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A scaling law for the Urban Heat Island phenomenon: Deductions from field measurements and comparisons with existing results from laboratory experiments
Högskolan i Gävle.
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2014 (English)In: American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, 2014Conference paper (Refereed)
Abstract [en]

We report results from a multi-scale field experiment conducted in Cyprus in July 2010 in order to investigate the Urban Heat Island (UHI) in Nicosia capital city and its interaction with multiscale meteorological phenomena taking place in the broader region. Specifically, the results are analysed and interpreted in terms of a non-dimensional/scaling parameter dictating the urban heat island circulation reported from laboratory experiments (Fernando et al, 2010). We find that the field measurements obey the same scaling law during the day, in the absence of any other flow phenomena apart from the urban heating. During the night we find that the deduced non-dimensional value reduces to half (compared to that during the day); this is due to the presence of katabatic winds from Troodos mountains into the urban center of Nicosia and their cooling effect superimposed on diurnal urban heating. Based on this deduction, the impact of various proposed heat island mitigation measures in urban planning can be evaluated. Copyright

Place, publisher, year, edition, pages
Keyword [en]
Atmospheric temperature, Computational fluid dynamics, Environmental impact, Environmental technology, Experiments, Flow measurement, Fluid mechanics, Multiphase flow, Rockets, Thermal pollution, Transport properties, Uncertainty analysis, Wind power, Cooling effects, Field experiment, Field measurement, Laboratory experiments, Meteorological phenomena, Mitigation measures, Urban heat island, Urban heat island circulation, Urban transportation
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-167894DOI: 10.1115/FEDSM2014-21819ScopusID: 2-s2.0-84919933783ISBN: 9780791846247OAI: diva2:820861
ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014, Collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels, 3 August 2014 through 7 August 2014

QC 20150612

Available from: 2015-06-12 Created: 2015-05-22 Last updated: 2015-06-12Bibliographically approved

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