Source apportionment of black carbon and the feedback effect on the meteorological factors in Beijing, China
- PDF / 1,799,270 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 75 Downloads / 208 Views
RESEARCH ARTICLE
Source apportionment of black carbon and the feedback effect on the meteorological factors in Beijing, China Wei Wen 1,3
&
Xin Ma 2 & Chunwei Guo 3 & Peng Wei 4 & Xiujuan Zhao 3 & Jing Xu 3
Received: 11 March 2020 / Accepted: 23 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Black carbon (BC) is a major light-absorbing component in the atmosphere and plays an important role in aerosol radiative forcing. In this study, the combination of monitoring data and the WRF-Chem model was used to study the source apportionment of BC in China during January 2017. Meanwhile, the aerosol-radiation interaction (ARI) effect of BC was also simulated. We found that the average BC/PM2.5 ratios were 4.8%, 4.2%, and 3.8% in Shijiazhuang, Tangshan, and Beijing, respectively. The source apportionment suggested that traffic emissions played a dominant role in the BC concentration over Beijing. The traffic, residential, industrial, and power contributions accounted for 41%, 32%, 25%, and 2% of total concentration, respectively. The BC concentration in Beijing was also affected by regional transport. During January, the contributions of monthly regional transport to BC and PM2.5 concentrations in Beijing were 41% and 49%, respectively. BC emissions decreased downward shortwave radiation (SWDOWN) at the surface, leading to a decrease in temperature. As a result, the planetary boundary layer height (PBLH) development was suppressed and the relative humidity increased. The stable meteorological conditions suppressed the dispersion of air pollutants and increased BC concentrations. Traffic emissions decreased the monthly SWDOWN by approximately 2.2 W/m2, decreased 2 m temperature (T2) by approximately 0.1 °C, increased 2 m relative humidity (RH2) by approximately 0.5%, and decreased PBLH by approximately 4.4 m. Keywords Black carbon . Source apportionment . Aerosol-radiation interaction . Meteorological factors
Introduction Black carbon (BC) is a major light-absorbing component in atmospheric particulate matter and a highly condensed carbonaceous residue that arises from incomplete combustion (Bond et al. 2004; Pan et al. 2011; Lu et al. 2020). BC is also known as elemental carbon, which is formed during the combustion of fossil fuels and emitted from vehicles and various Responsible Editor: Gerhard Lammel * Xin Ma [email protected] 1
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
National Meteorological Center, Beijing 100081, China
3
Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China
4
Chinese Research Academy of Environment Science, Beijing 100012, China
types of biomass fuels, from residential wood combustion to large forest fires (Ramanathan and Carmichael 2008; Briggs and Long 2016; Li et al. 2016). The annual BC emissions in China were estimated to have increased from 0.87 Tg in 1980 to 1.88 Tg in 2009, representing ~ 50% of the emissions in Asia and ~ 19% of global B
Data Loading...
