Abstract
Purpose
We aimed to investigate the spatial O3 indices (SOMO35: annual sum of maximum daily 8-h ozone means over 35 ppb, AOT40: the accumulated exposure over an hourly threshold of 40 ppb during daylight hours between 8:00 and 20:00 in the growing seasons of plants) in Tehran (2019–2020).
Methods
The data of ambient O3 concentrations, measured at twenty-three regulatory ambient air quality monitoring stations (AQMSs) in Tehran, were obtained.
Results
The annual mean O3 concentrations were found to be 15.8–25.7 ppb; the highest and lowest annual mean concentration of ambient O3 were observed in Shahrdari 22 and Shahr-e-Rey stations, respectively. Spatial distribution of exposure to O3 across Tehran was in the range of 1.36–1.64; the highest O3 concentrations were observed in the northern, west and south-western parts of Tehran, while the central and south areas of Tehran city experienced low to moderate concentrations. The indices of SOMO35, AOT40f and AOT40v across AQMSs in Tehran was in the range of 1830–6437 ppb. Days, 10,613–39,505 ppb.h and 4979–16,804 ppb.h, respectively. For Tehran city, the indices of SOMO35 and AOT40f were 4138 ppb. days and 27,556 ppb.h respectively. Our results revealed that the value of SOMO35 across AQMSs of Tehran was higher than the recommended target value of 3000 ppb. days.
Conclusions
To reduce O3 pollution and its effects on both human and plants health, the governmental organizations should take appropriate sustainable control policies.
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Data availability
All data generated or analysed during this study are included in this published article.
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Acknowledgements
The authors are grateful to Tehran Air Quality Control Company for providing ambient air pollutant concentrations data.
Funding
The present study was funded by grant number 97000507 from Health Research Center, Lifestyle Institute, Baqiyatallah University of Medical Sciences.
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SF and AA deigned the study. SF and HF conducted the study and gathered all data. SF and HA analyzed the data. SF drafted the manuscript. AA, HF, SK and HA revised the manuscript.
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Faridi, S., Akbari, H., Faridi, H. et al. Human, Forest and vegetation health metrics of ground-level ozone (SOMO35, AOT40f and AOT40v) in Tehran. J Environ Health Sci Engineer 18, 1351–1358 (2020). https://doi.org/10.1007/s40201-020-00552-2
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DOI: https://doi.org/10.1007/s40201-020-00552-2