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Discussion papers | Copyright
https://doi.org/10.5194/acp-2018-225
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 25 Apr 2018

Research article | 25 Apr 2018

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This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Chemistry and Physics (ACP).

Air quality in the middle and lower reaches of the Yangtze River channel: A cruise campaign

Zhong Li1, Chunlin Li1,2, Xingnan Ye1, Hongbo Fu1, Lin Wang1, Xin Yang1, Xinke Wang3, Zuohui Zhao4, Haidong Kan4, Abdelwahid Mellouki5, and Jianmin Chen1,4 Zhong Li et al.
  • 1Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Fudan Tyndall Center, Department of Environmental Science & Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai 200433, China
  • 2Department of Earth and Planetary Sciences, Weizmann Institute of Science
  • 3Univ. Lyon, Université Claude Bernard Lyon 1 CNRS, IRCELYON, F-69626, Villeurbanne, France
  • 4School of Public Health, Fudan University, Shanghai 200032, China
  • 5Institut de Combustion, Aérothermique, Réactivité et Environnement, CNRS, 45071 Orléans cedex 02, France

Abstract. Yangtze River is the longest river in China, nearly one-third of the national population lives along the River. Air quality over the Yangtze River is interesting as it may have significant influences on aquatic ecosystem, public health onboard and coastal areas. A comprehensive 15-days cruise campaign has been performed in the Mid-Lower Reaches Yangtze River (MLYR) in winter of 2015. Based on the filter samples, the concentration and chemical composition of PM2.5 were greatly varied or fluctuated in different regions. Crustal elements (Ca, Mg, Al and K) from floating dust showed peak concentrations in the Yangtze River Delta (YRD) regions, while secondary species (SO42−, NO3 and NH4+) and some most enriched elements (Pb, As, Se and Cd) presented high levels in the central China (Wuhan). The significant correlation between Se and SO42− suggested that coal combustion may play a key role on the secondary inorganic formation. The relative high enrichment factors (EFs) of Ca (EFs>100) suggested the crustal elements may derive from anthropogenic sources. Furthermore, the concentration of levoglucosan in PM2.5 and CO column level from satellite data greatly enhanced in the rural area (Anhui and Jiangxi), indicating that biomass burning may make remarkable contribution to rural area. The concentrations of V and Ni were found to evidently elevate in the Shanghai port, which were mainly ascribed to the ship emission through the air mass source analysis and the relatively high ratio of V/Ni as well. This result shown herein portrayed a good picture of air pollution along the Yangtze River.

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Air quality over the Yangtze River is interesting as it may significantly influence aquatic ecosystem, public health onboard and coastal areas. A comprehensive 15-days cruise campaign has been performed in the Mid-Lower Reaches Yangtze River in winter of 2015. Based on the filter samples, the chemical composition of PM2.5 greatly varied or fluctuated.
Air quality over the Yangtze River is interesting as it may significantly influence aquatic...
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