<?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>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822022000400124</article-id>
<article-id pub-id-type="doi">10.18845/tm.v35i4.5778</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comparación de métodos de detección del inicio y término de la estación lluviosa basado en datos de precipitación]]></article-title>
<article-title xml:lang="en"><![CDATA[Comparison of detection methods for the onset and demise of the rainy season based on precipitation data]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ureña-Mora]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alfaro]]></surname>
<given-names><![CDATA[Eric J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigación en Ciencias del Mar y Limnología ]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigaciones Geofísicas. Centro de Investigación en Ciencias del Mar y Limnología Escuela de Física]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>35</volume>
<numero>4</numero>
<fpage>124</fpage>
<lpage>137</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822022000400124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822022000400124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822022000400124&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Diferentes metodologías han sido propuestas para la detección del inicio y término de la estación lluviosa que incluyen el área de América Central. Índices de temperatura superficial del mar, descomposición de valores singulares, mínimos cuadrados, pentadas de precipitación, desviación de la precipitación acumulada, han sido analizados por otros autores. Este estudio compara dos metodologías que utilizan únicamente observaciones de la precipitación, la primera consiste en el análisis de la precipitación acumulada diaria y la segunda consiste en calcular la desviación de la precipitación acumulada (DPA), ambas metodologías sujetas a diferentes criterios de detección. Adicionalmente se propone y se agrega a la comparación una modificación del criterio basado en la DPA. Se analiza el registro diario de 101 estaciones pluviométricas con régimen anual bimodal en América Central desde 1968 al 2012. Se encontró que la metodología basada en DPA detecta falsos inicios de la estación lluviosa (IELL) y alarga la detección del término de la estación lluviosa (TELL). Al compararlo con el método basado en DPA, el criterio propuesto obtuvo un valor similar de tendencia central del IELL, TELL y la duración de la estación lluviosa, además muestra menos variabilidad que los otros dos métodos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Several methodologies have been proposed for the onset and demise dates of the rainy season in the Central American isthmus. Sea surface temperature indices, singular value decomposition, least squares method, precipitation pentads, accumulated precipitation deviation, have been analyzed by other authors. This study compares two methodologies that use only precipitation observations, the first one consists of accumulated daily precipitation analysis and the second computes the accumulated precipitation deviation (APD), both methodologies subject to different detection criteria. Additionally, a modification of the criterion based on the APD is proposed and added to the comparison. A daily set of 101 bimodal annual cycle rain gauge stations in Central America from 1968 to 2012 is used. We found that the APD-based methodology detects false onsets and lengthens the demise of the rainy season. Between the results of the pentad method, the proposed criterion achieves a similar central tendency date of the onset, demise and the duration of the rainy season, in addition it shows less variability than the other two methods.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Inicio y término de la estación lluviosa]]></kwd>
<kwd lng="es"><![CDATA[América Central]]></kwd>
<kwd lng="es"><![CDATA[precipitación]]></kwd>
<kwd lng="es"><![CDATA[variabilidad climática]]></kwd>
<kwd lng="en"><![CDATA[Onset and demise of the rainy season]]></kwd>
<kwd lng="en"><![CDATA[Central America]]></kwd>
<kwd lng="en"><![CDATA[precipitation]]></kwd>
<kwd lng="en"><![CDATA[climate variability]]></kwd>
</kwd-group>
</article-meta>
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