top of page

July 2024: Urban Heat vs. Urban Trees

This past month, one of our CCAC Fellows Veronica Ferman presented her findings on a seven month-long study on trees and their impact in mitigating the Urban Heat Island (UHI) Effect. According to the EPA, urban heat islands occur when cities replace natural land cover with dense concentrations of pavement, buildings, and other surfaces that absorb and retain heat. This effect increases energy costs (e.g., for air conditioning), air pollution levels, and heat-related illness and mortality. Ferman's studies found that tree-shaded areas are significantly cooler, averaging 16.23°F lower than unshaded areas, with midday temperatures up to 21.16°F cooler. Asphalt showed the most benefit from shade, while unshaded permeable pavement was cooler than asphalt, suggesting porous materials can help reduce surface heat.


Ferman recommends further research on factors like leaf area index, canopy density, and crown height to better understand these findings. She suggests that Tree San Diego should continue exploring these variables, with precise measurements and data collection during the hottest seasons. Future research can guide site-specific strategies to mitigate the UHI Effect and improve urban thermal comfort within San Diego's unique climate. Most importantly, proper tree maintenance and care are essential for maximizing the cooling benefits provided by healthy trees. Integrating these insights into urban development can create a more resilient and healthier environment for San Diego residents. 


Watch the full webinar HERE and follow along with Ferman's data findings HERE.


댓글 작성이 차단되었습니다.
bottom of page