The difference between tree cover and useful shade
A canopy map sees crowns from above. Pedestrians meet moving shadows on particular pavements and at particular hours. Both views matter when a city plans for heat.
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Shade changes more than the thermometer reading
Tree shade can sharply reduce the sunlight and surface heat a walker receives even when nearby air temperature barely shifts. Field studies show why the pedestrian's route, its surfaces and its hour matter to measuring relief.