<?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>0188-4611</journal-id>
<journal-title><![CDATA[Investigaciones geográficas]]></journal-title>
<abbrev-journal-title><![CDATA[Invest. Geog]]></abbrev-journal-title>
<issn>0188-4611</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Geografía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-46112018000300002</article-id>
<article-id pub-id-type="doi">10.14350/rig.59679</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effects of ENSO on precipitation in Mexico City]]></article-title>
<article-title xml:lang="es"><![CDATA[Los efectos del ENOS sobre la precipitación en la Ciudad de México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bravo Cabrera]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Azpra Romero]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodriguez Gonzalez]]></surname>
<given-names><![CDATA[Francisco Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodriguez López]]></surname>
<given-names><![CDATA[Olivia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UNAM Centro de Ciencias de la Atmósfera ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UNAM Centro de Ciencias de la Atmósfera ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Ingeniería y Arquitectura ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Mexicano de Tecnología del Agua  ]]></institution>
<addr-line><![CDATA[Jiutepec Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<numero>97</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-46112018000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-46112018000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-46112018000300002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This study investigates the relationship between the phenomenon known as El Niño-Southern Oscillation, characterized by the ENSO Multivariate Index, and the annual precipitation around Mexico City. The spatial and temporal behavior of precipitation during the 1950-2010 period was also assessed, revealing that during the period mentioned the annual mean precipitation does not show a linear trend, but a variation with a single cycle only. Contingency tables and the Chi-square test were used to reject the hypothesis of independence between precipitation and ENSO. In addition, the bootstrap resampling technique showed that negative ENSO phases reduce precipitation in the Mexico City area; the neutral phase increases precipitation and lowers the probability that precipitation be below the median value. During the positive phase, precipitation is not significantly affected.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se estudia la relación que existe entre el Fenómeno de El Niño-Oscilación del Sur, caracterizado por el Índice Multivariado del ENOS, y la precipitación en la Ciudad de México en escala anual. Se estudia también su comportamiento espacial y temporal durante el periodo 1950-2010 encontrándose que en el periodo de estudio el promedio anual de la lluvia no presenta tendencia lineal pero si un ciclo de variación. Se usan tablas de contingencia y la prueba Ji-cuadrada para rechazar la hipótesis de independencia entre la precipitación y el fenómeno ENOS. Además, se utilizó la técnica de remuestreo de bootstrap, encontrando que la fase negativa de ENOS disminuye la precipitación en la Ciudad de México; la fase neutra aumenta la precipitación y disminuye la probabilidad de que la precipitación sea inferior al valor mediano. Durante la fase positiva, la precipitación no se ve significativamente afectada.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[El Niño]]></kwd>
<kwd lng="en"><![CDATA[Southern Oscillation]]></kwd>
<kwd lng="en"><![CDATA[Mexico City precipitation]]></kwd>
<kwd lng="en"><![CDATA[spatial and temporal distribution]]></kwd>
<kwd lng="es"><![CDATA[El Niño]]></kwd>
<kwd lng="es"><![CDATA[Oscilación del Sur]]></kwd>
<kwd lng="es"><![CDATA[precipitación en la Ciudad de México]]></kwd>
<kwd lng="es"><![CDATA[distribución espacial y temporal]]></kwd>
</kwd-group>
</article-meta>
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