Which cooling capacity is higher? Trees or grass?
Trees
By what is cooling effect strongly affected?
Water availability (less water -> less transpiration -> smaller evaporative cooling (that is why trees in southern europe cool less effectively)
Extent of cooling of a park
roughly equal to the park width
depends on shape, air-flow, length of perimeter, …
several small parks have larger cooling effect than one big park
Whar are important factors for the shading and cooling effect?
species
spatial distribution
amount of trees
How much can the indoor temperature be lowered by green facades (Berlin modeling study)? (Felgentree et al. 2022)
~3°C
Where is a lack of study (Moss et al. 2019)
evaporation rates in urban areas
What has the tree canopy structure characteristics a significant influence on? (Yan et al. 2012)
on the microclimate
-> the denser the tree canopy, the lower the air temperature and the better the thermal comfort
depending on geographical location urban green may enhance cooling, water retention, both or neither - who decides this?
unwanted effects of trees
Last changeda year ago