Size Distributions of Water-soluble Inorganic Ions in Atmospheric Aerosols during the Meiyu Period on the North Shore of Taihu Lake, China

Liu, Duanyang; Su, Yan Kuin; Peng, Huaqing; Yan, Wenlian; Li, Yang; Liu, Xuejun; Zhu, Bin; Wang, Honglei; Zhang, Xiliang

doi:10.4209/aaqr.2018.04.0123

Cited by 4 publications

(4 citation statements)

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“…Figure 9 reveals that the mean ratio of NO 3 − /SO 4 2− in PM 1.1 -2.1 before Meiyu onset is smaller than that during the Meiyu period, and it is higher than that in PM 1.1 , indicating that the vehicle emissions contribute more to PM 1.1-2.1 than to PM 1.1 . Moreover, the contribution of vehicle exhaust increases during the Meiyu period, which is the same as the result from a case study in Wuxi in 2014 (Liu et al, 2018).…”

Section: Changes Of Secondary Aerosolssupporting

confidence: 84%

“…In this study, we selected Wuxi meteorological observational station (WMOS, 31.6127 °N, 120.3544 °E, altitude: 3.2 m) as the sampling site (Figure 1). All the measurements were conducted on June 4 to July 5, 2016 (Guo et al, 2013;Liu et al, 2018). The monitoring site is surrounded by farms and is located on the ground.…”

Section: Experiments and Data Observation Stations And Experiments Descriptionsmentioning

confidence: 99%

“…The sampling instrument was using the 80 mm Teflon filter (Whatman, Clifton, England) for water-soluble inorganic ionic components, and the membranes were weighted by Mettler Toledo MX-5 microbalance after constant temperature (25 °C) and humidity (50%) treatment for 48 h before and after sampling, the microbalance was calibrated using standard weight. The weight difference before and after sampling is particle weight (Wang et al, 2015;Liu et al, 2018).…”

Section: Water-soluble Inorganic Ionsmentioning

confidence: 99%

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Size Distributions of Water-Soluble Inorganic Ions in Atmospheric Aerosols During the Meiyu Period in the Yangtze River Delta, China

Liu

Zhao

et al. 2021

Front. Environ. Sci.

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In order to investigate the chemical composition distributions and pollution characteristics of Total water-soluble inorganic ions (TWSII) in the rain period (Meiyu) in the East Asian summer monsoon season, including the impact of Meiyu on air pollution in the Yangtze River Delta, East China, the gaseous pollutant concentrations, the 9 sizes segregated particles, and water-soluble inorganic ions of aerosols were measured on the north shore of Taihu Lake from June 4 to July 5, 2016. Results show that the mass concentrations of atmospheric particulate matters (PM2.5 and PM10) and main gaseous pollutants (SO2, NO2, CO, and O3) decrease during the Meiyu period, with the largest decline in PM10 and the smallest in CO. TWSII in atmospheric particles are mainly concentrated in fine particles during the Meiyu period. The values of ρ (TWSII) for PM1.1, PM1.1–2.1, and PM2.1–10 before the Meiyu onset are generally greater than those during the Meiyu period. During the first pollution process, the ρ(TWSII) for PM1.1 and PM1.1–2.1 first increase to the peak values, and then decrease during the moderate rainfall period, when the ρ(TWSII) in PM2.1–10 increase to its maximum before the Meiyu onset. The mass concentrations for anions, cations, and total ions at different particle-size sections all exhibit bimodal distributions before and after the Meiyu onset. The mass concentration peaks at a particle size of 1.1–2.1 μm for fine particles, while at 5.8–9.0 μm (before the Meiyu onset) and 9.0–10.0 μm (during the Meiyu period) for coarse particles, respectively. The peak particle size for mass concentration of coarse particles moves toward larger sizes during the Meiyu period. The mass concentrations of SO42− at different particle-size sections show a bimodal distribution before the Meiyu onset and a multi-modal distribution during the Meiyu period. The mass concentrations of NO3− at different particle-size sections show a bimodal distribution before the Meiyu onset and a unimodal distribution during the Meiyu period. The mass concentrations of NH4+ at different particle-size sections present a bimodal distribution before and after the Meiyu onset, with the particle-size for peak concentrations distributing in 1.1–2.1 and 5.8–9.0 μm before the Meiyu onset, and 9.0–10.0 μm during the Meiyu period. The mean value of nitrogen oxidation ratio (NOR) is higher before the Meiyu onset than after, indicating that the secondary conversion of NO2 before the Meiyu onset is enhanced. The sulfur oxidation ratio (SOR) values are greater than NOR values, but the concentrations of NO2 in the same period during the Meiyu period are higher than those of SO2, which indicates that the secondary conversion of SO2 during the Meiyu period on the north bank of Taihu Lake is stronger than that of NO2. During the whole observation, the contribution of stationary sources mainly contributed to the atmospheric particulate matters during the Meiyu period. The contributions of vehicle exhaust and coal combustion to fine particles are more obviously affected by the changes in meteorological conditions during the Meiyu period, and the vehicle emissions contribute more to PM1.1–2.1 than to PM1.1.

