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Influence of urban geometry on outdoor thermal comfort in a hot dry climate: A study in Fez, Morocco

Johansson, Erik LU (2006) In Building and Environment 41(10). p.1326-1338
Abstract
There are few studies on the microclimate and human comfort of urban areas in hot dry climates. This study investigates the influence of urban geometry on outdoor thermal comfort by comparing an extremely deep and a shallow street canyon in Fez, Morocco. Continuous measurements during the hot summer and cool winter seasons show that, by day, the deep canyon was considerably cooler than the shallow one. In summer, the maximum difference was on average 6 K and as great as 10 K during the hottest days. Assessment of thermal comfort using the PET index suggests that, in summer, the deep canyon is fairly comfortable whereas the shallow is extremely uncomfortable. However, during winter, the shallow canyon is the more comfortable as solar access... (More)
There are few studies on the microclimate and human comfort of urban areas in hot dry climates. This study investigates the influence of urban geometry on outdoor thermal comfort by comparing an extremely deep and a shallow street canyon in Fez, Morocco. Continuous measurements during the hot summer and cool winter seasons show that, by day, the deep canyon was considerably cooler than the shallow one. In summer, the maximum difference was on average 6 K and as great as 10 K during the hottest days. Assessment of thermal comfort using the PET index suggests that, in summer, the deep canyon is fairly comfortable whereas the shallow is extremely uncomfortable. However, during winter, the shallow canyon is the more comfortable as solar access is possible. The results indicate that, in hot dry climates a compact urban design with very deep canyons is preferable. However, if there is a cold season as in Fez, the urban design should include some wider streets or open spaces or both to provide solar access. (C) 2005 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
urban design, heat island, urban, urban cool island, microclimate, urban geometry, thermal comfort
in
Building and Environment
volume
41
issue
10
pages
1326 - 1338
publisher
Elsevier
external identifiers
  • wos:000238636500005
  • scopus:33747187218
ISSN
1873-684X
DOI
10.1016/j.buildenv.2005.05.022
language
English
LU publication?
yes
id
7128109b-c13e-445a-a959-e1e770ad1b95 (old id 404618)
date added to LUP
2016-04-01 16:01:54
date last changed
2020-12-29 02:38:59
@article{7128109b-c13e-445a-a959-e1e770ad1b95,
  abstract     = {There are few studies on the microclimate and human comfort of urban areas in hot dry climates. This study investigates the influence of urban geometry on outdoor thermal comfort by comparing an extremely deep and a shallow street canyon in Fez, Morocco. Continuous measurements during the hot summer and cool winter seasons show that, by day, the deep canyon was considerably cooler than the shallow one. In summer, the maximum difference was on average 6 K and as great as 10 K during the hottest days. Assessment of thermal comfort using the PET index suggests that, in summer, the deep canyon is fairly comfortable whereas the shallow is extremely uncomfortable. However, during winter, the shallow canyon is the more comfortable as solar access is possible. The results indicate that, in hot dry climates a compact urban design with very deep canyons is preferable. However, if there is a cold season as in Fez, the urban design should include some wider streets or open spaces or both to provide solar access. (C) 2005 Elsevier Ltd. All rights reserved.},
  author       = {Johansson, Erik},
  issn         = {1873-684X},
  language     = {eng},
  number       = {10},
  pages        = {1326--1338},
  publisher    = {Elsevier},
  series       = {Building and Environment},
  title        = {Influence of urban geometry on outdoor thermal comfort in a hot dry climate: A study in Fez, Morocco},
  url          = {http://dx.doi.org/10.1016/j.buildenv.2005.05.022},
  doi          = {10.1016/j.buildenv.2005.05.022},
  volume       = {41},
  year         = {2006},
}