Numerical Analysis of surface Ozone and its relation to synoptic patterns in Tehran

Subject Areas : Climatology

Ali Afshariazad ¹ , Bahman Ramezani ² , atoosa bigdeli ³ , mohammadreza afshariazad ⁴

1 - PhD student in Climatology, Rasht Branch, Islamic Azad University, Rasht, Iran
2 - Professor, Department of Geography, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran
3 - Assistant Professor, Department of Geography, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran
4 - Assistant Professor, Department of Geography, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran

Received: 2022-11-24 Accepted : 2023-01-24 Published : 2023-02-20

Keywords: numerical analysis, Tehran, synoptic patterns, surface ozone emissions,

Abstract :

This research tries to assess the emission and concentration of surface Ozone related to the synoptic weather patterns in general circulation of atmosphere. 2020 – 2021 is the time and Tehran is the place of this research. Based on the defined scenarios, the extreme emission day, the pure day accompanied with stability and instability of the atmosphere, air pressure in sea level and 500 hpa. Skew-T chart from Mehrabad airport were analyzed. The emission datum was taken from the six stations of the air quality control organization in Tehran. The analysis was done daily and seasonally. The result of the research shows that in 24 hours emissions the most concentration happens in the mid-day and last until 6 in the evening. Among the seasons, summer has the most concentration because of the dominance of high pressure in atmosphere, increase in surface temperature high radiation and wind speed. More than 6 m

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