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Implications of climate change for the stomatal flux of ozone: A case study for winter wheat

Harmens, Harry; Mills, Gina; Emberson, Lisa D.; Ashmore, Mike R.. 2007 Implications of climate change for the stomatal flux of ozone: A case study for winter wheat. Environmental Pollution, 146 (3). 763-770. 10.1016/j.envpol.2006.05.018

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Abstract/Summary

Climate change factors such as elevated CO2 concentrations, warming and changes in precipitation affect the stomatal flux of ozone (O3) into leaves directly or indirectly by altering the stomatal conductance, atmospheric O3 concentrations, frequency and extent of pollution episodes and length of the growing season. Results of a case study for winter wheat indicate that in a future climate the exceedance of the flux-based critical level of O3 might be reduced across Europe, even when taking into account an increase in tropospheric background O3 concentration. In contrast, the exceedance of the concentration-based critical level of O3 will increase with the projected increase in tropospheric background O3 concentration. The influence of climate change should be considered when predicting the future effects of O3 on vegetation. There is a clear need for multi-factorial, open-air experiments to provide more realistic information for O3 flux-effect modelling in a future climate.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2006.05.018
Programmes: CEH Programmes pre-2009 publications > Biogeochemistry
CEH Sections: Emmett
ISSN: 0269-7491
Additional Keywords: ozone, climate change, stomatal ozone flux, AOT40, Winter wheat
NORA Subject Terms: Meteorology and Climatology
Agriculture and Soil Science
Date made live: 20 Dec 2007 10:25
URI: http://nora.nerc.ac.uk/id/eprint/1774

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