It turns out that even a single tree lowers the ambient temperature
Studies have shown that trees that are planted apart, such as roadside trees, or even a single tree, have the effect of lowering the ambient temperature.
Spatial configuration and time of day impacts the magnitude of urban tree canopy cooling --IOPscience
When a single tree makes a difference | EurekAlert! Science News
Michael Alonzo and colleagues at American University measured temperatures multiple times in different parts of Washington, DC on hot summer days. We measured temperatures more than 70,000 times on paved roads, unpaved roads, parks and home gardens.
Analysis of the data revealed that if half of the area of an area is shaded by canopy , the temperature around the trees will be up to 1.4 degrees lower in the evening than in areas with few trees. Alonzo et al. 'The shade of a single tree 15 meters high can be as much as 56 meters in the evening, which means that even a small tree can shade a large area in the evening. I will do it. '
Furthermore, it is known that the cooling effect produced by the shade of trees lasts from evening to before dawn. In the area where the canopy occupies 20% of the area, the temperature was lower than in the area without trees even before dawn.
According to climate studies, average urban temperatures are on the rise compared to the past. Alonzo et al. 'Don't underestimate the role individual trees play in mitigating urban warming, according to our research.' 'Urban planners are many small in urban areas. You can plant one tree at a time in the space. '
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