<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342014001401963</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento espacio temporal de la evapotranspiración de referencia en la República Mexicana]]></article-title>
<article-title xml:lang="en"><![CDATA[Spatiotemporal behaviour of the reference evapotranspiration in Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruíz Álvarez]]></surname>
<given-names><![CDATA[Osías]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corrales Suastegui]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Jasso]]></surname>
<given-names><![CDATA[Luis Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz García]]></surname>
<given-names><![CDATA[Luis Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Narváez Mendoza]]></surname>
<given-names><![CDATA[Mario P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ontiveros Capurata]]></surname>
<given-names><![CDATA[Ronald Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruíz Corral]]></surname>
<given-names><![CDATA[José Ariel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias Laboratorio Nacional de Modelaje y Sensores Remotos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias diaz.antonio@inifap.gob.mx ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de la Sierra Juárez  ]]></institution>
<addr-line><![CDATA[Ixtlán de Juárez ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias Campo Experimental Centro ]]></institution>
<addr-line><![CDATA[Tepatitlán Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>5</volume>
<numero>spe10</numero>
<fpage>1963</fpage>
<lpage>1976</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342014001401963&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342014001401963&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342014001401963&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La gestión de los recursos hídricos requiere información precisa relativa a la evapotranspiración de referencia (ETO), variable meteorológica indispensable en la explicación de procesos ambientales físicos. El presente trabaj o tuvo como objetivo estudiar la variabilidad espacial y temporal de ETO en una red de estaciones meteorológicas automáticas durante un período de tres años. Se utilizó el modelo estándar de Penman-Monteith modificado por la FAO (FPM) y se alimentó con velocidad del viento, temperatura y radiación de onda corta; con estas dos últimas variables se obtuvo el déficit de presión de vapor (es- ea) y la radiación neta (Rn). La variabilidad espacial se debe al efecto combinado de las variables que afectan la ETO como son Rn y la humedad atmosférica. En diciembre y enero los valores bajos se ubican al norte del país, en los estados de la costa del golfo y en una porción pequeña del oeste; mientras que estados del sur y centro de México presentan valores más altos. En los meses cálidos los valores más altos se encuentran al norte, noreste, noroeste y norte-centro y más bajos en estados del sur y sureste. Las diferencias de ETO en tiempo y espacio se traducen en diferencias en el ciclo hidrológico y en discrepancias en los volúmenes de riego. Estos resultados significan una base de datos importante para estudios agroclimáticos futuros.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The management of water resources requires accurate information on reference evapotranspiration (ETO) necessary meteorological variable in explaining physical environmental processes. The present work aimed to study the spatial and temporal variability of ETO on a network ofautomatic weather stations over a period of three years. We used the standard model Penman-Monteith modified by FAO (FPM) and fed with wind speed, temperature and short wave radiation; with the latter two variables the vapour pressure deficit (es- ea and net radiation (Rn were obtained. Spatial variability is due to the combined effect ofthe variables that affect ETO such as Rn and atmospheric humidity. In December and January, the low values are located in the north ofthe country, in the States ofthe Gulf Coast and in a small portion of the west; while southern and central Mexico Sates have higher values. In the warm months, the highest values are located in the north, northeast, northwest and north-central States and the lowest in the south and southeast. ETO differences in time and space transíate into differences in the hydrological cycle and discrepancies in the volumes of irrigation. These results signify an important database for future agro-climatic studies.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[estación meteorológica]]></kwd>
<kwd lng="es"><![CDATA[evapotranspiración de referencia]]></kwd>
<kwd lng="es"><![CDATA[riego]]></kwd>
<kwd lng="en"><![CDATA[irrigation]]></kwd>
<kwd lng="en"><![CDATA[reference evapotranspiration]]></kwd>
<kwd lng="en"><![CDATA[weather station]]></kwd>
</kwd-group>
</article-meta>
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