<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-6236</journal-id>
<journal-title><![CDATA[Atmósfera]]></journal-title>
<abbrev-journal-title><![CDATA[Atmósfera]]></abbrev-journal-title>
<issn>0187-6236</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-62362025000100030</article-id>
<article-id pub-id-type="doi">10.20937/atm.53482</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Evaluation of air quality in Puebla, Mexico: A wavelet transform and predictive modeling approach]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Cadena]]></surname>
<given-names><![CDATA[Juan Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Cerritos]]></surname>
<given-names><![CDATA[Juan Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marin-Lopez]]></surname>
<given-names><![CDATA[Abigail]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado-Fernández]]></surname>
<given-names><![CDATA[Joaquín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentecilla-Cárcamo]]></surname>
<given-names><![CDATA[Ivan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Varela-Carlos]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana-Iztapalapa Departamento de Matemáticas ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Ingeniería de Procesos e Hidráulica ]]></institution>
<addr-line><![CDATA[Iztapalapa Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Facultad de Ciencias Físico-Matemáticas ]]></institution>
<addr-line><![CDATA[Heroica Puebla de Zaragoza Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>39</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-62362025000100030&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-62362025000100030&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-62362025000100030&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This article presents a detailed analysis of air pollutant dynamics in Puebla City, Mexico, using data collected between 2016 and 2024. The research examines the daily variation of five main pollutants: ozone (O3), particulate matter smaller than 10 microns (PM10), particulate matter smaller than 2.5 microns (PM2.5), sulfur dioxide (SO2), and nitrogen dioxide (NO2). To identify significant trends and seasonal patterns, the Mann-Kendall test, innovative trend analysis (ITA), and wavelet transform were applied. The results indicate statistically significant upward trends in O3, SO2, and NO2 concentrations, while PM10 and PM2.5 levels have exhibited a sustained decrease throughout the study period. The scalogram analysis highlights seasonal energy concentrations of SO2, potentially linked to industrial activity and meteorological conditions. Additionally, the Prophet forecasting model was used to estimate PM2.5 and PM10 levels from 2022 to 2024, achieving better performance over longer time horizons. This study is particularly relevant given the urban growth and industrial activity in Puebla, factors that can contribute to the deterioration of air quality and affect the health of the population. The identification of trends and patterns in air pollution is essential for the implementation of mitigation strategies and public policies aimed at improving air quality in the region.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Este artículo presenta un análisis detallado de los contaminantes del aire en la ciudad de Puebla, México, basado en datos recopilados entre 2016 y 2024. La investigación examina la variación diaria de cinco contaminantes principales: ozono (O3), material particulado menor de 10 micras (PM10), material particulado menor de 2.5 micras (PM2.5), dióxido de azufre (SO2) y dióxido de nitrógeno (NO2). Para identificar tendencias significativas y patrones estacionales, se aplicaron la prueba de Mann-Kendall, el método de análisis de tendencia innovador y la transformada wavelet. Los resultados indican tendencias ascendentes estadísticamente significativas en las concentraciones de O3, SO2 y NO2, mientras que los niveles de PM10 y PM2.5 han mostrado una disminución sostenida a lo largo del periodo de estudio. El análisis con escalogramas revela concentraciones de energía estacional en SO2, posiblemente asociadas con la actividad industrial y las condiciones meteorológicas. Además, se utilizó el modelo de pronóstico Prophet para estimar los niveles de PM2.5 y PM10 entre 2022 y 2024, observándose un mejor desempeño del modelo en horizontes temporales más largos. Este estudio resulta especialmente relevante ante el crecimiento urbano y la actividad industrial en Puebla, factores que pueden contribuir al deterioro de la calidad del aire y afectar la salud de la población. La identificación de tendencias y patrones en la contaminación del aire es esencial para la implementación de estrategias de mitigación y políticas públicas orientadas a mejorar la calidad del aire en la región.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Puebla City]]></kwd>
<kwd lng="en"><![CDATA[wavelet transform]]></kwd>
<kwd lng="en"><![CDATA[Mann-Kendall test]]></kwd>
<kwd lng="en"><![CDATA[ITA]]></kwd>
<kwd lng="en"><![CDATA[Prophet forecasting model]]></kwd>
</kwd-group>
</article-meta>
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