Optical properties of atmospheric fine particles near Beijing during the HOPE-J3A campaign

CORA will be unavailable from 08:00- 09:00 for regular maintenance on Tuesday, 28th May 2019. Apologies for any inconvenience this may cause.

Show simple item record

dc.contributor.author Xu, Xuezhe
dc.contributor.author Zhao, Weixiong
dc.contributor.author Zhang, Qilei
dc.contributor.author Wang, Shuo
dc.contributor.author Fang, Bo
dc.contributor.author Chen, Weidong
dc.contributor.author Venables, Dean S.
dc.contributor.author Wang, Xinfeng
dc.contributor.author Pu, Wei
dc.contributor.author Wang, Xin
dc.contributor.author Gao, Xiaoming
dc.contributor.author Zhang, Weijun
dc.date.accessioned 2017-06-22T13:55:54Z
dc.date.available 2017-06-22T13:55:54Z
dc.date.issued 2016-05-26
dc.identifier.citation Xu, X., Zhao, W., Zhang, Q., Wang, S., Fang, B., Chen, W., Venables, D. S., Wang, X., Pu, W., Wang, X., Gao, X. and Zhang, W. (2016) 'Optical properties of atmospheric fine particles near Beijing during the HOPE-J3A campaign', Atmospheric Chemistry and Physics, 16, pp.6421-6439. doi: 10.5194/acp-16-6421-2016 en
dc.identifier.volume 16
dc.identifier.startpage 6421
dc.identifier.endpage 6439
dc.identifier.issn 1680-7324
dc.identifier.uri http://hdl.handle.net/10468/4175
dc.identifier.doi 10.5194/acp-16-6421-2016
dc.description.abstract The optical properties and chemical composition of PM1.0 particles in a suburban environment (Huairou) near the megacity of Beijing were measured during the HOPE-J3A (Haze Observation Project Especially for Jing–Jin–Ji Area) field campaign. The campaign covered the period November 2014 to January 2015 during the winter coal heating season. The average values and standard deviations of the extinction, scattering, absorption coefficients, and the aerosol single scattering albedo (SSA) at λ = 470 nm during the measurement period were 201 ± 240, 164 ± 202, 37 ± 43 Mm−1, and 0.80 ± 0.08, respectively. The average values for the real and imaginary components of the effective complex refractive index (CRI) over the campaign were 1.40 ± 0.06 and 0.03 ± 0.02, while the average mass scattering and absorption efficiencies (MSEs and MAEs) of PM1.0 were 3.6 and 0.7 m2 g−1, respectively. Highly time-resolved air pollution episodes clearly show the dramatic evolution of the PM1.0 size distribution, extensive optical properties (extinction, scattering, and absorption coefficients), and intensive optical properties (SSA and CRI) during haze formation, development, and decline. Time periods were classified into three different pollution levels (clear, slightly polluted, and polluted) for further analysis. It was found that (1) the relative contributions of organic and inorganic species to observed aerosol composition changed significantly from clear to polluted days: the organic mass fraction decreased from 50 to 43 % while the proportion of sulfates, nitrates, and ammonium increased strongly from 34 to 44 %. (2) Chemical apportionment of extinction, calculated using the IMPROVE algorithm, tended to underestimate the extinction compared to measurements. Agreement with measurements was improved by modifying the parameters to account for enhanced absorption by elemental carbon (EC). Organic mass was the largest contributor (52 %) to the total extinction of PM1.0, while EC, despite its low mass concentration of ∼ 4 %, contributed about 17 % to extinction. When the air quality deteriorated, the contribution of nitrate aerosol increased significantly (from 15 % on clear days to 22 % on polluted days). (3) Under polluted conditions, the average MAEs of EC were up to 4 times as large as the reference MAE value for freshly generated black carbon (BC). The temporal pattern of MAE values was similar to that of the OC / EC ratio, suggesting that non-BC absorption from secondary organic aerosol also contributes to particle absorption. en
dc.description.sponsorship National Natural Science Foundation of China (41330424); Natural Science Foundation of Anhui Province (1508085J03); Chinese Academy of Sciences (KJZDEW-TZ-G06–01); China Special Fund for Meteorological Research in the Public Interest (GYHY201406039).; French National Research Agency (Programme d’Investissement d’Avenir” ( ANR-10-LABX-005) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher European Geosciences Union en
dc.relation.uri http://www.atmos-chem-phys.net/16/6421/2016/
dc.rights © 2016, the Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. en
dc.rights.uri https://creativecommons.org/licenses/by/3.0/ en
dc.subject Optical en
dc.subject Atmospheric fine particles en
dc.subject Beijing en
dc.subject HOPE-J3A campaign en
dc.title Optical properties of atmospheric fine particles near Beijing during the HOPE-J3A campaign en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Dean S. Venables, Chemistry and Environmental Research Institute, University College Cork, Cork, Ireland. +353-21-490-3000 Email: d.venables@ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder National Natural Science Foundation of China
dc.contributor.funder Natural Science Foundation of Anhui Province
dc.contributor.funder China Special Fund for Meteorological Research in the Public Interest
dc.contributor.funder Chinese Academy of Sciences
dc.contributor.funder Agence Nationale de la Recherche
dc.description.status Peer reviewed en
dc.identifier.journaltitle Atmospheric Chemistry and Physics en
dc.internal.IRISemailaddress d.venables@ucc.ie en


Files in this item

This item appears in the following Collection(s)

Show simple item record

© 2016, the Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. Except where otherwise noted, this item's license is described as © 2016, the Author(s). This work is distributed under the Creative Commons Attribution 3.0 License.
This website uses cookies. By using this website, you consent to the use of cookies in accordance with the UCC Privacy and Cookies Statement. For more information about cookies and how you can disable them, visit our Privacy and Cookies statement