Urban whole tree carbon storage densities average 7.69 kg C m2 of tree cover and sequestration densities average 0.28 kg C m2 of tree cover per year. Total tree carbon storage in U.S. urban areas (c. 2005) is estimated at 643 million tonnes ($50.5 billion value; 95% CI ¼ 597 million and 690 million tonnes) and annual sequestration is estimated at 25.6 million tonnes ($2.0 billion value; 95% CI ¼ 23.7 million to 27.4 million tonnes).
Greenfield, E.J., Hoehn, R.E., Lapoint, E., and Nowak, D.J. (2013). Carbon Storage and Sequestration by Trees in Urban and Community Areas of the United States. Environmental Pollution, 178, 229-236.View Resource