Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/66558
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dc.contributorDepartment of Civil and Environmental Engineeringen_US
dc.creatorLyu, XPen_US
dc.creatorLiu, Men_US
dc.creatorGuo, Hen_US
dc.creatorLing, ZHen_US
dc.creatorWang, Yen_US
dc.creatorLouie, PKKen_US
dc.creatorLuk, CWYen_US
dc.date.accessioned2017-05-22T02:26:22Z-
dc.date.available2017-05-22T02:26:22Z-
dc.identifier.issn0048-9697en_US
dc.identifier.urihttp://hdl.handle.net/10397/66558-
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2016 Elsevier B.V. All rights reserved.en_US
dc.rights© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.rightsThe following publication Lyu, X. P., Liu, M., Guo, H., Ling, Z. H., Wang, Y., Louie, P. K. K., & Luk, C. W. Y. (2016). Spatiotemporal variation of ozone precursors and ozone formation in Hong Kong: Grid field measurement and modelling study. Science of the Total Environment, 569-570, 1341-1349 is available at https://doi.org/10.1016/j.scitotenv.2016.06.214en_US
dc.subjectVOCsen_US
dc.subjectSource apportionmenten_US
dc.subjectPhotochemical O-3en_US
dc.subjectEulerian box modelen_US
dc.subjectMCMen_US
dc.titleSpatiotemporal variation of ozone precursors and ozone formation in Hong Kong : grid field measurement and modelling studyen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1341en_US
dc.identifier.epage1349en_US
dc.identifier.volume569-570en_US
dc.identifier.doi10.1016/j.scitotenv.2016.06.214en_US
dcterms.abstractGrid field measurements of volatile organic compounds (VOCs) covering the entire territory of Hong Kong were simultaneously carried out twice daily on 27 September 2013 and 24 September 2014, respectively, to advance our understanding on the spatiotemporal variations of VOCs and ozone (O-3) formation, the factors controlling O-3 formation and the efficacy of a control measure in Hong Kong. From before to after the control measure on liquefied petroleum gas (LPG) fueled vehicles, the VOCs originated from LPG vehicle exhaust deceased from 41.3 +/- 1.2 mu g/m(3) (49.7 +/- 1.5%) to 32.8 +/- 1.4 mu g/m(3) (38.8 +/- 1.7%) (p < 0.05). In contrast, the contribution to VOCs made by gasoline and diesel vehicle exhaust and solvent usage increased (p < 0.05). VOCs and nitric oxide (NO) in LPG source experienced the highest reductions at the roadside sites, while the variations were not significant at the urban and new town sites (p > 0.05). For O-3 production, LPG vehicle exhaust generally made a negative contribution (-0.17 +/- 0.06 ppbv) at the roadside sites, however it turned to a slightly positive contribution (0.004 +/- 0.038 ppbv) after the control measure. At the urban sites, although the reductions of VOCs and NO were minor (p > 0.05), O-3 produced by LPG vehicle significantly reduced from 4.19 +/- 1.92 ppbv to 0.95 +/- 0.38 ppbv (p < 0.05). Meanwhile, O-3 produced by LPG at the new town sites remained stable. The analysis of O-3-precursor relationships revealed that alkenes and aromatics were the main species limiting roadside O-3 formation, while aromatics were the most predominant controlling factor at urban and new town sites. In contrast, isoprene and sometimes NOx limited the O-3 formation in rural environment.en_US
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationScience of the total environment, 1 Nov. 2016, v. 569-570, p. 1341-1349en_US
dcterms.isPartOfScience of the total environmenten_US
dcterms.issued2016-11-01-
dc.identifier.isiWOS:000382269000128-
dc.identifier.pmid27387808-
dc.identifier.ros2016001537-
dc.identifier.eissn1879-1026en_US
dc.identifier.rosgroupid2016001511-
dc.description.ros2016-2017 > Academic research: refereed > Publication in refereed journalen_US
dc.description.validate201804_a bcmaen_US
dc.description.oaAccepted Manuscripten_US
dc.identifier.FolderNumberRGC-B1-076-
dc.description.fundingSourceRGCen_US
dc.description.fundingSourceOthersen_US
dc.description.fundingTextNational Natural Science Foundation of Chinaen_US
dc.description.pubStatusPublisheden_US
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