Abstract
Abstract. The positive effect of urban greenery on the city’s microclimate is well known, as is its ability to reduce the ambient temperature in urban areas. Our results show how the areas with the lowest surface temperature clearly coincide with the vegetated areas in the city of Barcelona. This phenomenon demonstrates the importance of increasing the urban greenery in large compact cities, such as the city of Barcelona, in order to regulate the local temperature and mitigate the effects of global warming on a large scale. The web map presented here can be used as a tool for decision makers to identify the warmest areas in the city of Barcelona and to increase greenery in an efficient manner.
Highlights
The ambient temperature of urban areas is usually higher than the temperature of the surrounding landscape
The positive effect of urban greenery on the city’s microclimate is well known, as is its ability to reduce the ambient temperature in urban areas
Our results show how the areas with the lowest surface temperature clearly coincide with the vegetated areas in the city of Barcelona
Summary
The ambient temperature of urban areas is usually higher than the temperature of the surrounding landscape. This phenomenon is known as the Urban Heat Island (UHI) (Manley, 1958; Oke, 1973). Urban areas with vegetation have a significantly lower surface temperature than built-up areas (Akbari et al, 1998; Masson, 2006). The objective of this research is to visually demonstrate how the land surface temperature is influenced by vegetation in the municipality of Barcelona. The visualization presented here enables urban planners to identify the most vulnerable areas of the city with regard to a global issue: the climate emergency. The data collected for the analysis, as well as the data gathered to develop the web map, is all open data available from Open Data BCN and the United States Geological Survey (USGS) websites
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