<?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>S0187-62362021000200227</article-id>
<article-id pub-id-type="doi">10.20937/atm.52790</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The mid-summer drought spatial variability over Mesoamerica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Oliva]]></surname>
<given-names><![CDATA[Lilian C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pazos]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Université Grenoble Alpes  ]]></institution>
<addr-line><![CDATA[Saint-Martin-d&#8217;Hères ]]></addr-line>
<country>France</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de San Carlos de Guatemala Escuela de Ciencias Físicas y Matemáticas Instituto de Investigación]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Guatemala</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>34</volume>
<numero>2</numero>
<fpage>227</fpage>
<lpage>232</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-62362021000200227&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-62362021000200227&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-62362021000200227&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The region that includes southern Mexico and Central America is known as Mesoamerica. The annual cycle of precipitation characteristic of the Pacific slope of this region presents a bimodal distribution on summertime, with two maxima and a relative intraseasonal minimum, known as the Mid-Summer Drought (MSD). In this study, the small-scale (tens of kilometers) variability of the MSD is analyzed. Numerical simulations are performed using the regional climate model RegCM4 over a Mesoamerican domain for a six-year period. ERA Interim reanalysis data is used as initial and lateral boundary conditions. The domain is subdivided into smaller areas and the average annual cycle of precipitation distribution is computed for each of them. The MSD pattern is found to present a high spatial variability in the intensity of its two maxima and even the total absence of its characteristic minimum. Such behavior is attributed to soil-atmosphere and terrain topography interactions that are better resolved with a regional climate model.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La región del Sur de México y América Central conforman lo que se conoce como Mesoamérica. El ciclo anual de precipitación característico de la vertiente del Pacífico de esta región presenta una distribución anual bimodal, con dos máximos y un mínimo relativo intraestacional que se conoce como veranillo o canícula. En este estudio se analiza la variabilidad a pequeña escala (decenas de kilómetros) del veranillo. Se realizaron simulaciones numéricas utilizando el modelo de área limitada RegCM4 sobre un dominio en la región de Mesoamérica, para un periodo de seis años. Se utilizaron los datos de reanálisis de ERA Interim como condiciones iniciales y de frontera lateral. El dominio fue subdividido en áreas más pequeñas y se calculó la precipitación promedio mensual para cada una de ellas. Los resultados muestran que la canícula o veranillo presenta una alta variabilidad espacial en la intensidad de sus dos máximos, e incluso la ausencia total del valor mínimo que la caracteriza. Tal comportamiento se atribuye a las interacciones de la atmósfera con el suelo y a la topografía del terreno que son mejor representadas en un modelo climático regional.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Mid-Summer Drought]]></kwd>
<kwd lng="en"><![CDATA[Mesoamerica]]></kwd>
<kwd lng="en"><![CDATA[precipitation]]></kwd>
<kwd lng="en"><![CDATA[variability]]></kwd>
<kwd lng="en"><![CDATA[regional model]]></kwd>
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