Volume 11, 2014
|Page(s)||72 - 78|
|Published online||09 October 2015|
Vegetation in the urban area of tunis: a study of impacts on temperature and light*
Université de Sfax, unité de recherche GREVACHOT, Sfax – Tunisie
2 Université de Carthage, équipe de Recherche sur les Ambiances, Carthage – Tunisie
3 Université de Sfax, Laboratoire SYFACTE, Sfax – Tunisie
LANDSAT and ASTER images enabled us to detect increased surface coolness corresponding to urban parks that heat up less than the artificial substrate. Maximum temperature differences reached 7°C diurnally and over 10°C at night. Field measurements showed that these green spaces lower air temperatures by 1 to 2°C during the day and by about 3°C at night. The study showed that the intensity of the urban park effect in Tunis depends on the size of the vegetated area, the volume of plant biomass and irrigation. Vegetation enables streets to cool by 1 to 2°C during daytime sunshine hours in summer. Light measurement showed special lighting effects in vegetated streets that diminish bright light and provide a comfortable visual perception.
Key words: green space / temperature / cool island / light / Tunis
© Association internationale de climatologie 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License CC-BY-NC (http://creativecommons.org/licenses/by-nc/4.0), which permits unrestricted use, distribution, and reproduction in any medium, except for commercial purposes, provided the original work is properly cited.
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