Nocturnal cooling in urban areas of Berlin
The local climate of densely built-up areas is best known for its local (urban) heat island (UHI). Especially during cloudless nights with weak winds downtown
areas are significantly warmer than their surrounding suburban and rural areas. Particularly in summer this may display an impairment to the citizens' health.
In order to reduce these impairments urban planning tools usually focus on horizontal exchange processes. Cold, fresh air masses are to conducted along so-called
ventilation paths into warm downtown areas.
- © Institute of Ecology
Postulating that vertical (turbulent) exchange processes also contribute to the cooling of warm downtown areas an experiment was carried out for a basic
validation of this hypothesis. During a 3-week measuring campaign in spring 2007 three automatic weather stations were mounted on the roof of building within the
densely built-up district of Berlin-Charlottenburg to observe and understand nocturnal cooling proccesses with 3-dimensional high frequency wind field and temperature