Van Tienhoven, AMZunckel, MEmberson, LKoosailee, AOtter, L2007-02-062007-06-072007-02-062007-06-072006-03Van Tienhoven, AM. et al. 2006. Preliminary assessment of risk of ozone impacts to maize (Zea mays) in Southern Africa. Environmental pollution, vol 140(2), pp 220-2300269-7491http://hdl.handle.net/10204/1476http://hdl.handle.net/10204/1476Surface ozone concentrations in southern Africa exceed air quality guidelines set to protect agricultural crops. This paper addresses a knowledge gap by performing a preliminary assessment of potential ozone impacts on vegetation in southern African. Maize (Zea mays L.) is the receptor of interest in the main maize producing countries, i.e. South Africa, Zambia and Zimbabwe. Surface ozone concentrations are estimated for the growing season (October to April) using photochemical modelling. Hourly mean modelled ozone concentrations ranged between 19.7 and 31.2 ppb, while maximums range between 28.9 and 61.9 ppb, and are near 30 ppb over South Africa and Zambia, while in Zimbabwe, they exceed 40 ppb and translate into monthly AOT40 values of over 3000 ppb h in five of the seven months of the growing season. This study suggests that surface ozone may pose a threat to agricultural production in southern African, particularly in Zimbabwe.732685 bytesapplication/pdfenCopyright: 2006 Elsevier Science LtdGround level ozoneMaize crop lossesSouthern AfricaAOT40 exposure indexArticleVan Tienhoven, A., Zunckel, M., Emberson, L., Koosailee, A., & Otter, L. (2006). Preliminary assessment of risk of ozone impacts to maize (Zea mays) in Southern Africa. http://hdl.handle.net/10204/1476Van Tienhoven, AM, M Zunckel, L Emberson, A Koosailee, and L Otter "Preliminary assessment of risk of ozone impacts to maize (Zea mays) in Southern Africa." (2006) http://hdl.handle.net/10204/1476Van Tienhoven A, Zunckel M, Emberson L, Koosailee A, Otter L. Preliminary assessment of risk of ozone impacts to maize (Zea mays) in Southern Africa. 2006; http://hdl.handle.net/10204/1476.TY - Article AU - Van Tienhoven, AM AU - Zunckel, M AU - Emberson, L AU - Koosailee, A AU - Otter, L AB - Surface ozone concentrations in southern Africa exceed air quality guidelines set to protect agricultural crops. This paper addresses a knowledge gap by performing a preliminary assessment of potential ozone impacts on vegetation in southern African. Maize (Zea mays L.) is the receptor of interest in the main maize producing countries, i.e. South Africa, Zambia and Zimbabwe. Surface ozone concentrations are estimated for the growing season (October to April) using photochemical modelling. Hourly mean modelled ozone concentrations ranged between 19.7 and 31.2 ppb, while maximums range between 28.9 and 61.9 ppb, and are near 30 ppb over South Africa and Zambia, while in Zimbabwe, they exceed 40 ppb and translate into monthly AOT40 values of over 3000 ppb h in five of the seven months of the growing season. This study suggests that surface ozone may pose a threat to agricultural production in southern African, particularly in Zimbabwe. DA - 2006-03 DB - ResearchSpace DP - CSIR KW - Ground level ozone KW - Maize crop losses KW - Southern Africa KW - AOT40 exposure index LK - https://researchspace.csir.co.za PY - 2006 SM - 0269-7491 T1 - Preliminary assessment of risk of ozone impacts to maize (Zea mays) in Southern Africa TI - Preliminary assessment of risk of ozone impacts to maize (Zea mays) in Southern Africa UR - http://hdl.handle.net/10204/1476 ER -