Composition, source, mass closure of PM2.5 aerosols for four forests in eastern China

Li, Li; Wu, Wei; Feng, Jin; Zhang, Jianhua; Li, Huaijian; Gu, Zeping; Wang, Bang-Jin; Sheng, Guoying; Fu, Jiamo

doi:10.1016/s1001-0742(09)60122-4

Cited by 59 publications

(26 citation statements)

References 45 publications

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“…This is probably related to their higher precursors emissions derived from the extra coal consumption for collective heating in cold season in northern China, rapid economic development and high population density in Yangtze River delta and the terrain unfavorable for the air diffusion in Sichuan Basin. Low SNA levels are observed at sparsely populated mountain, forest and background sites, such as Jianfengling (Li et al, 2010a), Mt. Tai (Deng et al, 2010) and Hok Tusi (Lai et al, 2007) ) of SNA in urban areas.…”

Section: Spatial and Temporal Distributions Seasonal Distributionsmentioning

confidence: 99%

The Concentrations, Formations, Relationships and Modeling of Sulfate, Nitrate and Ammonium (SNA) Aerosols over China

Cao

Zhou

et al. 2017

Aerosol Air Qual. Res.

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Sulfate, nitrate and ammonium (SNA) are the dominant composition of secondary aerosols in the atmosphere and have a significant impact on public health, atmospheric chemistry process and climate. In this study, to evaluate SNA pollution in China, a first nationwide investigation derived from almost all published data in the field measurement before 2012 was carried out. The results show that SNA levels in China are about 3-5 times higher than those in USA and Europe. SNA account for 34.2 ± 10.9% in PM 2.5 and 28.2 ± 8.5% in PM 10 . The highest SNA concentrations occur in urban areas of northern China. SNA all have peaks in winter, but the nadirs are in spring for sulfate and ammonium and in summer for nitrate. SOR (sulfur oxidation ratio) and NOR (nitrogen oxidation ratio) values show that the formations of sulfate and nitrate are distinct in different regions and seasons. The low average NO 3 -/SO 4 2-ratio (0.43 ± 0.26) indicates that the stationary emissions from coal combustion remain the main sources. There is a good relationship between (2[SO 42-] + ) and [NH 4 + ] with near 1 slope, signifying that (NH 4 ) 2 SO 4 and NH 4 NO 3 are the predominant forms which SNA exist in particles in China. Based on the comprehensive observational data in China, the simulation for SNA aerosols by GISS in CMIP5 were evaluated.

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Section: Spatial and Temporal Distributions Seasonal Distributionsmentioning

confidence: 99%

The Concentrations, Formations, Relationships and Modeling of Sulfate, Nitrate and Ammonium (SNA) Aerosols over China

Cao

Zhou

et al. 2017

Aerosol Air Qual. Res.

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“…Indeed the chemical mass closure exercise applied on the samples that were analyzed for their content in metals (not shown here), shows that the explained part of the PM mass rises to 93 ± 9%. The rest of the unresolved mass could also be attributed to volatilization losses, measurement artifacts, the uncertainty from rough conversion factor calculation (Li et al, 2010) or systematic errors in chemical analysis (Terzi et al, 2010).…”

Section: Chemical Mass Closurementioning

confidence: 99%

Sources of atmospheric aerosol from long-term measurements (5years) of chemical composition in Athens, Greece

Paraskevopoulou

Liakakou

Gerasopoulos

et al. 2015

Science of The Total Environment

114

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“…Aerosol particles, especially PM 2.5 , were usually dominated by organics matters in urban environments in China (Ye et al, 2003;Yang et al, 2005;Wang et al, 2006;Tao et al, 2013;. In forest environments, aerosol chemical composition could differ by wind directions or measurement sites and the dominate species could be organics or sulfate (Allan et al, 2006;Cavalli et al, 2006;Li et al, 2010). Marine aerosols were affected by anthropogenic emissions and their chemical composition could vary with different sources and locations (Heintzenberg et al, 2000;Bardouki et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Aerosol Hygroscopcity, Volatility, and Chemical Composition between a Suburban Site in the Pearl River Delta Region and a Marine Site in Okinawa

Cai

Tan²,

Chan

et al. 2017

Aerosol Air Qual. Res.

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A suite of advanced instruments were employed to measure aerosol hygroscopicity, volatility and chemical composition at a suburban site in the Pearl River Delta (PRD) Region and at a marine site in Okinawa, respectively. The results showed that the particle number concentration in PRD is approximately ten times higher than that in Okinawa. Organics contributes about one half of the total NR-PM 1 concentration in PRD, while sulfate is the dominant component (about 60%) in Okinawa. Diurnal variation of the chemical species demonstrated that the site in PRD was affected by trafficrelated sources and industrial emissions, while the one in Okinawa is mainly affected by regional emissions. The V-TDMA measurements showed that a large fraction (20-45%) of particles in Okinawa volatilized at about 200°C and nearly all particles volatilized at about 300°C, indicating that the particles were almost volatile in Okinawa. In contrast, a fraction (15-21%) of particles in PRD did not evaporate even when heated to about 300°C, implying that these particles might contain black carbon or low-volatile organics. For 40-200 nm particles in Okinawa, the hygroscopicity parameter κ is around 0.5, significantly higher than that of PRD particles (κ ≈ 0.26). Particles tend to have bimodal distribution in PRD and unimodal in Okinawa, indicating that the former is externally mixed while the latter is internally mixed.

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Composition, source, mass closure of PM2.5 aerosols for four forests in eastern China

Cited by 59 publications

References 45 publications

The Concentrations, Formations, Relationships and Modeling of Sulfate, Nitrate and Ammonium (SNA) Aerosols over China

The Concentrations, Formations, Relationships and Modeling of Sulfate, Nitrate and Ammonium (SNA) Aerosols over China

Sources of atmospheric aerosol from long-term measurements (5years) of chemical composition in Athens, Greece

Comparison of Aerosol Hygroscopcity, Volatility, and Chemical Composition between a Suburban Site in the Pearl River Delta Region and a Marine Site in Okinawa

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