Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, P.O. Box 80208, Jeddah 21589, Saudi Arabia.
Department of Chemistry, University of Jordan, Amman 11942, Jordan.
Int J Environ Res Public Health. 2019 Jan 17;16(2):258. doi: 10.3390/ijerph16020258.
Ground level ozone (₃) plays an important role in controlling the oxidation budget in the boundary layer and thus affects the environment and causes severe health disorders. Ozone gas, being one of the well-known greenhouse gases, although present in small quantities, contributes to global warming. In this study, we present a predictive model for the steady-state ozone concentrations during daytime (13:00⁻17:00) and nighttime (01:00⁻05:00) at an urban coastal site. The model is based on a modified approach of the null cycle of ₃ and and was evaluated against a one-year data-base of ₃ and nitrogen oxides ( and ₂) measured at an urban coastal site in Jeddah, on the west coast of Saudi Arabia. The model for daytime concentrations was found to be linearly dependent on the concentration ratio of ₂ to whereas that for the nighttime period was suggested to be inversely proportional to ₂ concentrations. Knowing that reactions involved in tropospheric ₃ formation are very complex, this proposed model provides reasonable predictions for the daytime and nighttime concentrations. Since the current description of the model is solely based on the null cycle of ₃ and , other precursors could be considered in future development of this model. This study will serve as basis for future studies that might introduce informing strategies to control ground level ₃ concentrations, as well as its precursors' emissions.
地面臭氧（₃）在控制边界层氧化预算方面发挥着重要作用，从而影响环境并导致严重的健康障碍。臭氧气体是一种众所周知的温室气体，虽然含量很少，但对全球变暖有贡献。在这项研究中，我们提出了一个预测模型，用于预测城市沿海地区白天（13:00-17:00）和夜间（01:00-05:00）的稳态臭氧浓度。该模型基于₃和 的零循环的改进方法，并根据在沙特阿拉伯西海岸吉达的一个城市沿海地区测量的一年的₃和氮氧化物（ 和 ₂）数据进行了评估。发现白天浓度模型与 ₂与 的浓度比呈线性相关，而夜间模型则建议与 ₂浓度成反比。由于参与对流层₃形成的反应非常复杂，因此该提出的模型为白天和夜间浓度提供了合理的预测。由于目前模型的描述仅基于₃和 的零循环，因此可以在未来的模型开发中考虑其他前体物。这项研究将为未来的研究提供基础，这些研究可能会引入控制地面臭氧₃浓度及其前体物排放的信息策略。
