in D, 1992. Paper abstract bibtex
Laboratory and field studies were conducted to determine the deposition of NO2 and HNO3 to woody plants. Depostion of NO2 to foliage was linearly related to stomatal conductance across a range of hardwood and conifer species, emphasizing the importance of internal deposition. Deposition rates were as high as 5 nmol/m2/s. In contrast, HNO3 exibited substantial depostition to external leaf surfaces, although some internal depostion also occurred. Internal deposition rates changed from 5 to 53 nmol/g/s. Extrapolating deposition rates to forest stands resulted in estimates of NO2 depostion ranging from 11 to 200 mol/ha/yr and HNO3 deposition from 25 to 213 mol/ha/yr. The wide variation in deposition values was related to differences in leaf area index and ambient NO2 and HNO3 concentrations.