The influence of photochemical aging on light absorption of atmospheric black carbon and aerosol single-scattering albedo

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dc.contributor.authorXu, X.
dc.contributor.authorZhao, W.
dc.contributor.authorQian, X.
dc.contributor.authorWang, S.
dc.contributor.authorFang, B.
dc.contributor.authorZhang, Q.
dc.contributor.authorZhang, W.
dc.contributor.authorVenables, Dean S.
dc.contributor.authorChen, W.
dc.contributor.authorHuang, Y.
dc.contributor.authorDeng, X.
dc.contributor.authorWu, B.
dc.contributor.authorLin, X.
dc.contributor.authorZhao, S.
dc.contributor.authorTong, Y.
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.contributor.funderNatural Science Foundation of Anhui Provinceen
dc.contributor.funderYouth Innovation Promotion Association of the Chinese Academy of Sciencesen
dc.contributor.funderChina Special Fund for Meteorological Research in the Public Interesten
dc.date.accessioned2019-06-24T11:51:53Z
dc.date.available2019-06-24T11:51:53Z
dc.date.issued2018-11-29
dc.description.abstractCoating enhancement of black carbon (BC) light absorption (Eabs) is a large uncertainty in modelling direct radiative forcing (DRF) by BC. Reported Eabs values after atmospheric aging vary widely and the mechanisms responsible for enhancing BC absorption remain elusive. Here, we report on the direct field measurement of size-resolved mixing state, Eabs, and aerosol single-scattering albedo (SSA) at λ = 532 nm at a rural site in east China from June to July 2016. Strong diurnal variability of Eabs, SSA, and Ox (Ox = NO2 + O3, a proxy for atmospheric photochemical aging) was observed. A method that combined Eabs and SSA was developed to retrieve the fraction contribution of BC absorption (fBC), lensing-driven enhancement (fLens), as well as the fractional contribution of coating absorption (fraction absorption contribution (fShell), the coated shell diameter (DShell) and the imaginary part of the complex refractive index (CRI) of the shell (kShell)). Parameterization of Eabs and SSA captures much of the influence of BC coating and the particle absorption. In our measurements at this site, the results showed that the absorption amplification depended on the coating thickness and the absorption of coating materials, and photochemistry plays a role in modifying the absorption of BC-containing particles. The lensing-driven enhancement was reduced by light absorption of the shell. One implication of these findings is that the contribution of light-absorbing organic compounds (brown carbon, BrC) at a longer aging time should be included in climate models.en
dc.description.sponsorship41330424; 1508085J03; GYHY201406039en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationXu, X., Zhao, W., Qian, X., Wang, S., Fang, B., Zhang, Q., Zhang, W., Venables, D.S., Chen, W., Huang, Y. and Deng, X., 2018. The influence of photochemical aging on light absorption of atmospheric black carbon and aerosol single-scattering albedo. Atmospheric Chemistry and Physics, 18(23), 16829-16844. DOI: 10.5194/acp-18-16829-2018en
dc.identifier.doi10.5194/acp-18-16829-2018en
dc.identifier.endpage16844en
dc.identifier.issn1680-7324
dc.identifier.issued23en
dc.identifier.journaltitleAtmospheric Chemistry and Physicsen
dc.identifier.startpage16829en
dc.identifier.urihttps://hdl.handle.net/10468/8095
dc.identifier.volume18en
dc.language.isoenen
dc.publisherEGUen
dc.relation.urihttps://www.atmos-chem-phys.net/18/16829/2018/
dc.rights© 2018 The Author(s). This work is distributed under the Creative Commons Attribution 4.0 License.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectPhoto-chemical agingen
dc.subjectLight absorptionen
dc.subjectAtmospheric black carbonen
dc.subjectSingle-scattering albedoen
dc.subjectAerosolen
dc.titleThe influence of photochemical aging on light absorption of atmospheric black carbon and aerosol single-scattering albedoen
dc.typeArticle (peer-reviewed)en
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