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dc.contributor.authorSingh, Vikas
dc.contributor.authorSokhi, Ranjeet
dc.contributor.authorKukkonen, Jaakko
dc.date.accessioned2020-07-09T00:07:00Z
dc.date.available2020-07-09T00:07:00Z
dc.date.issued2020-02-01
dc.identifier.citationSingh , V , Sokhi , R & Kukkonen , J 2020 , ' An approach to predict population exposure to ambient air PM2.5 concentrations and its dependence on population activity for the megacity London ' , Environmental Pollution , vol. 257 , 113623 . https://doi.org/10.1016/j.envpol.2019.113623
dc.identifier.issn0269-7491
dc.identifier.otherPURE: 17704470
dc.identifier.otherPURE UUID: b0eed872-ca49-4717-8d2f-e53e5aa5b356
dc.identifier.otherScopus: 85075900486
dc.identifier.urihttp://hdl.handle.net/2299/22945
dc.description© 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/.
dc.description.abstractA comprehensive modelling approach has been developed to predict population exposure to the ambient air PM2.5 concentrations in different microenvironments in London. The modelling approach integrates air pollution dispersion and exposure assessment, including treatment of the locations and time activity of the population in three microenvironments, namely, residential, work and transport, based on national demographic information. The approach also includes differences between urban centre and suburban areas of London by taking account of the population movements and the infiltration of PM2.5 from outdoor to indoor. The approach is tested comprehensively by modelling ambient air concentrations of PM2.5 at street scale for the year 2008, including both regional and urban contributions. Model analysis of the exposure in the three microenvironments shows that most of the total exposure, 85%, occurred at home and work microenvironments and 15% in the transport microenvironment. However, the annual population weighted mean (PWM) concentrations of PM2.5 for London in transport microenvironments were almost twice as high (corresponding to 13-20 µg/m3) as those for home and work environments (7-12 µg/m3). Analysis has shown that the PWM PM2.5 concentrations in central London were almost 20% higher than in the surrounding suburban areas. Moreover, the population exposure in the central London per unit area was almost three times higher than that in suburban regions. The exposure resulting from all activities, including outdoor to indoor infiltration, was about 20% higher, when compared with the corresponding value obtained assuming inside home exposure for all times. The exposure assessment methodology used in this study predicted approximately over one quarter (-28%) lower population exposure, compared with using simply outdoor concentrations at residential locations. An important implication of this study is that for estimating population exposure, one needs to consider the population movements, and the infiltration of pollution from outdoors to indoors.en
dc.format.extent12
dc.language.isoeng
dc.relation.ispartofEnvironmental Pollution
dc.titleAn approach to predict population exposure to ambient air PM2.5 concentrations and its dependence on population activity for the megacity Londonen
dc.contributor.institutionCentre for Atmospheric and Climate Physics Research
dc.contributor.institutionAtmospheric Dynamics & Air Quality
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.date.embargoedUntil2020-11-15
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1016/j.envpol.2019.113623
rioxxterms.typeJournal Article/Review


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