Ferreira, Jaqueline Q; Chiessi, Cristiano Mazur; Hirota, Marina; Oliveira, Rafael S; Prange, Matthias; Häggi, Christoph; Crivellari, Stefano; Nandini-Weiss, Sri Durgesh; Bertassoli Junior, Dailson José; de Carvalho Campos, Marília; Mulitza, Stefan; Albuquerque, Ana Luiza Spadano; Bahr, André; Schefuß, Enno (2022): n-alkane carbon and hydrogen stable isotope data from sediment core M125-95-3 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.943713
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Abstract:
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.
Keyword(s):
Related to:
Ferreira, Jaqueline Q; Chiessi, Cristiano Mazur; Hirota, Marina; Oliveira, Rafael S; Prange, Matthias; Häggi, Christoph; Crivellari, Stefano; Nandini-Weiss, Sri Durgesh; Bertassoli Junior, Dailson José; Campos, Marília C; Mulitza, Stefan; Albuquerque, Ana Luiza Spadano; Bahr, André; Schefuß, Enno (2022): Changes in obliquity drive tree cover shifts in eastern tropical South America. Quaternary Science Reviews, 279, 107402, https://doi.org/10.1016/j.quascirev.2022.107402
Funding:
Coordenação de Aperfeicoamento de Pessoal de Nível Superior (CAPES), grant/award no. 88882.328049/2019-01
Coordenação de Aperfeicoamento de Pessoal de Nível Superior (CAPES), grant/award no. 88887.310301/2018-00: CAPES CLIMATE- PrInT grant
German Research Foundation (DFG), grant/award no. 390741603: EXC 2077: The Ocean Floor – Earth's Uncharted Interface
National Council for Scientific and Technological Development (CNPq), grant/award no. 429767/2018-8 and 302521/2017-8
Coverage:
Latitude: -10.945000 * Longitude: -36.205700
Date/Time Start: 2016-04-08T20:23:00 * Date/Time End: 2016-04-08T20:23:00
Minimum DEPTH, sediment/rock: 0.08 m * Maximum DEPTH, sediment/rock: 4.69 m
Event(s):
M125_469-3 (M125-95-3) * Latitude: -10.945000 * Longitude: -36.205700 * Date/Time: 2016-04-08T20:23:00 * Elevation: -1897.0 m * Location: South Atlantic Ocean * Campaign: M125 (SAMBA) * Basis: Meteor (1986) * Method/Device: Piston corer (PC)
Comment:
The dataset contains the corresponding depths and ages of each analyzed sample, long-chain (C29 and C31) n-alkane stable carbon (δ13C) and hydrogen (δD) isotope composition (ice volume corrected data), data standard deviation, the isotopic difference between homologs (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.
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
745 data points