Year: 2024
Type: article
Abstract: This study investigates the seasonal influence on the nitrogen oxide NO x pollution records at four monitoring sites in Mexico City from 2010 to 2018. The analysis employs the second-order structure function to examine the trends in NO x concentration fluctuations. The findings reveal that the fluctuations follow a power law pattern characterized by Hurst exponents, predominantly in the statistical persistence regime, with a scaling range spanning three orders of magnitude. Specifically, the autumn period exhibits fluctuations with an exponent of $$\overline{H}=0.72$$ H ¯ = 0.72 , indicating relatively smaller fluctuations compared to other seasons, but with the potential for NO x concentrations to surpass those in other periods. In contrast, for spring, summer, and winter, the fluctuations are characterized by exponents of $$\overline{H}=0.59$$ H ¯ = 0.59 , $$\overline{H}=0.61$$ H ¯ = 0.61 , and $$\overline{H}=0.62$$ H ¯ = 0.62 , respectively, demonstrating greater fluctuations with lower NO x concentrations compared to autumn. These results are consistent with various studies conducted worldwide. Additionally, a negative correlation between NO x and ozone (O 3 ) has been established during the winter season, as NO x and O 3 fluctuations display persistent and anti-persistent behavior, respectively.
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,390
OpenAlex ID: W4404181998