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Article: Impacts of environmental factors on urban heating

TitleImpacts of environmental factors on urban heating
Authors
KeywordsCloud cover
Urban cool island
Urban heat island
Wind speed
Issue Date2010
PublisherI O S Press. The Journal's web site is located at http://www.iospress.nl/html/10010742.php
Citation
Journal Of Environmental Sciences, 2010, v. 22 n. 12, p. 1903-1909 How to Cite?
AbstractThis study investigated the impact of important environmental variables (i.e., wind speed, solar radiation and cloud cover) on urban heating. Meteorological parameters for fifteen years (from 1990 to 2005), collected at a well developed and densely populated commercial area (Tsim Sha Tsui, Hong Kong), were analyzed in details. Urban heat island intensity (UHII), a well known indicator of urban heating, has been determined as the spatially averaged air-temperature difference between Tsim Sha Tsui and Ta Kwu Ling (a thinly populated rural area with lush vegetation). Results showed that the UHII and cloud cover have increased by around 9.3% and 4%, respectively, whereas the wind speed and solar radiation have decreased by around 24% and 8.5%, respectively. The month of December experienced the highest UHII (10.2°C) but the lowest wind speed (2.6 m/sec) and cloud cover (3.8 oktas). Conversely, the month of April observed the highest increases in the UHII (over 100%) and the highest decreases in wind speed (over 40 %) over fifteen years. Notably, the increases in the UHII and reductions in the wind speed were the highest during the night-time and early morning. Conversely, the intensity of solar radiation reduced while the intensity of urban cool island (UCII) increased during solar noon-time. Results demonstrated strong negative correlation between the UHII and wind speed (coefficient of determination, R2 = 0.8) but no negative correlation between UCII and solar radiation attenuation. A possible negative correlation between UHII and cloud cover was investigated but could not be substantiated. © 2010 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
Persistent Identifierhttp://hdl.handle.net/10722/134421
ISSN
2015 Impact Factor: 2.208
2015 SCImago Journal Rankings: 0.832
ISI Accession Number ID
Funding AgencyGrant Number
University Research Committee, University of Hong Kong
Funding Information:

The authors are grateful to the University Research Committee, University of Hong Kong, for providing necessary funding for this work The first author is also thankful to Prof Muhammad Atif and Mr Seed Memon, who provided necessary facilities and help for carrying out this work in CAD-CAM lab, Department of Mechanical Engineering, Mehran University of Engineering & Technology, Jamshoro, Pakistan

References

 

DC FieldValueLanguage
dc.contributor.authorMemon, RAen_HK
dc.contributor.authorLeung, DYCen_HK
dc.date.accessioned2011-06-17T09:20:14Z-
dc.date.available2011-06-17T09:20:14Z-
dc.date.issued2010en_HK
dc.identifier.citationJournal Of Environmental Sciences, 2010, v. 22 n. 12, p. 1903-1909en_HK
dc.identifier.issn1001-0742en_HK
dc.identifier.urihttp://hdl.handle.net/10722/134421-
dc.description.abstractThis study investigated the impact of important environmental variables (i.e., wind speed, solar radiation and cloud cover) on urban heating. Meteorological parameters for fifteen years (from 1990 to 2005), collected at a well developed and densely populated commercial area (Tsim Sha Tsui, Hong Kong), were analyzed in details. Urban heat island intensity (UHII), a well known indicator of urban heating, has been determined as the spatially averaged air-temperature difference between Tsim Sha Tsui and Ta Kwu Ling (a thinly populated rural area with lush vegetation). Results showed that the UHII and cloud cover have increased by around 9.3% and 4%, respectively, whereas the wind speed and solar radiation have decreased by around 24% and 8.5%, respectively. The month of December experienced the highest UHII (10.2°C) but the lowest wind speed (2.6 m/sec) and cloud cover (3.8 oktas). Conversely, the month of April observed the highest increases in the UHII (over 100%) and the highest decreases in wind speed (over 40 %) over fifteen years. Notably, the increases in the UHII and reductions in the wind speed were the highest during the night-time and early morning. Conversely, the intensity of solar radiation reduced while the intensity of urban cool island (UCII) increased during solar noon-time. Results demonstrated strong negative correlation between the UHII and wind speed (coefficient of determination, R2 = 0.8) but no negative correlation between UCII and solar radiation attenuation. A possible negative correlation between UHII and cloud cover was investigated but could not be substantiated. © 2010 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.en_HK
dc.languageengen_US
dc.publisherI O S Press. The Journal's web site is located at http://www.iospress.nl/html/10010742.phpen_HK
dc.relation.ispartofJournal of Environmental Sciencesen_HK
dc.subjectCloud coveren_HK
dc.subjectUrban cool islanden_HK
dc.subjectUrban heat islanden_HK
dc.subjectWind speeden_HK
dc.subject.meshCities - statistics and numerical data-
dc.subject.meshHong Kong-
dc.subject.meshHot Temperature-
dc.subject.meshRegression Analysis-
dc.subject.meshSeasons-
dc.titleImpacts of environmental factors on urban heatingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1001-0742&volume=22&issue=12&spage=1903&epage=1909&date=2010&atitle=Impacts+of+environmental+factors+on+urban+heating-
dc.identifier.emailLeung, DYC:ycleung@hku.hken_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S1001-0742(09)60337-5en_HK
dc.identifier.pmid21462708-
dc.identifier.scopuseid_2-s2.0-78649935287en_HK
dc.identifier.hkuros185830en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78649935287&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume22en_HK
dc.identifier.issue12en_HK
dc.identifier.spage1903en_HK
dc.identifier.epage1909en_HK
dc.identifier.isiWOS:000285819400011-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridMemon, RA=26656757300en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.citeulike10504528-

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