<?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>2215-2563</journal-id>
<journal-title><![CDATA[Revista Geográfica de América Central]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Geog. Amer. Central]]></abbrev-journal-title>
<issn>2215-2563</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-25632024000100491</article-id>
<article-id pub-id-type="doi">10.15359/rgac.72-1.18</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El fenómeno ENOS y el análisis de la variabilidad de las series de tiempo de precipitación en el Área de Conservación Guanacaste, Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[El Niño Southern Oscillation (ENSO) phenomenon and the analysis of time series variability in precipitation within the Guanacaste conservation area, Costa Rica]]></article-title>
<article-title xml:lang="pt"><![CDATA[O fenômeno ENOS e a análise da variabilidade das séries temporais de precipitação na Área de Conservação Guanacaste, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega Araya]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<numero>72</numero>
<fpage>491</fpage>
<lpage>513</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-25632024000100491&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-25632024000100491&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-25632024000100491&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El pacífico noroeste de Costa Rica es una región con una estacionalidad en el régimen de lluvias muy marcada. Sumado a dicha estacionalidad, esta área de Costa Rica es propensa a fenómenos hidroclimáticos extremos como sequías e inundaciones, por ejemplo. La escasa distribución de pluviómetros o bien, la no disponibilidad de información pertinente, hacen que los datos complementarios obtenidos de satélites y sus respectivas reanálisis, sean fundamentales para disponer de información crucial y así poder fundamentar las acciones de gestión del recurso hídrico y sus repercusiones en los ecosistemas, tanto naturales como productivos. Para analizar los patrones de precipitación, se analizaron las series de tiempo de precipitación del producto CHIRPS para cinco ecorregiones delimitadas en el Área de Conservación Guanacaste, en el Pacífico noroeste de Costa Rica. Estas curvas se correlacionaron con las series de tiempo de las regiones de monitoreo de la temperatura superficial del mar en las regiones Niño 1.2, Niño 3, Niño 3.4 y Niño 4. Todas las ecorregiones analizadas correlacionaron de forma negativa y fuertemente con la región del Niño 1.2, con valores de R entre -0.72 y -0.74. Por otra parte, se detectó un rezago en la curva de Niño 4 de cuatro a cinco meses, con la curva de la región Niño 1.2. El estudio sugiere que la anomalía del Niño 4, con un desfase de aproximadamente 4 a 5 meses, puede ser utilizada como indicador de posibles impactos en los patrones de precipitación en las diferentes ecorregiones estudiadas. Este tiempo es suficiente para planear acciones, sobre todo en el sector agroproductivo. En este trabajo se muestra el potencial de predictibilidad de los efectos del fenómeno ENOS sobre el patrón de la precipitación para áreas extensas y con cierta homogeneidad ecosistémica, como son las ecorregiones en el Área de Conservación Guanacaste.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The Pacific Northwest of Costa Rica is a region with marked seasonality in rainfall patterns. This area of Costa Rica is prone to extreme hydroclimatic phenomena such as droughts and floods. Due to the limited distribution of rainfall gauges and the unavailability of relevant information, complementary data obtained from satellites and their respective reanalyzes become imperative for acquiring crucial information. This information can support water resource management actions and their impacts on both natural and productive ecosystems. To analyze the precipitation patterns, we utilized the CHIRPS product&#8217;s precipitation time series for five ecoregions within the Guanacaste Conservation Area, located in the northwestern Pacific region of Costa Rica. These curves were strongly and negatively correlated with time series from sea surface temperature monitoring regions, including Niño 1.2, Niño 3, Niño 3.4, and Niño 4. All analyzed ecoregions exhibited strong negative correlations with the Niño 1.2 region, with correlation coefficients (R values) ranging between -0.72 to -0.74. Additionally, a lag of four to five months was observed in the Niño 4 curve compared to the Niño 1.2 region. This study suggests that the Niño 4 anomaly, with a lag of approximately 4 to 5 months, can serve as an indicator of possible impacts on precipitation patterns in different ecoregions. This provides sufficient time to plan actions, particularly within the agricultural sector. This study demonstrates the potential predictability of the effects of ENSO phenomenon on precipitation patterns for large areas with a certain eco-systemic homogeneity, such as the ecoregions in the Guanacaste Conservation Area.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O noroeste pacífico da Costa Rica é uma região com uma estacionalidade no regime de chuvas muito marcada. Somado a essa sazonalidade, esta área da Costa Rica é propensa a fenômenos hidroclimáticos extremos como secas e inundações, por exemplo. A distribuição limitada de pluviômetros ou a falta de disponibilidade de informações relevantes fazem com que os dados complementares obtidos de satélites e suas respectivas reanálises sejam fundamentais para obter informações cruciais e, assim, embasar as ações de gestão dos recursos hídricos e suas repercussões nos ecossistemas, tanto naturais quanto produtivos. Para analisar os padrões de precipitação, foram analisadas as séries temporais de precipitação do produto CHIRPS para cinco ecorregiões delimitadas na Área de Conservação Guanacaste, no Pacífico noroeste da Costa Rica. Estas curvas foram correlacionadas com as séries temporais das regiões de monitoramento da temperatura superficial do mar nas regiões Niño 1.2, Niño 3, Niño 3.4 e Niño 4. Todas as ecorregiões analisadas correlacionaram de forma negativa e forte com a região do Niño 1.2, com valores de R entre -0.72 e -0.74. Além disso, foi detectado um atraso na curva do Niño 4 de quatro a cinco meses, em relação à curva da região Niño 1.2. O estudo sugere que a anomalia do El Niño 4, com um desfasamento de aproximadamente 4 a 5 meses, pode ser utilizada como indicador de possíveis impactos nos padrões de precipitação nas diferentes ecorregiões estudadas. Este tempo é suficiente para planejar ações, especialmente no setor agroprodutivo. Neste trabalho, é demonstrado o potencial de previsibilidade dos efeitos do fenômeno ENOS sobre o padrão de precipitação em áreas extensas e com certa homogeneidade ecossistêmica, como as ecorregiões na Área de Conservação Guanacaste.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Área de Conservación Guanacaste]]></kwd>
<kwd lng="es"><![CDATA[precipitación]]></kwd>
<kwd lng="es"><![CDATA[ecorregiones]]></kwd>
<kwd lng="es"><![CDATA[ENOS]]></kwd>
<kwd lng="en"><![CDATA[Guanacaste Conservation Area]]></kwd>
<kwd lng="en"><![CDATA[precipitation]]></kwd>
<kwd lng="en"><![CDATA[ecoregions]]></kwd>
<kwd lng="en"><![CDATA[ENSO]]></kwd>
<kwd lng="pt"><![CDATA[Área de Conservação Guanacaste]]></kwd>
<kwd lng="pt"><![CDATA[precipitação]]></kwd>
<kwd lng="pt"><![CDATA[ecorregiões]]></kwd>
<kwd lng="pt"><![CDATA[ENOS]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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