TY - JOUR
T1 - Biomass burning influences determination based on PM2.5 chemical composition combined with fire counts at southeastern Tibetan Plateau during pre-monsoon period
AU - Zhang, Ningning
AU - Cao, Junji
AU - Wang, Qiyuan
AU - Huang, Rujin
AU - Zhu, Chongshu
AU - Xiao, Shun
AU - Wang, Linlin
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - Influences of biomass burning (BB) on a high altitude site were investigated by collecting fine particulate matter (PM2.5) samples from 29 March to 27 April of 2012 at Mt. Yulong (4500 m above sea level), and analyzing them for selected chemical species including water soluble ions (WSIs), organic carbon (OC), elemental carbon (EC), polycyclic aromatic hydrocarbons (PAHs) and n-alkanes. The mean PM2.5 mass loading for the study was 6.30 ± 4.90 μg m−3, and 15.48 ± 2.82 μg m−3 and 1.75 ± 0.41 μg m−3 for a high and a low PM episode, respectively. WSIs accounted for 62% of the total mass, and SO4 2− was the dominant anion and NH4 + was the main cation. PAHs were mainly 3 ring compounds, fluorene (Flo) and phenanthrene (Phe) together accounted for 54% of the total PAHs. For n-alkanes, n-Nonacosane (C29) concentration was the highest with the value of 1.09 ± 1.18 ng m−3, following is n-Hentriacontane (C31) and n-Heptacosane (C27) suggested that n-alkane in our samples were mainly contributed by biogenic sources. BB emission was confirmed by the diagnostic ratios, and it also had a significant influence on aerosol optical depth (AOD) distribution and enhances the concentration of most species, especially for OC, K+ and EC. Significant relationships were found between daily fire counts and BB species, and correlation coefficients (r) for mass, K+, OC, and EC were 0.58, 0.57, 0.53 and 0.60 (n = 29, P < 0.01), respectively. It indicated that daily fire counts can advance our understanding of how biomass burning affect aerosols and air quality at a high-altitude site.
AB - Influences of biomass burning (BB) on a high altitude site were investigated by collecting fine particulate matter (PM2.5) samples from 29 March to 27 April of 2012 at Mt. Yulong (4500 m above sea level), and analyzing them for selected chemical species including water soluble ions (WSIs), organic carbon (OC), elemental carbon (EC), polycyclic aromatic hydrocarbons (PAHs) and n-alkanes. The mean PM2.5 mass loading for the study was 6.30 ± 4.90 μg m−3, and 15.48 ± 2.82 μg m−3 and 1.75 ± 0.41 μg m−3 for a high and a low PM episode, respectively. WSIs accounted for 62% of the total mass, and SO4 2− was the dominant anion and NH4 + was the main cation. PAHs were mainly 3 ring compounds, fluorene (Flo) and phenanthrene (Phe) together accounted for 54% of the total PAHs. For n-alkanes, n-Nonacosane (C29) concentration was the highest with the value of 1.09 ± 1.18 ng m−3, following is n-Hentriacontane (C31) and n-Heptacosane (C27) suggested that n-alkane in our samples were mainly contributed by biogenic sources. BB emission was confirmed by the diagnostic ratios, and it also had a significant influence on aerosol optical depth (AOD) distribution and enhances the concentration of most species, especially for OC, K+ and EC. Significant relationships were found between daily fire counts and BB species, and correlation coefficients (r) for mass, K+, OC, and EC were 0.58, 0.57, 0.53 and 0.60 (n = 29, P < 0.01), respectively. It indicated that daily fire counts can advance our understanding of how biomass burning affect aerosols and air quality at a high-altitude site.
KW - Aerosols
KW - Biomass burning
KW - Chemical composition
KW - Fire counts
KW - Mt. Yulong
UR - https://www.scopus.com/pages/publications/85042754186
U2 - 10.1016/j.atmosres.2018.02.018
DO - 10.1016/j.atmosres.2018.02.018
M3 - 文章
AN - SCOPUS:85042754186
SN - 0169-8095
VL - 206
SP - 108
EP - 116
JO - Atmospheric Research
JF - Atmospheric Research
ER -