Urban Heat Island Effect & Risk Groups, Göteborg 2023-08-25
Contemporary urban design is often poorly adapted to the warming effects of climate change, that are now upon us.
Cities both generate heat and are built with materials absorbing heat, by solar radiation. Which reduce vertical air flux, withhold warmer air (and pollutants), closing a loop of unhealthy climate factors. The phenomenon makes the city warmer than the surroundings and is called Urban Heat Island (UHI) effect.
This work include:
• Suggestion how to structure the most commonly involved factors
• Analysis of chosen UHI-factors & vulnerable age groups
• Overlay-analyse of the all factors
All data in this work have been collected, prepared, streamlined/reclassified (with relative values reaching from 1-5) and finally overlayed in a Multi-Criteria Analysis.
Factors
First a pre-study was made, resulting in a suggestional structure holding factors identified that contribute to the UHI effect.
Analysed Factors
Four of these factors was feasible to look into within the time frame of this project, each one presented below in separate works / maps:
Urban density based on building data and direct solar irradiance made on aggregated DEM.
Land cover, based on data from Swedish National Land Cover Database (NMD), and calculated base area means of population, based on data from SCB.
Final Maps
These four works/data sets was then overlaid and weighted to reach the final maps:
Final Map A. Spectrum of adaptation needs in the city.
Final Map B. Base area means of adaptation needs.
