| A canopy layer model and its application to Rome. | |
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MedLine Citation:
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PMID: 16443256 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An urban canopy layer model based on four energy balance equations at ground level and at building level was developed to simulate and describe the urban climate and the heat storage in an urban setting. Thermal and radiative characteristics of urban and rural surfaces as well as atmospheric parameters related to the general synoptic conditions were used as data input. In addition, buildings were modelled as parallelepipeds and the hysteresis of materials was taken into account. The model provides as output skin temperature of buildings, air temperature and humidity within the canopy layer and hence the mean surface temperature and the air temperature at 2 m above surface. The latter parameter was used for the comparison with in situ temperature observations. The model was applied to Rome in radiative summer and winter episodes. The results, which agree with observations, show that the Urban Heat Island (UHI) is a nocturnal phenomenon, present both in winter (the greatest difference between urban and rural temperatures is about 2 degrees C) and summer (the temperature difference is about 5 degrees C), mainly resulting from the urban geometry and the thermal properties of materials. The anthropogenic heat does not play an important role in the UHI development. A monthly nocturnal behaviour of temperature differences between urban and surrounding rural areas shows that the maximum mean value of 4.2 degrees C occurs in August. Moreover, the parks in the city centre, where temperatures are lower, define two distinct heat islands, east and west. |
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Authors:
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V Bonacquisti; G R Casale; S Palmieri; A M Siani |
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Publication Detail:
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Type: Journal Article Date: 2006-01-26 |
Journal Detail:
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Title: The Science of the total environment Volume: 364 ISSN: 0048-9697 ISO Abbreviation: Sci. Total Environ. Publication Date: 2006 Jul |
Date Detail:
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Created Date: 2006-05-30 Completed Date: 2006-08-01 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0330500 Medline TA: Sci Total Environ Country: Netherlands |
Other Details:
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Languages: eng Pagination: 1-13 Citation Subset: IM |
Affiliation:
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University of Rome "La Sapienza", Department of Physics, Italy. valerio.bonacquisti@uniroma1.it |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Air Pollution
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analysis* Atmosphere / analysis* Climate Environmental Monitoring / methods* Hot Temperature* Models, Theoretical Rome Seasons Urban Population Urbanization* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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