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Potential of Urban Densification to Mitigate the Effects of Heat Island in Vienna, Austria

AIT Austrian Institute of Technology GmbH, Giefinggasse 4, 1210 Vienna, Austria
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Environments 2019, 6(7), 82; https://doi.org/10.3390/environments6070082
Received: 31 May 2019 / Revised: 29 June 2019 / Accepted: 9 July 2019 / Published: 10 July 2019
(This article belongs to the Special Issue Adaptation Measures for Urban Heat Island)
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Abstract

Global increase of urban population has brought about a growing demand for more dwelling space, resulting in various negative impacts, such as accelerated urbanization, urban sprawl and higher carbon footprints. To cope with these growth dynamics, city authorities are urged to consider alternative planning strategies aiming at mitigating the negative implications of urbanization. In this context, the present contribution investigates the potential of urban densification to mitigate the heat island effects and to improve outdoor thermal conditions. Focusing on a quite densely urbanized district in Vienna, Austria, we carried out a set of simulations of urban microclimate for pre- and post-densification scenarios using the parametric modelling environment Rhinoceros 3D and a set of built-in algorithms in the Rhino’s plug-in Grasshopper. The study was conducted for a hot summer period. The results revealed a notable solar shielding effect of newly introduced vertical extensions of existing buildings, promoting temperature decrease and improved thermal conditions within more shaded urban canyons and courtyards. However, a slight warming effect was noted during the night-time due to the higher thermal storage and lower sky view factor. View Full-Text
Keywords: urban heat island; urban densification; solar radiations shielding; climate adaptation measures urban heat island; urban densification; solar radiations shielding; climate adaptation measures
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Vuckovic, M.; Loibl, W.; Tötzer, T.; Stollnberger, R. Potential of Urban Densification to Mitigate the Effects of Heat Island in Vienna, Austria. Environments 2019, 6, 82.

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