Variability of marine biological productivity in the northeastern Pacific over the past millennium

Variability of marine biological productivity in the northeastern Pacific over the past millennium

In this study we present new data of biogenic opal (BO), organic carbon (OC), and calcium carbonate (CaCO3) in a highresolution record from the western coast of Baja California Sur, Mexico. The variability of marine biological productivity in this area is dominated by El Niño and La Niña events on d...

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Autores principales: Juárez, Miryam, Sánchez, Alberto, González-Yajimovich, Oscar
Formato: info:eu-repo/semantics/article
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2015
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2477
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spelling repositorioinstitucional-20.500.12930-74762023-05-09T14:30:57Z Variability of marine biological productivity in the northeastern Pacific over the past millennium Variabilidad de la productividad biológica marina en el Pacífico nororiental durante el último milenio Juárez, Miryam Sánchez, Alberto González-Yajimovich, Oscar In this study we present new data of biogenic opal (BO), organic carbon (OC), and calcium carbonate (CaCO3) in a highresolution record from the western coast of Baja California Sur, Mexico. The variability of marine biological productivity in this area is dominated by El Niño and La Niña events on different time scales. The BO and OC contents showed a decrease between AD 1100 and 1400. From AD 1400 to the present, BO and OC showed a significant increase, indicating permanent upwelling conditions. The CaCO3 content showed an inverse correlation with OC, which suggests that the exported OC fluxes are a significant factor controlling CaCO3 dissolution in the sediment. The increase in BO and OC was synchronic with a decline in the number of El Niño events (6 ± 4 every 100 years) over the last 600 years of the millennium.  En este trabajo se presentan nuevos datos de un registro de alta resolución de ópalo biogénico (OB), carbono orgánico (CO) y carbonato de calcio (CaCO3) en la costa occidental de Baja California Sur, México. En esta región, la variabilidad de la productividad biológica marina es dominada por la intensidad de los eventos El Niño y La Niña en diversas escalas de tiempo. Los contenidos de OB y CO disminuyeron durante el periodo de AD 1100 a 1400. En el periodo de AD 1400 al presente, el OB y CO aumentaron significativamente, lo cual indica condiciones permanentes de surgencia. El contenido de CaCO3 se correlacionó inversamente con el CO, y esto sugiere que los flujos de CO exportado son un factor significativo que controla la disolución de CaCO3 en el sedimento. El incremento en el OB y CO fue sincrónico con la disminución en el número de eventos de El Niño (6 ± 4 cada 100 años) para los últimos 600 años del milenio. 2015-03-06 2021-06-03T03:55:24Z 2021-06-03T03:55:24Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2477 10.7773/cm.v40i4.2477 https://hdl.handle.net/20.500.12930/7476 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2477/1531 Copyright (c) 2015 Ciencias Marinas application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 40 No. 4 (2014); 211-220 Ciencias Marinas; Vol. 40 Núm. 4 (2014); 211-220 2395-9053 0185-3880
institution Repositorio Institucional
collection DSpace
language eng
description In this study we present new data of biogenic opal (BO), organic carbon (OC), and calcium carbonate (CaCO3) in a highresolution record from the western coast of Baja California Sur, Mexico. The variability of marine biological productivity in this area is dominated by El Niño and La Niña events on different time scales. The BO and OC contents showed a decrease between AD 1100 and 1400. From AD 1400 to the present, BO and OC showed a significant increase, indicating permanent upwelling conditions. The CaCO3 content showed an inverse correlation with OC, which suggests that the exported OC fluxes are a significant factor controlling CaCO3 dissolution in the sediment. The increase in BO and OC was synchronic with a decline in the number of El Niño events (6 ± 4 every 100 years) over the last 600 years of the millennium. 
format info:eu-repo/semantics/article
author Juárez, Miryam
Sánchez, Alberto
González-Yajimovich, Oscar
spellingShingle Juárez, Miryam
Sánchez, Alberto
González-Yajimovich, Oscar
Variability of marine biological productivity in the northeastern Pacific over the past millennium
author_facet Juárez, Miryam
Sánchez, Alberto
González-Yajimovich, Oscar
author_sort Juárez, Miryam
title Variability of marine biological productivity in the northeastern Pacific over the past millennium
title_short Variability of marine biological productivity in the northeastern Pacific over the past millennium
title_full Variability of marine biological productivity in the northeastern Pacific over the past millennium
title_fullStr Variability of marine biological productivity in the northeastern Pacific over the past millennium
title_full_unstemmed Variability of marine biological productivity in the northeastern Pacific over the past millennium
title_sort variability of marine biological productivity in the northeastern pacific over the past millennium
publisher Iniversidad Autónoma de Baja California
publishDate 2015
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2477
_version_ 1792610339974545408

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