What is the carbon saving from the cooling effects of urban forests?

Trees for Energy Conservation April 27, 2016 Print Friendly and PDF

Trees and urban forests cool the environment by direct shade, which lowers surface and air temperature, and by evapotranspiration. The lowering of temperatures reduces energy consumption, and thus the amount of carbon emissions at the power plant. In this way, carbon savings are achieved from reduced energy consumption. 

The exact calculation of carbon savings from cooling effects is hard to pinpoint, because savings will vary based on density of tree canopy and spacing in an urban forest. In addition, the maintenance of trees leads to carbon emissions, so it is important to consider the net effects on the carbon balance of a community. In one example, according to the City of Minneapolis, Minnesota Municipal Tree Resource Analysis, street trees in Minneapolis reduce annual CO2 emissions by 27,611 tons through energy savings. The study showed a release of 2,012 tons of CO2 from decomposition and tree care activities annually.

Photo Credit: Raina Sheridan

Citation:

McPherson, Gregory E., James R. Simpson, Paula J. Peper, Scott E. Maco, Shelley L. Gardner, Shuana L. Cozad, and Qingfu Xiao. City of Minneapolis, Minnesota Municipal Tree Resource Analysis. Tech. Center for Urban Forest Research, Pacific Southwest Research Station, USDA Forest Service. June 2005. http://www.fs.fed.us/psw/programs/uesd/uep/products/2/cufr645_MinneapolisMFRA.pdf

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.