Publication Date:
2024-04-29
Description:
In order to assess the response of vegetation from eastern tropical South America to hydroclimate changes during the last ca. 45 kyr, we analyzed marine sediment core M125-95-3 that archived sediments from the São Francisco River drainage basin. We used the stable carbon (δ13C) and hydrogen (δD) isotopes of long-chain n-alkanes (i.e., C29-C31) to reconstruct regional vegetation composition and precipitation dynamics, respectively. The data set contains marine sedimentary records of long-chain n-alkane δ13C and δD, as well as the isotopic difference between homologues (Δδ13C31-29), and locally estimated scatterplot smoothing (LOESS) of indicated data. The δ13Cwax refers to the weighted averages of δ13C29 and δ13C31 values. The δDwax refers to the weighted averages of δD29 and δD31 values.
Keywords:
AGE; DEPTH, sediment/rock; Gas chromatography - Isotope ratio mass spectrometer (GC-IRMS); lipid biomarkers; M125; M125_469-3; M125-95-3; Meteor (1986); n-Alkane, Δδ13C (C31-C29); n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; n-alkanes; off eastern South America; PC; Piston corer; SAMBA; São Francisco river; South Atlantic Ocean; Stable carbon and hydrogen isotopes of plant-waxes; stable carbon isotopes δ13C; stable hydrogen isotopes δ2H; δ13C, wax; δ13C, wax, standard deviation; δ Deuterium, wax; δ Deuterium, wax, standard deviation
Type:
Dataset
Format:
text/tab-separated-values, 745 data points
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