Enhancement in Particulate Organic Nitrogen and Light Absorption of Humic-Like Substances over Tibetan Plateau Due to Long-Range Transported Biomass Burning Emissions

Wang, Yujue; Hu, Min; Lin, Peng; Tan, Tianyi; Li, Mengren; Xu, Nan; Zheng, Jie; Du, Zhuofei; Qin, Yanhong; Wu, Yusheng; Lü, Sihua; Song, Yu; Wu, Zhijun; Guo, Song; Zeng, Liangwei; Huang, Xiaofeng; He, Lingyan

doi:10.1021/acs.est.9b06152

Cited by 75 publications

(80 citation statements)

References 83 publications

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“…This indicates a more significant wavelength dependence of biomass burning brown carbon aerosols than any of OOA and HOA. As a matter of fact, OA emitted from primary biomass burning contains the largest part of brown carbon chromophores which strongly absorb light at near-UV wavelengths (Huang et al, 2018;Kumar et al, 2018;Lu et al, 2015;Wang et al, 2019). Moreover, the stronger wavelength dependence obtained for MO-BBOA (compared to LO-BBOA, which can be considered as fresher emissions) is consistent with the features of primary vs. secondary biomass burning OA (or oxidized primary OA) reported by Saleh et al (2014).…”

Section: Sources Of Organic Aerosol At Sirtasupporting

confidence: 78%

Substantial brown carbon emissions from wintertime residential wood burning over France

Zhang

Albinet

Petit

et al. 2020

Science of The Total Environment

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Brown carbon (BrC) is known to absorb light at subvisible wavelengths but its optical properties and sources are still poorly documented, leading to large uncertainties in climate studies. Here, we show its major wintertime contribution to total aerosol absorption at 370 nm (18-42%) at 9 different French sites. Moreover, an excellent correlation with levoglucosan (r 2 = 0.9 and slope = 22.2 at 370 nm), suggesting important contribution of wood burning emissions to ambient BrC aerosols in France. At all sites, BrC peaks were mainly observed during late evening, linking to local intense residential wood burning during this time period. Furthermore, the geographic origin analysis also highlighted the high potential contribution of local and/or small-regional emissions to BrC. Focusing on the Paris region, twice higher BrC mass absorption efficiency value was obtained for less oxidized biomass burning organic aerosols (BBOA) compared to more oxidized BBOA (e.g., about 4.9 ± 0.2 vs. 2.0 ± 0.1 m 2 g −1 , respectively, at 370 nm). Finally, the BBOA direct radiative effect was found to be 40% higher

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Section: Sources Of Organic Aerosol At Sirtasupporting

confidence: 78%

Substantial brown carbon emissions from wintertime residential wood burning over France

Zhang

Albinet

Petit

et al. 2020

Science of The Total Environment

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“…Hence, there is a strong possibility that, those abundant aged BC particles observed in Period I are originated from the fire smokes in South and Southeast Asia. This deduction is in accordance with the conclusions given by Zheng et al (2017) and Wang et al (2019). Based on their chemistry-related evidence, those abundant aged BC are believed to have an origin of biomass burning.…”

Section: Observational Evidence For the Transport Of Biomass Burning supporting

confidence: 91%

“…In our previous publication, Wang et al (2019) have showed that the light absorption at short wavelength by brown carbon is enhanced because of the transport of BB plumes during Period I. In addition to that research, this study reveals that the light absorption by black carbon, which can strongly absorb light at visible and infrared wavelength, is also strongly enhanced by the transported BB plumes.…”

Section: Strong Enhancement Of the Light Absorption Due To The Transpsupporting

confidence: 72%

Strong Light Absorption Induced by Aged Biomass Burning Black Carbon over the Southeastern Tibetan Plateau in Pre-monsoon Season

Tan

et al. 2020

Preprint

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Abstract. During the pre-monsoon season, biomass burning (BB) activities are intensive in southern Asia. Facilitated by westerly circulation, those BB plumes can be transported to the Tibetan Plateau (TP). Black carbon (BC), the main aerosol species in BB emissions, is an important climate warming agent, and its absorbing property strongly depends on its size distribution and mixing state. To elucidate the influence of those transported BB plumes on the TP, a field campaign was conducted on the southeast edge of the TP during the pre-monsoon season. It was found that the transported BB plumes substantially increased the number concentration of the atmospheric BC particles by 13 times, and greatly elevated the number fraction of thickly-coated BC from 52 % up to 91 %. Those transported BC particles had slightly larger core size and much thicker coatings than the background BC particles. However, the coating mass was not evenly distributed on BC particles with different sizes. The smaller BC cores were found to have larger shell/core ratios than the larger cores. Besides, the transported BB plumes strongly affected the vertical variation of the BC's abundance and mixing state, resulting in a higher concentration, larger number fraction and higher aging degree of BC particles in the upper atmosphere. Resulted from both increase of BC loading and aging degree, the transported BB plumes eventually enhanced the total light absorption by 15 times, in which 21 % was contributed by the BC aging and 79 % was contributed from the increase of BC mass. Particularly, the light absorption enhancement induced by the aging process during long-range transport has far exceeded the background aerosol light absorption, which implicates a significant influence of BC aging on climate warming over the TP region.

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“…Aging of aerosols is another possible reason that leads to high OC/EC ratios (Zhang et al., 2019). According to the backward trajectories (Figure ), it was likely to be the influence of aerosols transported from South Asia (Wang et al., 2019).…”

Section: Atmospheric Aerosol Chemical Compositionsmentioning

confidence: 99%

Unexpected High Absorption of Atmospheric Aerosols Over a Western Tibetan Plateau Site in Summer

et al. 2021

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The assessment of atmospheric aerosol radiative effects in the Tibetan Plateau (TP) suffers from large uncertainties due to limited understanding of aerosol physicochemical properties. To quantify aerosol optical properties, size distributions, and chemical compositions in the western TP, an intensive field campaign was carried out at Shiquanhe National Reference Climatological Station from July 8 to August 2, 2019. Unexpected low single scattering albedo (SSA) at 870 nm was found for the fine aerosols with an average value of 0.73 ± 0.18. SSA was even lower than 0.60 in the morning when fine aerosols peaked, indicating high absorption of the fine aerosols induced by anthropogenic activities. Coarse mode aerosols accounted for 70.58% ± 14.98% of the total volume concentration and mineral dust was the most abundant species in total suspended particles with a mass fraction of 48.7%. Fine mode aerosol concentrations showed little dependence on wind speed while coarse mode aerosols and metallic element concentrations exhibited strong positive correlations with wind speed, indicating the importance of wind‐blown dust particles. The present study for the first time quantified key aerosol parameters in the western TP and unexpected high absorption of atmospheric aerosols were found over the site in summer. Our results suggest the need to carefully consider the radiative effects caused by aerosol absorption in the TP region.

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Enhancement in Particulate Organic Nitrogen and Light Absorption of Humic-Like Substances over Tibetan Plateau Due to Long-Range Transported Biomass Burning Emissions

Cited by 75 publications

References 83 publications

Substantial brown carbon emissions from wintertime residential wood burning over France

Substantial brown carbon emissions from wintertime residential wood burning over France

Strong Light Absorption Induced by Aged Biomass Burning Black Carbon over the Southeastern Tibetan Plateau in Pre-monsoon Season

Unexpected High Absorption of Atmospheric Aerosols Over a Western Tibetan Plateau Site in Summer

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