Investigation of tropospheric NO2 changing procedure in Kermanshah city using the OMI sensor and its relationship with meteorological parameters

Nitrogen dioxide is not only a potential air pollutant in urban and industrial area but it is a photochemical smog precursor and pollutant ozone. Urban area has high tropospheric concentrations and close to the earth surface. Nitrogen dioxide has a great impact on human health and its increase in the air causes many diseases. Therefore, monitoring the amount of nitrogen dioxide and its changes is one of the important issues in metropolitan management. Considering the importance of nitrogen dioxide in air pollution, tropospheric nitrogen dioxide concentration with meteorological parameters the trend of changing the tropospheric nitrogen dioxide using OMI sensor in the period 2006 to 2019 has been investigated in this research. OMI sensor images placed on the Aura satellite are used to study nitrogen dioxide in the troposphere layer. The results showed that the highest amount of nitrogen dioxide occurred in the cold months of the year and the lowest amount occurred in the warm months of the year. Meteorological conditions can increase the severity of tropospheric nitrogen dioxide pollution and spread it further. The results of tropospheric nitrogen dioxide concentration with meteorological parameters showed that the correlation coefficient of Pearson nitrogen dioxide is inversely related to wind speed, horizontal visibility and surface temperature respectively. Also, Pearson correlation of nitrogen dioxide is directly related to relative humidity.