[GabeTheHuman]

Hello everyone! I am confused on how to answer the following question based on given plot below (Figure 1): "Explain the changes observed in the concentration of NO, NO₂, hydrocarbons, aldehydes and oxidants as time goes by. Why do these gases concentrations peak at certain times of the day?" Based on my understanding, the formation of the aforementioned constituent chemical species of photochemical smog are dependent upon one another and thus, the differences in the periods when their concentrations peak (See Figure 2). I would appreciate further knowledge and or corrections concerning the chemical concepts underlying this phenomenon. Thank you.


Figure 1


Figure 2