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Article: Effects of urban ventilation patterns on the carbon monoxide concentration in a high-rise mega City

TitleEffects of urban ventilation patterns on the carbon monoxide concentration in a high-rise mega City
Authors
KeywordsMega City
Urban Heat Island Circulation
Urban Pollution Monitoring
Urban Ventilation Pattern
Issue Date2011
PublisherVEETECH Ltd. The Journal's web site is located at http://www.ijovent.org/
Citation
International Journal Of Ventilation, 2011, v. 10 n. 3, p. 239-250 How to Cite?
AbstractCarbon monoxide (CO) concentration data from 1999-2006, monitored at 5 different pollution stations in a high-rise mega city (Hong Kong), were collected and investigated. The spatio-temporal characteristics of urban CO concentration profiles were obtained. A new approach was put forward to examine the relationship between urban CO concentration and different wind flow patterns. Rather than relying on the meteorological data from a single weather station, usually adopted in previous studies, four weather stations on the boundary of Hong Kong territory were used in the present study so as to identify 16 different wind flow patterns, among which a typical urban heat island circulation (UHIC) can be distinguished. Higher concentrations were observed to be associated with the flow pattern of an inflow from Lau Fau Shan (LFS) station which is located in the northwest of Hong Kong. This suggests that the ability of dilution for north-to-west wind is relatively weak due to the pollutants carried from outside Hong Kong. The effectiveness of wind speed on the alleviation of urban concentration is dependent on the initial concentration of the approaching wind. The increase of wind speed of north-to-west wind from 0 m/s to 6 m/s has little effect on the reduction of urban CO concentration, especially on the non-roadside stations. By contrast, for the southerly marine wind, pollution concentration decreases sharply with an increase in the wind speed. It was also found that urban heat island circulation (UHIC) is conducive of the accumulation of pollutants, especially at night. There exists a positive correlation between CO concentration and UHI intensity. This correlation is much stronger at night compared to during the day. Copyright © 2011 VEETECH Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/157160
ISSN
2014 Impact Factor: 0.508
2013 SCImago Journal Rankings: 0.225
References

 

DC FieldValueLanguage
dc.contributor.authorLuo, Zen_US
dc.contributor.authorLi, Yen_US
dc.contributor.authorLu, WZen_US
dc.date.accessioned2012-08-08T08:45:36Z-
dc.date.available2012-08-08T08:45:36Z-
dc.date.issued2011en_US
dc.identifier.citationInternational Journal Of Ventilation, 2011, v. 10 n. 3, p. 239-250en_US
dc.identifier.issn1473-3315en_US
dc.identifier.urihttp://hdl.handle.net/10722/157160-
dc.description.abstractCarbon monoxide (CO) concentration data from 1999-2006, monitored at 5 different pollution stations in a high-rise mega city (Hong Kong), were collected and investigated. The spatio-temporal characteristics of urban CO concentration profiles were obtained. A new approach was put forward to examine the relationship between urban CO concentration and different wind flow patterns. Rather than relying on the meteorological data from a single weather station, usually adopted in previous studies, four weather stations on the boundary of Hong Kong territory were used in the present study so as to identify 16 different wind flow patterns, among which a typical urban heat island circulation (UHIC) can be distinguished. Higher concentrations were observed to be associated with the flow pattern of an inflow from Lau Fau Shan (LFS) station which is located in the northwest of Hong Kong. This suggests that the ability of dilution for north-to-west wind is relatively weak due to the pollutants carried from outside Hong Kong. The effectiveness of wind speed on the alleviation of urban concentration is dependent on the initial concentration of the approaching wind. The increase of wind speed of north-to-west wind from 0 m/s to 6 m/s has little effect on the reduction of urban CO concentration, especially on the non-roadside stations. By contrast, for the southerly marine wind, pollution concentration decreases sharply with an increase in the wind speed. It was also found that urban heat island circulation (UHIC) is conducive of the accumulation of pollutants, especially at night. There exists a positive correlation between CO concentration and UHI intensity. This correlation is much stronger at night compared to during the day. Copyright © 2011 VEETECH Ltd.en_US
dc.languageengen_US
dc.publisherVEETECH Ltd. The Journal's web site is located at http://www.ijovent.org/en_US
dc.relation.ispartofInternational Journal of Ventilationen_US
dc.subjectMega Cityen_US
dc.subjectUrban Heat Island Circulationen_US
dc.subjectUrban Pollution Monitoringen_US
dc.subjectUrban Ventilation Patternen_US
dc.titleEffects of urban ventilation patterns on the carbon monoxide concentration in a high-rise mega Cityen_US
dc.typeArticleen_US
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_US
dc.identifier.authorityLi, Y=rp00151en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-82955246289en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-82955246289&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume10en_US
dc.identifier.issue3en_US
dc.identifier.spage239en_US
dc.identifier.epage250en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLuo, Z=35746716000en_US
dc.identifier.scopusauthoridLi, Y=7502094052en_US
dc.identifier.scopusauthoridLu, WZ=7404214360en_US

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