Uploaded on 2017-03-25

2. Source: https://www.researchgate.net/publication/233768815_Subsurface_urban_heat_islands_in_German_cities ► Superposition of various heat sources leads to a significant regional warming. ► Subsurface urban heat island (UHI) intensities range between 1.9 and 2.4 K As can be seen here, the density of buildings varies quite a bit between city and more rural area. Also buildings size as well as having trees and nature influences the UHI effects. 3. I would focus on size of buildings, their density and the space between them, so building space per km^2. 4. I could not find much about this, as this is not a topic that is very prominent in germany.