TY - JOUR
T1 - High contributions of fossil fuel sources to char-EC/soot-EC at a high-altitude site
T2 - Direct radiative effects and transport pathway
AU - Liu, Huikun
AU - Wang, Qiyuan
AU - Qu, Yao
AU - Tian, Jie
AU - Li, Li
AU - Ma, Nan
AU - Zhou, Yaqing
AU - Ran, Wei Kang
AU - Su, Hui
AU - Han, Yongming
AU - Pavese, Giulia
AU - Cao, Junji
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2024/4/1
Y1 - 2024/4/1
N2 - Char-EC and soot-EC in the atmosphere produced from different fuel combustion have distinct optical properties which lead to different radiative forcing. Pollutants transported into high-altitude environment could have a long-lasting radiative effect due to being free of deposition. In this study, the mass absorption cross-section (MAC), the sources, transport pathways and the direct radiative effects (DREs) of soot-EC and char-EC were investigated at a peak of Mountain Hua (Mt. Hua) in China. The measurement results showed that soot-EC and char-EC account for 15.7 % and 84.3 % of EC, respectively. The mean MAC (λ = 633 nm) of soot-EC (13.7 ± 3.8 m2/g) was much higher than that of char-EC (5.4 ± 2.5 m2/g), indicating a stronger light absorption ability for soot-EC. During the study period, 62.1 % char-EC was from anthracite chunk coal, 24.3 % of it from liquid fuel combustion. By contrast, 59.0 % soot-EC from liquid fuel combustion and 36.6 % of it from anthracite chunk coal. EC (both char-EC and soot-EC) produced from anthracite chunk coal reached the peak of the Mt. Hua primarily through the raising of the planetary boundary layer (PBL), while the EC produced from liquid fuel arrived the peak mainly by the regional transport above the PBL of the site. Although soot-EC has a stronger ability (2.8 times higher) to absorb the light compared with char-EC, its DRE (5.7 ± 3.9 W m−2) was lower than that of char-EC (11.6 ± 6.9 W m−2) due to the smaller mass quantity. Liquid fuel consumption contributed 3.5 ± 2.9 W m−2 DRE of soot-EC, while the combustion of anthracite chunk coal contributed 7.5 ± 5.7 W m−2 DRE of char-EC. This study highlights the differences in DREs of soot-EC and char-EC from fossil fuel combustion and the DRE mass efficiency of soot-EC and char-EC. The results emphasize the divergent climate warming effects caused by the combustion of different fossil fuels and imply that setting path to a green transition of energy use would benefit reducing the EC perturbation to the radiation balance of earth-atmosphere.
AB - Char-EC and soot-EC in the atmosphere produced from different fuel combustion have distinct optical properties which lead to different radiative forcing. Pollutants transported into high-altitude environment could have a long-lasting radiative effect due to being free of deposition. In this study, the mass absorption cross-section (MAC), the sources, transport pathways and the direct radiative effects (DREs) of soot-EC and char-EC were investigated at a peak of Mountain Hua (Mt. Hua) in China. The measurement results showed that soot-EC and char-EC account for 15.7 % and 84.3 % of EC, respectively. The mean MAC (λ = 633 nm) of soot-EC (13.7 ± 3.8 m2/g) was much higher than that of char-EC (5.4 ± 2.5 m2/g), indicating a stronger light absorption ability for soot-EC. During the study period, 62.1 % char-EC was from anthracite chunk coal, 24.3 % of it from liquid fuel combustion. By contrast, 59.0 % soot-EC from liquid fuel combustion and 36.6 % of it from anthracite chunk coal. EC (both char-EC and soot-EC) produced from anthracite chunk coal reached the peak of the Mt. Hua primarily through the raising of the planetary boundary layer (PBL), while the EC produced from liquid fuel arrived the peak mainly by the regional transport above the PBL of the site. Although soot-EC has a stronger ability (2.8 times higher) to absorb the light compared with char-EC, its DRE (5.7 ± 3.9 W m−2) was lower than that of char-EC (11.6 ± 6.9 W m−2) due to the smaller mass quantity. Liquid fuel consumption contributed 3.5 ± 2.9 W m−2 DRE of soot-EC, while the combustion of anthracite chunk coal contributed 7.5 ± 5.7 W m−2 DRE of char-EC. This study highlights the differences in DREs of soot-EC and char-EC from fossil fuel combustion and the DRE mass efficiency of soot-EC and char-EC. The results emphasize the divergent climate warming effects caused by the combustion of different fossil fuels and imply that setting path to a green transition of energy use would benefit reducing the EC perturbation to the radiation balance of earth-atmosphere.
KW - Anthracite chunk coal
KW - Char-EC
KW - Direct radiative effects
KW - Liquid fuel
KW - Optical properties
KW - Soot-EC
UR - https://www.scopus.com/pages/publications/85180557330
U2 - 10.1016/j.fuel.2023.130632
DO - 10.1016/j.fuel.2023.130632
M3 - 文章
AN - SCOPUS:85180557330
SN - 0016-2361
VL - 361
JO - Fuel
JF - Fuel
M1 - 130632
ER -
