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Sub-canopy deposition of ozone in a stand of cutleaf coneflower

Lookup NU author(s): Emeritus Professor Alan Davison, Professor Howard Neufeld

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Abstract

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.


Publication metadata

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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