Atmospheric extinction properties in Shenyang, China--颗粒学报PARTICUOLOGY

Liu, N., Ma, Y., Ma, J., Wang, Y., Yang, S., & Li, L. (2015). Atmospheric extinction properties in Shenyang, China. Particuology, 18, 120–126. https://doi.org/10.1016/j.partic.2014.03.007

Atmospheric extinction properties in Shenyang, China

Ningwei Liu ^{a b c}, Yanjun Ma ^c *, Jianzhong Ma ^a, Yangfeng Wang ^c, Suying Yang ^b, Liguang Li ^c

a Chinese Academy of Meteorological Sciences, Beijing 100081, China
b Nanjing University of Information Science & Technology, Nanjing 210044, China
c Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110016, China

10.1016/j.partic.2014.03.007

Volume 18, February 2015, Pages 120-126

Received 6 October 2013, Revised 28 February 2014, Accepted 5 March 2014, Available online 3 June 2014.

E-mail: mayanjun0917@163.com

Highlights

• Hourly data observed throughout 2010 were used to evaluate atmospheric extinction properties.

• Coefficient of total extinction exhibited a maximum at 5–6 am and a minimum at 3 pm.

• Particle scattering accounted for 87.49% of the total extinction.

Abstract

Atmospheric visibility impairment due to human activities is becoming increasingly significant in metropolitan Shenyang, China. In this study, hourly data of relevant factors throughout the year 2010 in Shenyang were used to evaluate the local atmospheric extinction properties. The results show that the average coefficient of total extinction and aerosol single-scattering albedo in 2010 were 622.72 Mm⁻¹ and 0.87, respectively, values that are characteristic of the “municipal pollution type”. Visibility is most impaired during winter and especially in January. The coefficient of total extinction exhibits a single daily cycle with a maximum at 5–6 am and a minimum at 3 pm. The mean extinction contributions of the constituents, from high to low, were particle scattering (87.49%), particle absorption, gas absorption, and gas scattering. The extinction contribution of gas molecules was little more than 4.5%, far smaller than that of particles. Scattering by particles was the main contributor to extinction, especially in the morning and around midnight.

Graphical abstract

Keywords

Atmospheric visibility; Extinction properties; Extinction contributions; Particle scattering

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