Transport of black carbon aerosols from non-local sources: A case study in Shanghai--颗粒学报PARTICUOLOGY

Wang, H., Kang, Y., He, Q., & Chen, Y. (2015). Transport of black carbon aerosols from non-local sources: A case study in Shanghai. Particuology, 20, 89–93. https://doi.org/10.1016/j.partic.2014.07.003

Transport of black carbon aerosols from non-local sources: A case study in Shanghai

Hongqiang Wang ^a, Yanming Kang ^a, Qianshan He^{b c *}, Yonghang Chen ^a

a School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
b Shanghai Meteorological Service, Shanghai 200030, China
c Shanghai Key Laboratory of Meteorology and Health, Shanghai 200135, China

10.1016/j.partic.2014.07.003

Volume 20, June 2015, Pages 89-93

Received 29 April 2014, Revised 25 June 2014, Accepted 30 July 2014, Available online 6 November 2014.

E-mail: oxeye75@163.com; xinte@climate.sh.cn; oxeye75@gmail.com

Highlights

• Black carbon (BC) and meteorological data from Jan 2008 to Dec 2012 were measured in Shanghai.

• BC aerosol mass carried by winds of varying directions from non-local sources was estimated.

• Relationships between BC aerosols and wind speed were analyzed.

• Total BC mass contributed by non-local sources was 6404.05 t per year in Shanghai.

• BC mass transported into Shanghai in winter was about 35% of the whole year.

Abstract

Black carbon (BC) aerosol mass carried by winds of varying directions from non-local sources was estimated based on hourly measured data of BC mass concentration (C_BC) and meteorological parameters from January 2008 to December 2012 in Shanghai, and the relationship between annual average C_BCand wind speed was analyzed. The results show that the annual average C_BC decreased with wind speed for speeds exceeding 0.3 m/s. The relationship between the two was determined by a linear fit with correlation coefficient 0.88. Assuming BC aerosol mass of non-local sources transported by a southeast wind was zero, annual average BC concentrations (μg/m³) carried by winds of variable direction were 1.99 (southwest), 1.95 (west), 1.15 (northwest), 0.54 (south), 0.39 (north), 0.01 (northeast), and 0.01 (east). BC aerosol mass of non-local sources transported by wind to Shanghai was about 6404.05 t per year, among which the total contribution of southwest, west, and northwest winds was nearly 84%. The aerosol mass transported to Shanghai in winter accounted for 35% that of the entire year, and was greater than that of the other seasons.

Graphical abstract

Keywords

Black carbon aerosol; Non-local source; Mass concentration; Wind speed; Wind direction

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