<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792015000300221</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Fractal analysis of monthly evaporation and precipitation time series at central Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis fractal de series de tiempo de evaporación y precipitación mensual en el centro de México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magallanes Quintanar]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdez Cepeda]]></surname>
<given-names><![CDATA[Ricardo David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez Gallegos]]></surname>
<given-names><![CDATA[Santiago de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno Báez]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina García]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco Macías]]></surname>
<given-names><![CDATA[Fidel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Zacatecas Unidad Académica de Ingeniería Eléctrica ]]></institution>
<addr-line><![CDATA[Zacatecas Zac.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo Centro Regional Universitario Centro Norte ]]></institution>
<addr-line><![CDATA[Zacatecas Zac.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Zacatecas Unidad Académica de Matemáticas ]]></institution>
<addr-line><![CDATA[Zacatecas Zac.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Colegio de Postgraduados Campus San Luis Potosí ]]></institution>
<addr-line><![CDATA[San Luis Potosí S.L.P.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Exp. Zacatecas ]]></institution>
<addr-line><![CDATA[Calera de V. R. Zacatecas]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<fpage>221</fpage>
<lpage>231</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792015000300221&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792015000300221&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792015000300221&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Advances on climate change research, as well as the assessment of the potential impacts of climate change on water resources, would allow the understanding of the spatial and temporal variability of land-surface precipitation and evaporation time series at local and regional levels. In the present study, the spectral analysis approach was applied on monthly evaporation and precipitation anomaly time series with the aim of estimating their self-affinity statistics. The behavior of estimated fractal dimension values of evaporation time series throughout Zacatecas State territory is irregular, and noise in all the evaporation anomaly time series tends to have a persistent behavior. On the other hand, the behavior of estimated fractal dimension values of most of the precipitation time series throughout Zacatecas State territory tends to be like the Brownian motion. Self-affinity statistics of monthly evaporation or precipitation anomaly time series and geographic coordinates of 32 stations were used to estimate correlation coefficients; the results are compelling evidence concerning monthly precipitation anomaly behavior tends to be more regular toward North of Zacatecas State territory, that is, toward driest areas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Los avances de investigación sobre cambio climático en México, así como la evaluación de los impactos potenciales de dicho cambio sobre los recursos hídricos pueden conllevar a un mejor entendimiento de la variación temporal y espacial sobre la superficie terrestre al considerar las series de tiempo de evaporación y precipitación a niveles local y regional. En el presente estudio se aplicó la técnica de análisis espectral sobre series mensuales de anomalías de evaporación y precipitación con el objetivo de estimar sus estadísticos de autoafinidad. El comportamiento de los valores estimados de dimensión fractal de las series de tiempo de las anomalías de evaporación registradas en el territorio del estado de Zacatecas fue irregular y el ruido en todas ellas tuvo un comportamiento persistente. Por otra parte, los valores estimados de dimensión fractal de las series de tiempo de las anomalías de precipitación presentaron un comportamiento parecido al del movimiento browniano. Las estadísticas de autoafinidad de las series de tiempo de anomalías de evaporación o precipitación y las coordenadas geográficas de 32 estaciones fueron empleadas para estimar coeficientes de correlación; los resultados muestran que el comportamiento de las anomalías de la precipitación mensual tiende a ser más regular hacia el norte del territorio del estado de Zacatecas; es decir, hacia las áreas más secas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[self-affinity]]></kwd>
<kwd lng="en"><![CDATA[fractal dimension]]></kwd>
<kwd lng="en"><![CDATA[spectral analysis]]></kwd>
<kwd lng="es"><![CDATA[autoafinidad]]></kwd>
<kwd lng="es"><![CDATA[dimensión fractal]]></kwd>
<kwd lng="es"><![CDATA[análisis espectral]]></kwd>
</kwd-group>
</article-meta>
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