Urban Heat Islands – Strategy Plan Vienna

Czachs, Christina and Reinwald, Florian and Damyanovic, Doris and Brandenburg, Christiane and Gantner, Birgit and Allex, Brigitte and Preiss, Jürgen and Liebl, Ursula (2013) Urban Heat Islands – Strategy Plan Vienna. PLANNING TIMES – You better Keep Planning or You get in Deep Water, for the Cities they are A-Changin'. Proceedings of 18th International Conference on Urban Planning, Regional Development and Information Society. pp. 1037-1044. ISSN 2521-3938

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“Heat all over Austria” – “Dog days of summer in Vienna” – “Survival tips for the heat wave” – “This week is getting hot” – “Cooling in the city”. These have been the headlines in the Austrian but also European media in the past few years accompanying the summer in Vienna (Allex et al., 2011). Many studies already refer to the increase of heat days (daily maximum temperatures of at least 30° C) and heat periods in cities with dense building and few green spaces (Formayer et al., 2008). Kysely et al. (2000) define heat periods as a minimum of three consecutive days with a maximum temperature of at least 30° C. The period is considered to be continuous if the maximum temperature of each succeeding day is not less than 25° C, and the average maximum temperature during the entire period does not fall below 30° C (Kysely et al., 2000). The increasing of the daily maximum temperatures also leads to an increase of very warm nights (tropical nights).1 This is important, because the minimum night temperature has more impact on the wellbeing of the people as well as the increase in mortality than the daily maximum temperature (StartClim, 2006). As shown in figure 1, in August 2001 the evening temperatures of Vienna were already around 20° C or even higher, especially near and in the city centre. A comparison of the number of hot days in the period 1961-2010 showed an increase for Vienna by an average of 9.6 to 15.2 days. Also for the number of summer days (25° C or more) in Vienna climate models calculated a 30 to 50 percent increase of summer days for the period 2071 to 2100 (ZAMG, 2012) which can result in a rise of the Urban Heat Island phenomenon. Vienna is a dynamic and growing city. Forecasts expect an increase in population to over 2 million by 2030. Urban expansion and re-use of large brownfield sites will be particularly relevant in this respect (MA 18, 2012). Densification of the urban structures without additional measures, however, increases the UHI effect. Urban Heat Islands concern both urban residents and tourists. Persons who have to spend much time in open space as well as health-impaired and elderly people are, however, particularly affected by the impacts. This becomes manifest, for example, in a reduction of activity due to heat (Dune et al., 2013). According to a study by Robine et al., the 2003 heat wave caused around 70,000 deaths across Europe (Robine et al., 2008). In relation to these developments and trends, the city of Vienna has early and strategic decided to elaborate options for mitigating or preventing these effects and to take part in an international research project.

Item Type: Article
Uncontrolled Keywords: Urban Heat Islands Climate Change Urban Ecology Urban Planning
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography
G Geography. Anthropology. Recreation > GE Environmental Sciences
Depositing User: The CORP Team
Date Deposited: 02 May 2019 14:44
Last Modified: 02 May 2019 14:44
URI: http://repository.corp.at/id/eprint/655

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