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Article: Effects of urban ventilation patterns on the carbon monoxide concentration in a high-rise mega City
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TitleEffects of urban ventilation patterns on the carbon monoxide concentration in a high-rise mega City
 
AuthorsLuo, Z1
Li, Y1
Lu, WZ2
 
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/
 
CitationInternational 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.
 
ISSN1473-3315
2013 Impact Factor: 0.303
2013 SCImago Journal Rankings: 0.225
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorLuo, Z
 
dc.contributor.authorLi, Y
 
dc.contributor.authorLu, WZ
 
dc.date.accessioned2012-08-08T08:45:36Z
 
dc.date.available2012-08-08T08:45:36Z
 
dc.date.issued2011
 
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.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationInternational Journal Of Ventilation, 2011, v. 10 n. 3, p. 239-250 [How to Cite?]
 
dc.identifier.epage250
 
dc.identifier.issn1473-3315
2013 Impact Factor: 0.303
2013 SCImago Journal Rankings: 0.225
 
dc.identifier.issue3
 
dc.identifier.scopuseid_2-s2.0-82955246289
 
dc.identifier.spage239
 
dc.identifier.urihttp://hdl.handle.net/10722/157160
 
dc.identifier.volume10
 
dc.languageeng
 
dc.publisherVEETECH Ltd. The Journal's web site is located at http://www.ijovent.org/
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofInternational Journal of Ventilation
 
dc.relation.referencesReferences in Scopus
 
dc.subjectMega City
 
dc.subjectUrban Heat Island Circulation
 
dc.subjectUrban Pollution Monitoring
 
dc.subjectUrban Ventilation Pattern
 
dc.titleEffects of urban ventilation patterns on the carbon monoxide concentration in a high-rise mega City
 
dc.typeArticle
 
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<contributor.author>Li, Y</contributor.author>
<contributor.author>Lu, WZ</contributor.author>
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Author Affiliations
  1. The University of Hong Kong
  2. City University of Hong Kong