TY - JOUR T1 - Air Pollutant Uptake by Sacramento’s Urban Forest JF - Arboriculture & Urban Forestry (AUF) JO - JOA SP - 224 LP - 234 DO - 10.48044/jauf.1998.027 VL - 24 IS - 4 AU - Klaus I. Scott AU - E. Gregory McPherson AU - James R. Simpson Y1 - 1998/07/01 UR - http://auf.isa-arbor.com/content/24/4/224.abstract N2 - A dry deposition model was employed to estimate air pollutant uptake by Sacramento’s urban forest. Assuming 1990 air pollutant concentrations, model simulations estimated that approximately 1,457 metric tons of air pollutant are absorbed annually, at an implied value of US$28.7 million. The growing season daily uptake for ozone was approximately 2.4 metric tons per day, while particulate matter (< 10 μ diameter, PM10) uptake was slightly greater, at 2.7 metric tons per day. Daily uptake of NO2 and particulate matter represented 1 % to 2% of anthropogenic emissions for the county. Estimated growing-season annual air pollutant uptake rates averaged 10.9 kg/(ha land area per yr) for the entire study area, 13.9 kg/(ha land area per yr) for urban areas and 4.2 kg/(ha land area per yr) for rural areas. Pollutant uptake rates decreased with decreasing tree canopy cover, along an urban-to-rural gradient. ER -