Seasonal persistence of the nitrogen oxides production in Mexico City

IF 3 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
S. Matias-Gutierres, E. I. García-Otamendi, H. D. Sánchez-Chávez
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Abstract

This study investigates the seasonal influence on the nitrogen oxide NOx 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 NOx 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 \(\overline{H}=0.72\), indicating relatively smaller fluctuations compared to other seasons, but with the potential for NOx concentrations to surpass those in other periods. In contrast, for spring, summer, and winter, the fluctuations are characterized by exponents of\(\overline{H}=0.59\),\(\overline{H}=0.61\), and\(\overline{H}=0.62\), respectively, demonstrating greater fluctuations with lower NOx concentrations compared to autumn. These results are consistent with various studies conducted worldwide. Additionally, a negative correlation between NOx and ozone (O3) has been established during the winter season, as NOx and O3 fluctuations display persistent and anti-persistent behavior, respectively.

墨西哥城氮氧化物生产的季节性持续性
本研究调查了2010 - 2018年墨西哥城四个监测点氮氧化物NOx污染记录的季节影响。该分析采用二阶结构函数来考察氮氧化物浓度波动的趋势。研究结果表明,波动遵循以赫斯特指数为特征的幂律模式,主要在统计持久性机制中,尺度范围跨越三个数量级。具体而言,秋季的波动指数为\(\overline{H}=0.72\),与其他季节相比波动相对较小,但NOx浓度有超过其他时期的潜力。相比之下,对于春季、夏季和冬季,波动分别以\(\overline{H}=0.59\)、\(\overline{H}=0.61\)和\(\overline{H}=0.62\)的指数为特征,表明与秋季相比,NOx浓度较低时波动较大。这些结果与世界各地进行的各种研究一致。此外,在冬季,NOx和臭氧(O3)之间存在负相关关系,因为NOx和O3的波动分别表现出持续和反持续行为。
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来源期刊
CiteScore
5.60
自引率
6.50%
发文量
806
审稿时长
10.8 months
期刊介绍: International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.
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