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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2014
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48032997001 |
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Table of Contents:
- Variability of marine biological productivity in the northeastern Pacific over the past millennium Miryam Juárez Alberto Sánchez Oscar González-Yajimovich Ciencias de la Tierra El Niño La Niña upwelling biogenic opal organic carbon In this study we present new dat a of biogenic opal (BO), organ ic carbon (OC), and calcium carbonate (CaCO 3 ) in a high- resolution record from the western coast of Baja California Sur , Mexico. The variability of mari ne biological productivity in this area is dominated by El Niño and La Niña events on different time scale s. The BO and OC contents showed a decrease between AD 1100 and 1400. From AD 1400 to the present, BO a nd OC showed a significant incr ease, indicating permanent upwelling conditions. The CaCO 3 content showed an inverse correlation wi th OC, which suggests that the exported OC fluxes are a signifi cant factor controlling CaCO 3 dissolution in the sediment. The increase in BO and OC was synchronic with a decli ne in the number of El Niño events (6 ± 4 every 100 years) over the last 600 years of the millennium. 2014 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48032997001 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.4 Vol.40