top of page
background_edited.jpg
Search

July 2024: Urban Heat vs. Urban Trees

Writer's picture: Tree San DiegoTree San Diego

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.

Tree san diego icon.png

Tree San Diego is a nonprofit dedicated to enhancing the quality, density, and sustainability of the region’s urban forests for the benefit of all communities and the environment.

​

We respectfully acknowledge the traditional custodians of the lands on which we live and work and pay our respects to their elders past, present and emerging. Learn more here.

STAY CONNECTED

  • Facebook
  • Instagram
  • LinkedIn
  • Youtube
Screenshot 2025-01-05 at 3.18.30 PM.png
Chairty Navigator.png

SUPPORT

CONTACT US

PO BOX 6324, San Diego, CA 92166

858-210-6451

info@treesandiego.org

EIN 46-5183143

Tree San Diego 2025 ©

Created with Wix

Privacy Policy

bottom of page