
Differences in temperature (heat islands) in The Hague on a summer day. Image: NRC
Interesting reseach was done recently at the University of Wageningen, about the occurring of so-called heat islands in cities during the summer. On hot days certain places in the city can become up to 8 degrees hotter than the temperature in the countryside. This is due to the presence of much stone surfaces and little green in the city. Houses and buildings warm up during the day and capture the heat in the streets. During the night the stored heat is then radiated back. The higher the density in the city, the greater this effect becomes. Up to a certain extent at least, because the research also shows that the higher the buildings and the narrower the streets are, the smaller the heat island effect in summer.
Manhattan of the Desert
In the construction of Shibam, an ancient town in Yemen, also known as the “Manhattan of the Desert”, one apparently was already aware of this. The houses here, in fact apartment towers, are built out of clay, up to 11 storeys high. Continue reading →