Institute of Ecosystem Studies

2009 BES Annual Meeting Presentation and Poster Abstracts

Permanent Plot Results (Baltimore and Baltimore County) and Spatial Modeling
Nowak, David
Co-Authors: Gordon Heisler, Alexis Ellis, Satoshi Hirabayshi, Bob Hoehn, Ian Yesilonis, Dan Crane, Rich Pouyat

Abstract: Permanent field plots have been established in Baltimore City (200 plots) and throughout the Urban Rural Demarcation Line (URDL; 130,700 acres) in Baltimore County (197 plots). The plots in the city have been measured in 1999, 2004, and 2009. The plots in the URDL were measured in 2007. In the URDL, there are an estimated 6.8 million trees, with the most common species being red maple (9.1%), tulip tree (5.7%) and black cherry (5.2%). These trees are estimated to remove 1,450 tons/year ($10.6 million/year) of air pollution annually and store approximately 1,311,000 tons of carbon ($27.1 million). Additional forest benefits are also estimated and will be presented. In the City of Baltimore, the 2009 data are currently being analyzed and study results on urban forest structure and benefits will be presented. In addition to the field data being analyzed in the Baltimore area, various new spatial tools are being developed for i-Tree ( that use tree cover, field data and other variables from the Baltimore area. These tools estimate the spatial variations in air pollutant concentrations and air temperatures. The goals of this tool development and analyses are to target the most appropriate areas to enhance canopy cover to reduce air temperatures and air pollution, and to determine the best areas for canopy cover in terms of protecting human populations relative to exposure to air pollutants and thermal stress. The development of these new tools will be discussed.