Temporal Changes of NO2 and CO emissions in Central Districts of Istanbul City

This study focused on the temporal changes of pollutant gas concentrations (NO2 and CO) in the air data from different resources, the cornerstone of living life. As a result of the analyzes carried out for a total of seventeen months (January 2020 – May 2021) with consistent data, the increase and decrease trends of two of the polluting gases in the atmosphere were revealed. Geographical studies were carried out with data from one terrestrial station (Üsküdar and Mecidiyeköy) from the Anatolian and European sides of Istanbul, the most populated city in Turkiye. Satellite-based research was also carried out with the Sentinel-5 Precursor (S5p), which the European Space Agency (ESA) created to detect and monitor the concentration of gases in the atmosphere. It has been determined that either terrestrial station-based or S5p satellite data based analyzes can detect and monitor temporal changes in air quality.