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Section: Changes Of Secondary Aerosolssupporting

confidence: 84%

Section: Experiments and Data Observation Stations And Experiments Descriptionsmentioning

confidence: 99%

Section: Water-soluble Inorganic Ionsmentioning

confidence: 99%

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Size Distributions of Water-Soluble Inorganic Ions in Atmospheric Aerosols During the Meiyu Period in the Yangtze River Delta, China

Liu

Zhao

et al. 2021

Front. Environ. Sci.

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“…Local emissions, pollutants transported from the North China Plain, and boundary layer change can all affect the intensity and duration of the fog-haze episode (Liang et al, 2017;Wang et al, 2016;Yu et al, 2016). The atmosphere boundary layer conditions in the Jianghuai area, which covers Jiangsu and Anhui provinces in this article, can affect not only local pollutant concentration but also pollutant transportation between North China and the Yangtze River Delta (Dai et al, 2020;Gu et al, 2020;Liu et al, 2018a;Liu et al, 2018b;Peng et al, 2016;Shen et al, 2021a;Shen et al, 2021b;Xie et al, 2021;Zhou et al, 2021).…”

Section: Introductionmentioning

confidence: 91%

A Movable Fog-Haze Boundary Layer Conceptual Model Over Jianghuai Area, China

Liu

Yan

Qian

et al. 2021

Front. Environ. Sci.

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The Jianghuai area is an “important” region not only for its local pollutant accumulation but the belt for pollutant transportation between North China and the Yangtze River Delta during the winter half of the year (often from October to next February). In this study, a movable boundary layer conceptual model for the Jianghuai area in the winter half of the year is established based on the analyses of characteristics of atmospheric circulations and boundary layer dynamic conditions. This conceptual model can well explain the causes of air quality change and frequent fog-haze episodes. Variations of the intensity and range of the cold and warm fronts in the Jianghuai area in the winter half of the year lead to form a movable boundary in this area. When the southerly wind is strong, or affected by strong cold air mass, the air quality in the Jianghuai area may be excellent with a low air pollution index; Two atmospheric circulations provide favorable conditions for the fog-haze formation and maintenance in Jianghuai area: 1) When the shallow weak cold air mass is below the deep moist warm air mass, a stable temperature inversion occurs. The pollutants are transported to the Jianghuai area by the weak cold air mass, and local emissions also accumulate. As a result, a severe air pollution episode appears. 2) When the northerly cold air mass is as intense as the southerly moist warm air mass, the pollutants transported from North China as well as local emissions will continuously accumulate in the study area, which may lead to more severe air pollution. This conceptual model can help us analyze atmospheric diffusion capacity, and benefit the forecast and early warning of airflow stagnation area and fog-haze episode.

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Manifesting the hidden pollutants: Quantifying emissions and environmental impact of petroleum refinery on PM2.5

Jindamanee,

Thepanondh,

Keawboonchu

et al. 2024

Atmospheric Environment: X

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Size Distributions of Water-soluble Inorganic Ions in Atmospheric Aerosols during the Meiyu Period on the North Shore of Taihu Lake, China

Cited by 4 publications

References 0 publications

Size Distributions of Water-Soluble Inorganic Ions in Atmospheric Aerosols During the Meiyu Period in the Yangtze River Delta, China

Size Distributions of Water-Soluble Inorganic Ions in Atmospheric Aerosols During the Meiyu Period in the Yangtze River Delta, China

A Movable Fog-Haze Boundary Layer Conceptual Model Over Jianghuai Area, China

Manifesting the hidden pollutants: Quantifying emissions and environmental impact of petroleum refinery on PM2.5

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