<?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>S0187-62362023000300102</article-id>
<article-id pub-id-type="doi">10.20937/atm.53102</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A breviary of Earth&#8217;s climate changes using Stephan-Boltzmann law]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murray-Tortarolo]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Investigaciones en Ecosistemas y Sustentabilidad ]]></institution>
<addr-line><![CDATA[Morelia ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>37</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-62362023000300102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-62362023000300102&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-62362023000300102&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Earth&#8217;s surface temperature has oscillated greatly throughout time. From near total freezing during the &#8220;snowball Earth&#8221; (2.9) Ga to an ice-free world in the Paleocene-Eocene thermal maximum 55 (Ma). These changes have been forced by internal (e.g., changes in the chemical composition of the atmosphere) or external (e.g., changes in solar irradiance) drivers that varied through time. Thus, if we understand how the radiation budget evolved at different times, we can approximate past global climate, a fundamental comparison to situate current climate change in the context Earth&#8217;s history. Here I present an analytical framework employing a simple energy balance derived from the Stephan-Boltzmann law, that allows for quick comparison between drivers of global temperature at multiple times during the history of our planet. My results show that current rates of increase in global temperature are at least four times faster than any previous warming event.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La temperatura de la superficie terrestre ha variado ampliamente en el pasado. Desde casi la congelación total, en el evento conocido como &#8220;Tierra bola de nieve&#8221; hace 2.9 Ga a un mundo sin hielo en la transición del Paleoceno al Eoceno, hace 55 Ma. Los motores de estos cambios han sido tanto internos (p. ej., alteraciones en la composición química de la atmósfera) como externos (p. ej., cambios en la radiación solar) y han cambiado en el tiempo. Por lo tanto, si comprendemos cómo ha evolucionado el balance radiativo terrestre en diferentes momentos, podemos estimar el clima del pasado, una comparación fundamental para situar el cambio climático actual en el contexto paleoclimático terrestre. En este artículo presento un balance energético simple derivado de la ley de Stephan-Boltzmann, para comparar de forma sencilla cómo los motores del clima han modificado la temperatura global en distintos momentos clave de la historia de nuestro planeta. Mis resultados muestran que las tasas de cambio de la temperatura actual son al menos cuatro veces más rápidas que cualquier evento de calentamiento previo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[climate change]]></kwd>
<kwd lng="en"><![CDATA[paleoclimate]]></kwd>
<kwd lng="en"><![CDATA[radiation budget]]></kwd>
<kwd lng="en"><![CDATA[Earth&#8217;s temperature]]></kwd>
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