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Relationship of the tetra-unsaturated C-37 alkenone to salinity and temperature: Implications for paleoproxy applications ArchiMer
Sikes, El; Sicre, Ma.
This study assesses the relationship to salinity and temperature of the levels of the tetra-unsaturated 37-carbon methyl alkenone (C-37:4) in the surface ocean. U-37(K'), a measure of the relative abundances of the C-37:2 and the C-37:3 alkenones, has a well constrained linear relationship to temperature in the open ocean [Prahl and Wakeham, 1987] and is a well-established technique for estimating past sea surface temperatures in the sediments (e. g. [Muller et al., 1998]). Unlike the di- and tri-unsaturated C-37 alkenones, the temperature response of the tetra-unsaturated C-37 alkenone is less certain [Sikes et al., 1997], and recent work has suggested a relationship to salinity instead [Rosell-Mele, 1998; Schulz et al., 2000]. Our study examined 106...
Tipo: Text Palavras-chave: Alkenones; Paleosalinity; Marine organic geochemistry; Organic geochemistry; Paleoceanography; Organic marine chemistry.
Ano: 2002 URL: https://archimer.ifremer.fr/doc/00223/33414/31886.pdf
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Salinity and stable oxygen isotope relationship in the Southwestern Atlantic: constraints to paleoclimate reconstructions Anais da ABC (AABC)
BELEM,ANDRE L.; CARICCHIO,CAMILLA; ALBUQUERQUE,ANA LUIZA S.; VENANCIO,IGOR M.; ZUCCHI,MARIA DO R.; SANTOS,TARCIO HENRIQUE R. DOS; ALVAREZ,YACI GALLO.
Abstract: Stable isotopes have been widely used in the literature both to discuss current ocean circulation processes, as well as to reconstitute paleoceanographic parameters. The distribution of oxygen and deuterium stable isotopes in seawater (δ18Osw and δDsw) at the Western Tropical South Atlantic border was investigated to better understand the main fractionation processes of these isotopes and establish a regional salinity and δ18Osw relation to improve the paleoceanographic knowledge in the region. This study was conducted during a quasi-synoptic oceanographic cruise in which 98 discrete seawater samples were collected in the core of the main water masses for stable isotope analysis. A strong correlation between δ18Osw and δD was found, which made it...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Paleosalinity; Stable isotopes; Southwestern Atlantic; Oxygen 18; Seawater isotopic composition.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500504
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