<?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>S0187-62362023000200329</article-id>
<article-id pub-id-type="doi">10.20937/atm.53056</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Patterns related to pollutant concentrations in the Metropolitan Area of Belo Horizonte, Brazil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendes]]></surname>
<given-names><![CDATA[Luiza Maria Marcos Cerqueira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvalho]]></surname>
<given-names><![CDATA[Vanessa Silveira Barreto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[Fabrina Bolzan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albuquerque]]></surname>
<given-names><![CDATA[Taciana Toledo de Almeida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal de Itajubá Instituto de Recursos Naturais ]]></institution>
<addr-line><![CDATA[Itajubá Minas Gerais]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal de Minas Gerais Departamento de Engenharia e Sanitária Ambiental ]]></institution>
<addr-line><![CDATA[Belo Horizonte Minas Gerais]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>36</volume>
<numero>2</numero>
<fpage>329</fpage>
<lpage>341</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-62362023000200329&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-62362023000200329&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-62362023000200329&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Air pollution from human and industrial activities has been a major concern in recent years. Among the various pollutants found in the atmosphere, particulate matter (PM) and ozone (O3) show significant occurrences, with high concentrations in urban centers frequently associated with environmental and public health problems. Therefore, this study uses the analysis of variance (ANOVA) technique and Tukey&#8217;s test to investigate patterns related to the variability of maximum daily O3 concentrations and mean daily concentrations of PM with a diameter less than 10 &#956;m (PM10), registered between 2007 and 2012 through six sites in the Metropolitan Area of Belo Horizonte, Brazil. To this end, the data were analyzed using ANOVA arranged in a factorial scheme (6 × 4 × 2) with four repetitions per treatment, followed by Tukey&#8217;s test. In the ANOVA and Tukey&#8217;s test, the first factor (A) represents the six air quality monitoring stations, the second (B) represents the seasons, and the third (C), the measurements carried out during working days and weekends. Seasonal variability patterns show higher concentrations of O3 in spring and of PM10 in winter. The values were 22.9 and 35.32% higher than the annual averages of O3 and PM10 concentrations, respectively. The mean values for working days and weekends showed different patterns for the two pollutants. PM10 concentrations were 11% higher during working days when compared to weekends. The O3 weekend effect was found only in one of the stations. The profiles of vehicular and industrial emissions have been identified as a potential factor leading to these results.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La contaminación del aire por actividades humanas e industriales ha sido una gran preocupación en los últimos años. Entre los diversos contaminantes que se encuentran en la atmósfera, el material particulado (PM) y el ozono (O3) muestran ocurrencias significativas, con altas concentraciones en los centros urbanos frecuentemente asociadas con problemas ambientales y de salud pública. Por lo tanto, este trabajo utiliza la técnica de análisis de varianza (ANOVA) y la prueba de Tukey para investigar los patrones relacionados con la variabilidad de las concentraciones máximas diarias de O3 y las concentraciones medias diarias de MP con diámetro menor a 10 &#956;m (PM10), registradas entre 2007 y 2012 en seis sitios de la región metropolitana de Belo Horizonte, Brasil. Para ello, los datos se analizaron mediante ANOVA dispuestos en un esquema factorial (6 × 4 × 2) con cuatro repeticiones por tratamiento, seguido de la prueba de Tukey. En el ANOVA y la prueba de Tukey, el primer factor (A) representa las seis estaciones de monitoreo de la calidad del aire, el segundo (B) representa las estaciones y el tercero (C) las mediciones realizadas durante los días hábiles y fines de semana. Los patrones de variabilidad estacional muestran concentraciones más altas de O3 en la primavera y de PM10 en el invierno. Los valores fueron 22.9 y 35.32% superiores a los promedios anuales de concentraciones de O3 y PM10, respectivamente. Los valores medios para los días laborables y los fines de semana mostraron patrones diferentes para los dos contaminantes. Las concentraciones de PM10 fueron 11% más altas durante los días laborables en comparación con los fines de semana. El efecto de fin de semana de O3 se encontró sólo en una de las estaciones. Los perfiles de emisiones vehiculares e industriales se han identificado como un factor potencial que conduce a estos resultados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[ANOVA]]></kwd>
<kwd lng="en"><![CDATA[Ozone]]></kwd>
<kwd lng="en"><![CDATA[Particulate Matter]]></kwd>
</kwd-group>
</article-meta>
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