Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/75887
DC Field | Value | Language |
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dc.contributor | Department of Civil and Environmental Engineering | - |
dc.creator | Wang, Y | - |
dc.creator | Wang, H | - |
dc.creator | Guo, H | - |
dc.creator | Lyu, XP | - |
dc.creator | Cheng, HR | - |
dc.creator | Ling, ZH | - |
dc.creator | Louie, PKK | - |
dc.creator | Simpson, IJ | - |
dc.creator | Meinardi, S | - |
dc.creator | Blake, DR | - |
dc.date.accessioned | 2018-05-10T02:54:51Z | - |
dc.date.available | 2018-05-10T02:54:51Z | - |
dc.identifier.issn | 1680-7316 | en_US |
dc.identifier.uri | http://hdl.handle.net/10397/75887 | - |
dc.language.iso | en | en_US |
dc.publisher | Copernicus GmbH | en_US |
dc.rights | © Author(s) 2017. This is an open access article distributed under the Creative Commons Attribution 3.0 License (https://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | en_US |
dc.rights | The following publication: Wang, Y., Wang, H., Guo, H., Lyu, X., Cheng, H., Ling, Z., Louie, P. K. K., Simpson, I. J., Meinardi, S., and Blake, D. R.: Long-term O3–precursor relationships in Hong Kong: field observation and model simulation, Atmos. Chem. Phys., 17, 10919-10935 is available at https://doi.org/10.5194/acp-17-10919-2017, 2017. | en_US |
dc.title | Long-term O-3-precursor relationships in Hong Kong : field observation and model simulation | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.spage | 10919 | en_US |
dc.identifier.epage | 10935 | en_US |
dc.identifier.volume | 17 | en_US |
dc.identifier.issue | 18 | en_US |
dc.identifier.doi | 10.5194/acp-17-10919-2017 | en_US |
dcterms.abstract | Over the past 10 years (2005-2014), ground-level O-3 in Hong Kong has consistently increased in all seasons except winter, despite the yearly reduction of its precursors, i.e. nitrogen oxides (NOx = NO + NO2), total volatile organic compounds (TVOCs), and carbon monoxide (CO). To explain the contradictory phenomena, an observation-based box model (OBM) coupled with CB05 mechanism was applied in order to understand the influence of both locally produced O-3 and regional transport. The simulation of locally produced O-3 showed an increasing trend in spring, a decreasing trend in autumn, and no changes in summer and winter. The O-3 increase in spring was caused by the net effect of more rapid decrease in NO titration and unchanged TVOC reactivity despite decreased TVOC mixing ratios, while the decreased local O-3 formation in autumn was mainly due to the reduction of aromatic VOC mixing ratios and the TVOC reactivity and much slower decrease in NO titration. However, the decreased in situ O-3 formation in autumn was overridden by the regional contribution, resulting in elevated O-3 observations. Furthermore, the OBM-derived relative incremental reactivity indicated that the O-3 formation was VOC-limited in all seasons, and that the long-term O-3 formation was more sensitive to VOCs and less to NOx and CO in the past 10 years. In addition, the OBM results found that the contributions of aromatics to O-3 formation decreased in all seasons of these years, particularly in autumn, probably due to the effective control of solvent-related sources. In contrast, the contributions of alkenes increased, suggesting a continuing need to reduce traffic emissions. The findings provide updated information on photochemical pollution and its impact in Hong Kong. | - |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Atmospheric chemistry and physics, 2017, v. 17, no. 18, p. 10919-10935 | - |
dcterms.isPartOf | Atmospheric chemistry and physics | - |
dcterms.issued | 2017 | - |
dc.identifier.isi | WOS:000410778000001 | - |
dc.identifier.scopus | 2-s2.0-85022074712 | - |
dc.identifier.eissn | 1680-7324 | en_US |
dc.identifier.rosgroupid | 2017003441 | - |
dc.description.ros | 2017-2018 > Academic research: refereed > Publication in refereed journal | - |
dc.description.validate | 201811_a bcma; 201805 bcrc | en_US |
dc.description.oa | Version of Record | en_US |
dc.identifier.FolderNumber | OA_IR/PIRA | en_US |
dc.description.pubStatus | Published | en_US |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
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Wang_Long-term_O-3-precursor_relationships.pdf | 13.38 MB | Adobe PDF | View/Open |
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