspended from road dust did not change greatly with seasons and road types. The soil dust, construction dust, dust emitted from burning coal, vehicle exhaust, and deposition of particles in the air were the main sources of road dust in Beijing. Affected by the application of snow-melting agents in Beijing during winter, the amount of Cl( - ) and Na( + ) was much higher during that time than in the other seasons. This will have a certain influence on roads, bridges, vegetations, and groundwater.

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“…Secondly, the concentration of specific components, such as SO 2 , CO, O 3 , NO x , etc. directly measured from the aircraft, facilitates quantitative analysis (e.g., Hatakeyama et al, 2004;Corrigan et al, 2008;Wang et al, 2008;Chen et al, 2013;Zhang et al, 2014). Airborne measurements allow to distinguish the FT air pollutants from those in the PBL, and in turn allow to identify the meteorological conditions related with the occurrence of high-concentration events in the troposphere.…”

Section: Introductionmentioning

confidence: 99%

Airborne Measurements of High Pollutant Concentration Events in the Free Troposphere over the West Coast of South Korea between 1997 and 2011

Lee

et al. 2016

Aerosol Air Qual. Res.

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Aircrafts enable the direct measurement of chemical components in the free troposphere (FT). This study employed airborne measurements to examine the occurrences of high concentrations of SO 2 and NO x in the FT over the coastal region west of the Seoul metropolitan area, South Korea. The data from a long-term (1997-2011) airborne measurement campaign were used to determine the meteorological conditions favorable for carrying these pollutants into the Seoul area. The back trajectory analyses of 21 instances of high FT pollutant concentration events showed ascending patterns from the major pollutant sources, mainly the industrial complexes in eastern China, in 9 instances and passing patterns in 12 instances. In the ascending instances, developing low-pressure systems over the source regions provide favorable conditions to uplift air pollutants from the surface into the FT. In the passing instances, an anomalous low-pressure system near the surface prevented airflows from descending into the boundary layer and upper-level anticyclonic systems helped to keep the ascending airflows in the FT. This study proposes the basic mechanisms for predicting air quality in the Seoul area, considering that air pollutants in the FT often entrain into the boundary layer to increase local concentrations.

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Aircraft measurements of gaseous pollutants and particulate matter over Pearl River Delta in China

Cited by 55 publications

References 22 publications

Comparison of inorganic chemical compositions of atmospheric TSP, PM 10 and PM 2.5 in northern and southern Chinese coastal cities

Comparison of inorganic chemical compositions of atmospheric TSP, PM 10 and PM 2.5 in northern and southern Chinese coastal cities

Determination of road dust loadings and chemical characteristics using resuspension

Airborne Measurements of High Pollutant Concentration Events in the Free Troposphere over the West Coast of South Korea between 1997 and 2011

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