Observations of aerosol optical properties at a coastal site in Hong Kong, South China

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dc.contributor.author Wang, Jiaping
dc.contributor.author Virkkula, Aki
dc.contributor.author Gao, Yuan
dc.contributor.author Lee, Shuncheng
dc.contributor.author Shen, Yicheng
dc.contributor.author Chi, Xuguang
dc.contributor.author Nie, Wei
dc.contributor.author Liu, Qiang
dc.contributor.author Xu, Zheng
dc.contributor.author Huang, Xin
dc.contributor.author Wang, Tao
dc.contributor.author Cui, Long
dc.contributor.author Ding, Aijun
dc.date.accessioned 2017-03-23T08:01:02Z
dc.date.available 2017-03-23T08:01:02Z
dc.date.issued 2017-02-22
dc.identifier.citation Wang , J , Virkkula , A , Gao , Y , Lee , S , Shen , Y , Chi , X , Nie , W , Liu , Q , Xu , Z , Huang , X , Wang , T , Cui , L & Ding , A 2017 , ' Observations of aerosol optical properties at a coastal site in Hong Kong, South China ' , Atmospheric Chemistry and Physics , vol. 17 , no. 4 , pp. 2653-2671 . https://doi.org/10.5194/acp-17-2653-2017
dc.identifier.other PURE: 81914659
dc.identifier.other PURE UUID: 98847f8b-28b7-41a9-9fdf-71ada24babd7
dc.identifier.other WOS: 000395094200001
dc.identifier.other Scopus: 85013498065
dc.identifier.uri http://hdl.handle.net/10138/178121
dc.description.abstract Temporal variations in aerosol optical properties were investigated at a coastal station in Hong Kong based on the field observation from February 2012 to February 2015. At 550 nm, the average light-scattering (151 +/- 100Mm(-1) / and absorption coefficients (8.3 +/- 6.1Mm(-1) / were lower than most of other rural sites in eastern China, while the single-scattering albedo (SSA = 0.93 +/- 0.05) was relatively higher compared with other rural sites in the Pearl River Delta (PRD) region. Correlation analysis confirmed that the darkest aerosols were smaller in particle size and showed strong scattering wavelength dependencies, indicating possible sources from fresh emissions close to the measurement site. Particles with D-p of 200-800 nm were less in number, yet contributed the most to the light-scattering coefficients among submicron particles. In summer, both Delta BC / Delta CO and SO2 / BC peaked, indicating the impact of nearby combustion sources on this site. Multi-year backward Lagrangian particle dispersion modeling (LPDM) and potential source contribution (PSC) analysis revealed that these particles were mainly from the air masses that moved southward over Shenzhen and urban Hong Kong and the polluted marine air containing ship exhausts. These fresh emission sources led to low SSA during summer months. For winter and autumn months, contrarily, Delta BC / Delta CO and SO2 / BC were relatively low, showing that the site was more under influence of well-mixed air masses from long-range transport including from South China, East China coastal regions, and aged aerosol transported over the Pacific Ocean and Taiwan, causing stronger abilities of light extinction and larger variability of aerosol optical properties. Our results showed that ship emissions in the vicinity of Hong Kong could have visible impact on the light-scattering and absorption abilities as well as SSA at Hok Tsui. en
dc.format.extent 19
dc.language.iso eng
dc.relation.ispartof Atmospheric Chemistry and Physics
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject AIR-POLLUTION
dc.subject SURFACE OZONE
dc.subject 114 Physical sciences
dc.title Observations of aerosol optical properties at a coastal site in Hong Kong, South China en
dc.type Article
dc.contributor.organization Department of Physics
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.5194/acp-17-2653-2017
dc.relation.issn 1680-7316
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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