Dry deposition velocity of total suspended particles and meteorological influence in four locations in Guangzhou, China

Chen, Leifu; Shaolin, Peng; Liu, Jingang; Hou, Qianqian

doi:10.1016/s1001-0742(11)60805-x

Cited by 55 publications

(35 citation statements)

References 37 publications

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“…For PM 2.5 , the average of R (0.598) was also the highest, which is similar to the result of Liu et al [23]. Whereas the relative humidity was found to bring less effects in the study of meteorological influence in four locations in Guangzhou, China [43], possibly due to the difference of climate in Beijing and Guangzhou.…”

Section: Effect Of Meteorological Factors On Pm 10 and Pm 25 Concentsupporting

confidence: 85%

“…In spring, PM10 on the bare land was higher than that on the wetland during the daytime, which was opposite to the night and the dawn, while for PM2.5, its concentration on the wetland exceeded that on the bare land on the whole, as shown in Figures 2b and 3b. This was because the average wind speed on the wetland during the daytime was higher than that on the bare land, which can help the diffusion of larger particles in the air [43]. During the night, PM10 and PM2.5 increased more rapidly on the wetland, especially under cloudy and moderately hazy weather (28 April, 30 April, and 1 May).…”

Section: Pm Mass Concentrationmentioning

confidence: 99%

“…Compared with meteorological factors on the bare land, wind speed on the wetland was slower, which was 0.42 times of the data on the bare land, as shown in Table 1. These meteorological conditions would be adverse to diffusion and deposition of mass particles [21,43]. In addition, the PM 2.5 was more sensitive to meteorological conditions [23], and as a result, the PM 2.5 concentration on the wetland was higher than that on the bare land.…”

Section: Pm Mass Concentrationmentioning

confidence: 99%

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The Concentrations and Removal Effects of PM10 and PM2.5 on a Wetland in Beijing

Huang

Guo

et al. 2019

Sustainability

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Particulate matter (PM) is an essential source of atmospheric pollution in metropolitan areas since it has adverse effects on human health. However, previous research suggested wetlands can remove particulate matter from the atmosphere to land surfaces. This study was conducted in the Hanshiqiao Wetland National Nature Reserve in Beijing during 2016. The concentrations of PM10 and PM2.5 on a wetland and bare land in the park, as well as metrological data, were collected during the whole year. Based on the observed data, removal efficiency of each land use type was calculated by empirical models and the relationships between concentrations and metrological factors were also analyzed. The results indicated that: (1) In general, the PM10 and PM2.5 concentrations on the bare land surface were higher than those on the wetland surface, in both of which the highest value appeared at night and evening, while the lowest value appeared near noon. In terms of season, the average concentration of PM10 was higher in winter (wetland: 137.48 μg·m−3; bare land: 164.75 μg·m−3) and spring (wetland: 205.18 μg·m−3; bare land: 244.85 μg·m−3) in general. The concentration of PM2.5 on the wetland surface showed the same pattern, while that on the bare land surface was higher in spring and summer. (2) Concentrations of PM10 and PM2.5 were significantly correlated with the relative humidity (p < 0.01) and inversely correlated with wind speed (p < 0.05). The relationship between PM10 and PM2.5 concentrations and temperature was more complicated—it showed a significantly negative correlation (p < 0.01) between them in winter and spring, however, the correlation was insignificant in autumn. In summer, only the correlation between PM10 concentration and temperature on the wetland surface was significant (p < 0.01). (3) The dry removal efficiency of PM10 was greater than that of PM2.5. The dry removal efficiencies of PM10 and PM2.5 followed the order of spring > winter > autumn > summer on the wetland. This study seeks to provide practical measures to improve air quality and facilitate sustainable development in Beijing.

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Section: Effect Of Meteorological Factors On Pm 10 and Pm 25 Concentsupporting

confidence: 85%

Section: Pm Mass Concentrationmentioning

confidence: 99%

Section: Pm Mass Concentrationmentioning

confidence: 99%

See 1 more Smart Citation

The Concentrations and Removal Effects of PM10 and PM2.5 on a Wetland in Beijing

Huang

Guo

et al. 2019

Sustainability

View full text Add to dashboard Cite

show abstract

“…In spring, PM10 on bare land was higher than that on wetland during the daytime, which was opposite to night and dawn, while for PM2.5, its concentration on wetland exceeded that on the bare land on the whole (Figure 2b). This is because the average wind speed on wetland during the daytime is higher than that on bare land, which can help to the diffusion of larger particles in the air [40]. In summer, according to Figure 2c, there is no obvious difference of PM10 concentration between the two land types except for the two days, 22 th and 23 th in July, which is similar to that of PM2.5.…”

Section: Pm Mass Concentrationmentioning

confidence: 74%

The Concentrations and Removal Efficiency of PM<sub>10</sub> and PM<sub>2.5</sub> on Wetland in Beijing

Li¹,

Huang²,

Guo³

et al. 2019

Preprint

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Particulate matter is a severe source of atmospheric pollution in urban cities, and it has adverse effects on human health. This study was conducted during the whole year of 2016 to monitor the concentrations of PM10 and PM2.5 on the Beijing Hanshiqiao wetland and bare land in Beijing to analyze their correlations with meteorological factors and compare the removal efficiency between two land surface types. The results indicated that (1) the PM10 and PM2.5 concentrations on the bare land were higher than those on wetland as a whole, reaching the highest value both at night and dusk and the lowest value near noon. The average concentration of PM10 was higher in winter (wetland: 137.48 μg·m-3; bare land: 164.75 μg·m-3) and spring (wetland: 205.18 μg·m-3; bare land: 244.85 μg·m-3) and the concentration of PM2.5 on the wetland also reached the higher value in winter and spring with the average of 84.52 μg·m-3 and 98.98 μg·m-3, whereas, it was higher in spring and summer on the bare land; (2) concentrations of PM10 and PM2.5 were significantly positively affected by the relative humidity (P < 0.01) and negatively influenced by wind speed (P < 0.05). The relationship between PM10 and PM2.5 concentrations and temperature was found complicated: it showed a significantly negative correlation (P < 0.01) in winter and spring and was insignificant in autumn, but in summer, only the correlation between the PM10 concentration and temperature on wetland was significant (P < 0.01); (3) the removal efficiencies of PM10 and PM2.5 followed the order of spring > winter > autumn > summer on the wetland, and the removal efficiency of PM10 was greater than that of PM2.5. This study is aim to provide practical measures to improve the air quality and facilitate sustainable development in Beijing.

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“…Evans found values 0.18 < v d < 0.76 cm s À1 for particles <10 mm and 1.42 < v d < 2 cm s À1 for particles >11 mm. Furthermore, quite recently Chen et al (2012) found that for totally suspended particles on the average v d is (1.49 AE 0.77) cm s À1 , (1.44 AE 0.77) cm s À1 Fig. 7.…”

Section: Dry Deposition Velocitymentioning

confidence: 93%

Various consequences regarding hypothetical dispersion of airborne radioactivity in a city center

Jonsson

Plamboeck

Johansson

et al. 2013

Journal of Environmental Radioactivity

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Dry deposition velocity of total suspended particles and meteorological influence in four locations in Guangzhou, China

Cited by 55 publications

References 37 publications

The Concentrations and Removal Effects of PM10 and PM2.5 on a Wetland in Beijing

The Concentrations and Removal Effects of PM10 and PM2.5 on a Wetland in Beijing

The Concentrations and Removal Efficiency of PM<sub>10</sub> and PM<sub>2.5</sub> on Wetland in Beijing

Various consequences regarding hypothetical dispersion of airborne radioactivity in a city center

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