Abstract
Available space and other resources associated with urban greening initiatives are limited, yet demand for urban cooling to mitigate high urban temperatures is growing. Consequently, identifying the best locations for urban greening to maximize the cooling effects of the urban tree canopy (UTC) is taking on new urgency. We present a cross‐city comparison and show how cooling efficiency (CE) varies spatially within a city. CE tends to be higher in locations with less UTC due in part to evapotranspiration from non‐uniformly distributed trees, but results from a subtropical city included within our comparison underscore the strong effect of a city’s background climate on CE. Mapping the spatial variation of CE can guide tree planting to enhance the cooling effects of UTC, expand the role trees play in urban adaptation to local warming, and help achieve urban sustainability.
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