Cold air influence zone (2022)
View on the mapUrban areas that benefit at night from cold air produced by forests, meadows and parks. Important for night-time cooling in summer and urban climate resilience. Source: Berlin Climate Analysis 2022.
Kieze compared
Area cooled at night by cold air from the surrounding countryside. The values appear side by side without judgement.
Highest values
Source
- Provider
- gdi.berlin.de
- Licence
- dl-de/zero
- Data as of
- June 2024
- Objects
- 11,157
Calculation
Urban areas that benefit at night from cold air from forests, meadows and parks. Source: Berlin Climate Analysis 2022.
- Aggregation
- City block
- Maintenance
- Senate Department for Urban Mobility, Transport, Climate Action and the Environment, Berlin Environmental Atlas (Umweltatlas)
- Update frequency
- irregularly
Related layers
Frequently asked questions
PET is a bioclimatic indicator. It states which air temperature in an enclosed room would correspond to the perceived temperature outdoors. Wind, humidity and radiation feed into it. The value is suited to comparing heat stress across urban areas.
The German Weather Service (Deutscher Wetterdienst) counts a day with a maximum temperature of 30 degrees Celsius or more as a hot day. The number of hot days per year in Berlin has risen markedly since the 1990s, as documented in the 1991-2020 climate normal period.
A climate normal period is a 30-year reference period that the World Meteorological Organization uses to make weather averages comparable. For Berlin, we use the current period 1991-2020 as the basis for comparison.
Asphalt and stone store heat and release it again at night. Heavily sealed neighbourhoods cool down less well than neighbourhoods with vegetation or open water. The urban climate analysis treats sealing as one factor among several.