<?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>0188-6266</journal-id>
<journal-title><![CDATA[Acta universitaria]]></journal-title>
<abbrev-journal-title><![CDATA[Acta univ]]></abbrev-journal-title>
<issn>0188-6266</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Guanajuato, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-62662019000100244</article-id>
<article-id pub-id-type="doi">10.15174/au.2019.2481</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación del efecto de distintas aproximaciones de la radiación en la estimación de la evapotranspiración usando el modelo FAO Penman-Monteith]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of the effect of different radiation approaches on the estimation of evapotranspiration using the FAO Penman-Monteith model]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orozco Medina]]></surname>
<given-names><![CDATA[Ismael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarado Barrientos]]></surname>
<given-names><![CDATA[María Susana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-de la Cruz]]></surname>
<given-names><![CDATA[Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Orozco]]></surname>
<given-names><![CDATA[Aldo Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guanajuato  ]]></institution>
<addr-line><![CDATA[Guanajuato Gto.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Ecología, A.C.  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Colima Facultad de Ingeniería Civil ]]></institution>
<addr-line><![CDATA[Coquimatlán ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Tecnológico de Monterrey Centro del Agua para América Latina y el Caribe ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>29</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-62662019000100244&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-62662019000100244&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-62662019000100244&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La evapotranspiración es uno de los procesos que mayor importancia tienen en la correcta cuantificación de la disponibilidad hídrica, pero es de los más difíciles de estimar del ciclo hidrológico en regiones con escasa información meteorológica. Una alternativa que se ha popularizado para resolver la problemática anterior es el uso de productos de satélite con estimaciones de la evapotranspiración a escala regional. Sin embargo, estos deben ser validados con información de campo adecuada antes de su aplicación regional, la cual es casi inexistente en latitudes tropicales. Por ello, esta investigación propone una mejora a la ecuación de la FAO Penman-Monteith, al introducir variabilidad espacial y temporal de la radiación neta (Rn) a través del algoritmo Viewshed. Los resultados muestran una mejora del 1.1% al comparar los resultados de la evapotranspiración de referencia con las estimaciones provenientes del producto satelital MOD16A3 y usando la forma tradicional de calcular la Rn.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Evapotranspiration is a very important process in the correct calculation of water availability, but it is one of the most difficult to estimate the hydrological cycle in regions with limited meteorological information. An alternative recently used to solve this problem is the use of satellite products with evapotranspiration at a regional scale. However, these products must be validated with information observed for their regional application, but the information is difficult to obtain in tropical latitudes. To solve this, an improvement to the FAO Penman-Monteith equation is proposed by including the spatial and temporal variability of the net radiation (Rn) with the Viewshed algorithm. The results show an improvement of 1.1% when comparing the results of the reference evapotranspiration against the estimates coming from the satellite product MOD16A3 and using the traditional calculation form of Rn.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Evapotranspiración de referencia]]></kwd>
<kwd lng="es"><![CDATA[FAO Penman-Monteith]]></kwd>
<kwd lng="es"><![CDATA[algoritmo Viewshed]]></kwd>
<kwd lng="es"><![CDATA[radiación]]></kwd>
<kwd lng="es"><![CDATA[MODIS]]></kwd>
<kwd lng="en"><![CDATA[Reference evapotranspiration]]></kwd>
<kwd lng="en"><![CDATA[FAO Penman-Monteith]]></kwd>
<kwd lng="en"><![CDATA[viewshed algorithm]]></kwd>
<kwd lng="en"><![CDATA[radiation]]></kwd>
<kwd lng="en"><![CDATA[MODIS]]></kwd>
</kwd-group>
</article-meta>
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<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Mulholland]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Baldocchi]]></surname>
<given-names><![CDATA[D. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Wullschleger]]></surname>
<given-names><![CDATA[S. D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A comparison of methods for determining forest evapotranspiration and its components: Sap-flow, soil water budget, eddy covariance and catchment water balance]]></article-title>
<source><![CDATA[Agricultural and Forest Meteorology]]></source>
<year>2001</year>
<volume>106</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>153-68</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
