<?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>S0187-62362023000300116</article-id>
<article-id pub-id-type="doi">10.20937/atm.53135</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Historical change of winter chill accumulation in some regions of Turkey]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Karadag]]></surname>
<given-names><![CDATA[Hakan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yildiz]]></surname>
<given-names><![CDATA[Kenan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yurekli]]></surname>
<given-names><![CDATA[Kadri]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Gaziosmanpa&#351;a University Faculty of Agriculture Department of Horticulture]]></institution>
<addr-line><![CDATA[Tokat ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Gaziosmanpa&#351;a University Faculty of Agriculture Department of Biosystem Engineering]]></institution>
<addr-line><![CDATA[Tokat ]]></addr-line>
<country>Turkey</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=S0187-62362023000300116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-62362023000300116&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-62362023000300116&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Deciduous fruit trees need to be exposed to low winter temperatures for a certain period of time to produce regular crops. In addition to the effects of global warming in many other areas, its effect on cold accumulation is also a reason of concern. As a result, many studies have been carried out in important horticultural areas around the world on the impact of climate change on cold accumulation. In this study, historical changes of cold accumulation calculated using five models were examined in 12 locations in Turkey for the first time. Results show that there was no significant trend in cold accumulation in the provinces of Ankara, Bingöl, Diyarbak&#305;r, Malatya, and Tunceli. In some locations, the significance, magnitude, and direction of the chilling trend differed according to the model used. All five models used in the study indicated significant decreases in winter chill accumulation in &#350;anl&#305;urfa, a site with relatively mild winters. In Erzincan, which has relatively cold winters, increasing trends were detected in cold accumulation calculated according to Utah, Modified Utah, and Positive Utah models. Results show that serious consequences may arise related to the chilling requirement of deciduous fruit trees, especially in regions with mild winters.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los árboles frutales de hoja caduca deben estar expuestos a bajas temperaturas invernales durante un cierto período de tiempo para producir cosechas regulares. Además de los efectos del calentamiento global en muchas otras áreas, su efecto sobre la acumulación de frío también es preocupante. Como resultado de ello, se han realizado estudios en importantes áreas hortícolas del mundo sobre el impacto del cambio climático en la acumulación de frío. En este estudio, por primera vez, se examinaron los cambios históricos de la acumulación de frío calculados con cinco modelos en 12 lugares de Turquía. Se determinó que no hay una tendencia significativa en la acumulación de frío en algunas de las provincias estudiadas (Ankara, Bingöl, Diyarbak&#305;r, Malatya y Tunceli). En algunas ubicaciones, la importancia, magnitud y dirección de la tendencia de enfriamiento difirieron según el modelo utilizado. Según los cinco modelos utilizados en el estudio, en la localidad de &#350;anl&#305;urfa, con inviernos relativamente suaves, se advirtieron disminuciones significativas en la acumulación de frío invernal. En Erzincan, que tiene inviernos relativamente fríos, se detectaron tendencias crecientes en la acumulación de frío calculada según los modelos de Utah, Utah modificado y Utah positivo. Los resultados han demostrado que pueden surgir graves consecuencias en términos de los requerimientos de frío de árboles de hoja caduca, especialmente en regiones con inviernos suaves.]]></p></abstract>
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<kwd lng="en"><![CDATA[climate change]]></kwd>
<kwd lng="en"><![CDATA[dynamic model]]></kwd>
<kwd lng="en"><![CDATA[Utah model]]></kwd>
<kwd lng="en"><![CDATA[temperate fruit]]></kwd>
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