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Using Urban Climate Modelling to Support Climate Change
Adaptation in Small- to Medium-sized Cities in Austria
Stefan GuggenbergerMunicipal Authority of the City of Klagenfurt
on lake WörtherseeDepartment for Climate and Environmental
[email protected]
www.adapt-uhi.org
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Abteilung Klima- und UmweltschutzKlagenfurt
8/7/2019 Stefan Guggenberger, BSc 2
appx. 1500 km
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Abteilung Klima- und UmweltschutzKlagenfurt on lake
Wörthersee
8/7/2019 Stefan Guggenberger, BSc 3
• 100,000 inhabitants
• 160,000 daytime population
• 120 km2
• Capital of Province of Carinthia
• Trade and school center of the region
• Center quite densly populated
• Forests and agricultural land
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Abteilung Klima- und UmweltschutzChallenges due to climate
change• Alpine regions are more affected by climate change than the
global
average
• Changes in the vegetation• Domestic tree species suffer from
heat and drought stress• Water availability during heat waves
• Extreme weather events• Although the annual precipitation
decreases, the intensity of precipitation increases• Hailstorm•
Heat waves and periods of drought
• Demographic challenges• City is growing, average age
increases
8/7/2019 Stefan Guggenberger, BSc 4
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Abteilung Klima- und UmweltschutzUrban Heat IslandsHeat islands
in the city are seen in Klagenfurt as one of the main problems of
the urban climate.The urban climate deviates from the climatic
conditions of the surrounding area, in particular because it has
higher temperatures. These heat islands are defined by the
temperature difference between land and city (Brandenburg et. al
2015: p. 7).
8/7/2019 Stefan Guggenberger, BSc 5
Brandenburg et. al 2015
BASS ET AL 2002: S. 5
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Abteilung Klima- und UmweltschutzADAPT-UHI
8/7/2019 Stefan Guggenberger, BSc 6
Title: Using Urban Climate Modelling to Support Climate Change
Adaptation in Small- to Medium-sized Cities in Austria
Simulation of urban heat islands (UHI) in the cities of
Klagenfurt, Mödling and Salzburg. Simulation of climate change
adaptation measures taking into account the IPCC
scenarios.Assistance of decision-making and planning of adaptation
measures.
ADAPT-UHI
Austrian Climate Research Programme 2017Duration: 2 years
(03/2018 – 03/2020)Total costs: 249.936€
Consortium:IIASA – International Institute for Applied Systems
AnalysisUBA – Environmental agency AustriaZAMG – Central Institute
of Meteorology and GeodynamicsIPAK – International Projekt
Management Agency Klagenfurt
Pilot cities: Klagenfurt, Salzburg, Mödling
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Abteilung Klima- und UmweltschutzMethodology
8/7/2019 Stefan Guggenberger, BSc 7
Status Parameter Input dataset Orography Klagenfurt Land use
classes URBAN ATLAS + LISA Building shape LISA, Klagenfurt Building
hight DKM_GEBAEUDE Wall area index LISA Soil surfaces COPERNICUS:
paved areas, LISA
Tree heightStem heightTree cover
Tree cataster KlagenfurtCOPERNICUS: tree cover densityLISA
Vegetation LISA Vegetation height Klagenfurt
Green roof potential Blue areas LISA, Klagenfurt
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Abteilung Klima- und UmweltschutzMethodology
8/7/2019 Stefan Guggenberger, BSc 8
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Abteilung Klima- und Umweltschutz
8/7/2019 Stefan Guggenberger, BSc 9
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Abteilung Klima- und UmweltschutzValid?
8/7/2019 Stefan Guggenberger, BSc 10
Station1981-2010
Measurement Modell Bias
KGF Airport 54.6 54.2 -1%Tainach -
Niederdorf 51.6 54.5 +5%
Average amount of summer days (>25°C) 1981-2010
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Abteilung Klima- und UmweltschutzFuture Scenarios
8/7/2019 Stefan Guggenberger, BSc 111971-2000
2021-2050
2071-2100
RCP 8.5
RCP 4.5
min.: 1.5 max.: 78.2 mean: 38.1
min.: 5.8 max.: 98.0 mean: 55.7
min.: 9.0 max.: 108.3 mean: 65.6
min.: 5.7 max.: 99.1 mean: 56.0
min.: 24.5 max.: 131.8 mean: 92.5
Mean annual number of summer days (Tmax ≥ 25 °C)
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Abteilung Klima- und UmweltschutzCity Development
8/7/2019 Stefan Guggenberger, BSc 12
• Increasing the albedo affects the microclimate better than
green areas.
• Green areas, however, convince with arguments such as water
retentions and biodiversity.
• Ideal for the future would be a combination of green areas,
bright surfaces and trees.
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Abteilung Klima- und UmweltschutzBenefits of the project
8/7/2019 Stefan Guggenberger, BSc 13
Attention and awareness to climate change and urban heat
islands
Identifying heat islands in Klagenfurt now and in the future
Development of accurate adaptation measures on the basis of the
simulations
Argumentation base in the discussion with stakeholders
Slide 1KlagenfurtKlagenfurt on lake WörtherseeChallenges due to
climate changeUrban Heat
IslandsADAPT-UHIMethodologyMethodologySlide 9Valid?Future
ScenariosCity DevelopmentBenefits of the project