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Resumen del producto
Juárez Fonseca, M., A., Sánchez González & M.S., Cota Meza
(2013).
Variability of elemental composition and stable carbon isotopes in tropical northeastern Pacific during the last two thousand years.
CalCOFI Conference 2013.
La Jolla, California, USA, Estados Unidos de América, diciembre 9 - 11, 2013,
1.
Variability of elemental composition and stable carbon isotopes in tropical northeastern Pacific during the last two thousand years
Miryam Juárez Fonseca, Alberto Sánchez González y María Soledad Cota Meza
Organic matter in the water columns and sediments of transitional environments and oceans is often described as a binary mixture of terrestrial and aquatic end members. Molar C:N ratios and d13C of samples and end members are often used in linear mixing equations to estimate the fraction of terrestrially derived organic matter (OM) in aquatic and sedimentary environments. In this paper we showed new data from the ratio C:N and d13C of marine sediment multi-core was raised from a water depth of 680 m on the open margin off the western coast of southern Baja California. The ratio C:N and d13C values of sedimentary organic matter showed a variability of centennial scale over the past 2000 years. The d13C values suggest that the origin of the organic matter was primarily dominated by phytoplankton source (i.e., diatoms) corresponding to periods of high solar activity. The variability of the sources of organic matter is apparently controlled by solar forcing.
Palabras clave: Organic matter; stable carbon isotopes; water columns
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