Modelling crop yield ozone

The study finds that accelerated leaf senescence is the primary mechanism by which ozone pollution reduces crop yield, rather than direct impairment of photosynthesis in un-senesced leaves. It concludes that the Phytotoxic Ozone Dose (POD), based on stomatal O3 flux, is a more accurate predictor of physiological response than 24-hour mean concentrations or AOT40.

• Accelerated leaf senescence is identified as the primary driver of ozone-induced yield loss in most agricultural settings, as negative effects on photosynthesis were only observed in conjunction with O3-induced senescence.
• The Phytotoxic Ozone Dose (POD), which simulates stomatal O3 flux using a multiplicative stomatal conductance model, outperformed both 24-hour mean concentrations and AOT40 (accumulated O3 exceeding 40 ppb during daylight hours) in predicting physiological responses.
• Experimental results from 2015 and 2016 involving two wheat cultivars showed that leaf senescence occurred earlier as average POD increased, though the two cultivars exhibited significantly different responses to this senescence.

APA

Stockholm Environment Institute (2019). Modelling crop yield ozone. https://www.sei.org/publications/modelling-crop-yield-ozone/

Chicago

Stockholm Environment Institute. Modelling crop yield ozone. 2019. https://www.sei.org/publications/modelling-crop-yield-ozone/.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Modelling crop yield ozone |date=1 April 2019 |url=https://www.sei.org/publications/modelling-crop-yield-ozone/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitute2019modelling, author = {{Stockholm Environment Institute}}, title = {{Modelling crop yield ozone}}, institution = {Stockholm Environment Institute}, year = {2019}, month = apr, url = {https://www.sei.org/publications/modelling-crop-yield-ozone/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }