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.

中文翻译：

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德黑兰地面臭氧（SOMO35、AOT40f 和 A​​OT40v）的人类、森林和植被健康指标

目的

我们旨在研究空间 O ₃指数（SOMO35：最大每日 8 小时臭氧的年总和超过 35 ppb，AOT40：在白天 8:00 至 20:00 之间的每小时阈值 40 ppb 的累积暴露量植物的生长季节）在德黑兰（2019-2020）。

方法

获得了在德黑兰的 23 个环境空气质量监管监测站 (AQMS) 测量的环境 O _{3浓度数据。}

结果

发现年平均 O ₃浓度为 15.8–25.7 ppb；在 Shahrdari 22 和 Shahr-e-Rey 站分别观测到最高和最低的环境 O ₃年平均浓度。整个德黑兰暴露于 O ₃的空间分布在 1.36-1.64 范围内；最高的 O ₃在德黑兰北部、西部和西南部地区观察到浓度，而德黑兰市中部和南部地区则出现低至中等浓度。德黑兰 AQMS 的 SOMO35、AOT40f 和 A​​OT40v 指数在 1830-6437 ppb 范围内。天，分别为 10,613–39,505 ppb.h 和 4979–16,804 ppb.h。对于德黑兰市，SOMO35 和 AOT40f 的指数为 4138 ppb。天和 27,556 ppb.h。我们的结果显示，德黑兰 AQMS 中 SOMO35 的值高于建议的目标值 3000 ppb。天。

结论

为了减少O ₃污染及其对人类和植物健康的影响，政府组织应采取适当的可持续控制政策。