Cumulative Ozone Dose and its Variation with Height in an Herbaceous Canopy
Finkelstein PL, Meyers TP, Schwede DB, Davison AW, Neufeld HS, Peoples S, Chappelka AH. Cumulative Ozone Dose and its Variation with Height in an Herbaceous Canopy
ABSTRACT: Ozone profiles and sub-canopy turbulence were observed in a stand of cutleaf coneflower during a field study conducted in the Great Smoky Mountains National Park during the Summer of 2003. These observations were used to evaluate a higher-order sub-canopy diffusion and deposition model developed by Meyers and Paw U. The evaluation showed that the turbulence levels predicted by the model, and hence ozone, did not always agree with the observations, but also showed that turbulence levels measured at this forest-edge site were quite different from those expected for a normal well-developed boundary layer. As a proof-of-concept, the model was used to compute cumulative growing season dosage of ozone, on a leaf by leaf basis for the typical coneflower plant. The model predicted that the highest cumulative ozone dose would be in the lower to mid level leaves in the canopy, which is qualitatively consistent with observed patterns of visible injury.
- Type
- Unpublished Report
- Authors
- Finkelstein, Peter; Meyers, Tilden; Schwede, Donna; Davison, Alan; Neufeld, Howard; Peoples, Seth; Chappelka, Arthur
- Units
- ARD , GRSM
- Keywords
- air pollution, air quality, APHN, Appalachian Highlands Network, cut-leaf coneflower, dose, exposure models, Great Smoky Mountains National Park, GRSM, GRSM-00030, ozone, Rudbeckia laciniata, SER, Southeast Region, sub-canopy deposition