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Lookup NU author(s): Emeritus Professor Alan Davison, Professor Howard Neufeld
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Although there has been a great deal of research on ozone, interest in exposure of native, herbaceous species is relatively recent and it is still not clear what role the pollutant has in their ecological fitness. The ozone exposure of a plant is usually expressed in terms of the concentration above the canopy or as a time-weighted index. However, to understand the physiological effects of ozone it is necessary to quantify the ozone flux to individual leaves as they develop, which requires knowing the deposition velocity and concentration of the pollutant as a function of height throughout the plant canopy. We used a high-order closure model of sub-canopy turbulence to estimate ozone profiles in stands of cutleaf coneflower (Rudbeckia laciniata L.) located in the Great Smoky Mountains National Park, USA. The model was run for periods coinciding with a short field study, during which we measured vertical concentration profiles of ozone along with measurements of atmospheric turbulence and other meteorological and plant variables. Predictions of ozone profiles by the model are compared with observations throughout the canopy. © 2004 Elsevier Ltd. All rights reserved.
Author(s): Finkelstein PL, Davison AW, Neufeld HS, Meyers TP, Chappelka AH
Publication type: Article
Publication status: Published
Journal: Environmental Pollution
Year: 2004
Volume: 131
Issue: 2
Pages: 295-303
ISSN (print): 0269-7491
ISSN (electronic): 1873-6424
Publisher: Pergamon
URL: http://dx.doi.org/10.1016/j.envpol.2004.02.029
DOI: 10.1016/j.envpol.2004.02.029
PubMed id: 15234096
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