lipídios como indicadores de mudanças climáticas no passado 1: biomarcadores marinhos lipids as indicators of paleoclimatic changes 1: marine biomarkers
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lipídios como indicadores de mudanças climáticas no passado 1: biomarcadores marinhos lipids as indicators of paleoclimatic changes 1: marine biomarkers

;Luiz A. S. Madureira
greece and rome 1997 Vol. 20 pp. 293-299
157
madureira1997qumicalipdios

Abstract

The distribution and abundance of specific lipid biomarkers in marine sediments can play an important rule for the reconstruction of past climatic changes. Here, it is shown the use of a widely known paleo Sea Surface Temperature (SST) proxy based on the unsaturation ratio of a suite of long-chain C37 alkenones: the alkenone unsaturation index, U K37'. These compounds are biosynthesised by only a restricted group of prymnesiophyte algae, mostly notably the coccolithophorid Emiliania huxleyi. To ilustrate the importance of the U K37' index as a molecular tool, the correlation between the SST signal derived from the U K37' and other paleoclimatic records examined in a core from the North Atlantic is discussed.

Keywords

marine sediments north atlanticchemistry

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DOI:
10.1590/S0100-40421997000300010
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http://www.scielo.br/scielo.php?script=sci_arttext...

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