Effect of atmospheric parameters on fine particulate concentration in suburban Shanghai--颗粒学报PARTICUOLOGY

Yao, J., Liu, W., Chen, W., Wang, G., Zeng, Y., Huang, Y., & Lin, J. (2013). Effect of atmospheric parameters on fine particulate concentration in suburban Shanghai. Particuology, 11(1), 48–54. https://doi.org/10.1016/j.partic.2012.08.003

Effect of atmospheric parameters on fine particulate concentration in suburban Shanghai

Jian Yao ^a *, Wei Liu ^a, Wangkun Chen ^b, Guanghua Wang ^a, Youshi Zeng ^a, Yu Huang ^a, Jun Lin ^a

a Key Laboratory of Nuclear Analysis Techniques, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
b Department of Environment and Property Management, Jin Wen University of Science & Technology, New Taipei 23154, Taiwan, China

10.1016/j.partic.2012.08.003

Volume 11, Issue 1, February 2013, Pages 48-54

Received 1 December 2011, Revised 7 April 2012, Accepted 30 August 2012, Available online 21 December 2012.

E-mail: yaojian@sinap.ac.cn

Highlights

► Fine particulate concentration dependence on atmospheric parameters was investigated in Shanghai.

► Effects of atmospheric parameters on fine particulate concentration are particle size-dependent.

► Both temperature and relative humidity should be considered to control fine particulate in winter.

Abstract

A study was conducted on the effect of atmospheric parameters, including temperature, wind speed, and relative humidity, on fine particulate mass concentrations measured in Jiading District of Shanghai, China, during the period from January 2009 to January 2010. A sensitivity analysis was applied to investigate the interaction between atmospheric parameters and particulate mass concentration. The experiment revealed that the concentration of particulates increased with particle size from 0.1 to 1.0 μm, and decreased with the increase of particle size from 1.0 to 2.5 μm. The effects of atmospheric parameters on fine mass concentrations were significantly particle size-dependent. The PM_1.0–2.5 may come from the size increase of smaller particulates after moisture absorption. And the variation of concentrations of PM_0.1–1.0 was mainly attributed to the accumulation of PM_0.1. The ventilation index and dilution index were calculated on the basis of data collected in December 2009. A correlation analysis indicated that there was a significant relation between these two indexes and the particulate concentration by examining the three particle size ranges, 0.0–0.1, 0.1–1.0, and 1.0–2.5 μm. The Spearman correlation coefficients that related the ventilation index to the concentration for the three particle size ranges were −0.45, −0.56 and −0.47, respectively, while the coefficients that related the dilution index to the concentration were −0.36, −0.42 and −0.45, respectively.

Graphical abstract

Keywords

Sensitivity analysis; Correlation analysis; Size distribution; Marginal variable

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