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Urban heat island intensity in London: an investigation of the impact of physical characteristics on changes in outdoor air temperature during summer

journal contribution
posted on 04.01.2010 by Maria Kolokotroni, Renganathan Giridharan
The study looks at the potential of physical characteristics in mitigating the urban heat island intensity (UHI) in London during summer. This research uses six on-site variables namely aspect ratio, surface albedo, plan density ratio, green density ratio, fabric density ratio and thermal mass for the investigation in six data sets. The climatic variations in summer are controlled by classifying the data into clear sky, partially cloudy and cloudy periods. Geographical variation is controlled by classifying the data into core, urban and semi urban areas. Maximum daytime UHI of 8.9 C is found in semi-urban area during partially cloudy period while maximum nocturnal UHI of 8.6 C is found in urban area during clear sky period when the wind velocity is below 5 m/s. The most critical climate and geographical location in determining the changes in outdoor air temperature in London are partially cloudy periods and urban areas respectively. Among the variables studied, most critical variable that determines the daytime and nocturnal changes in outdoor air temperature is surface albedo.

History

School

  • Architecture, Building and Civil Engineering

Citation

KOLOKOTRONI, M. and GIRIDHARAN, R., 2008. Urban heat island intensity in London: an investigation of the impact of physical characteristics on changes in outdoor air temperature during summer. Solar Energy, 82 (11), pp. 986-998.

Publisher

© Elsevier

Version

NA (Not Applicable or Unknown)

Publication date

2008

Notes

This article is closed access. It was published in the journal, Solar Energy [© Elsevier] and the definitive version is available at: www.elsevier.com/locate/solener

ISSN

0038-092X

Language

en

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