Organic and inorganic geochemical data of sediment cores XC-03 and XC-01-2, Xingu River, Amazon Basin

doi:doi:10.1594/PANGAEA.906264

Organic and inorganic geochemical data of sediment cores XC-03 and XC-01-2, Xingu River, Amazon Basin

Late Holocene hydroclimate variations have been extensively recognized in Amazonia, but the effects of such changes on riverine discharge within the Amazon lowlands are still poorly understood. We investigated a sediment core covering circa 4,000 to 300 cal yr BP collected in the lower valley of the Xingu River (Xingu Ria) in an area under the influence of the Amazon River. Our results indicate a decrease in precipitation in the Amazon lowlands throughout the studied period and reduced input of coarser and potassium‐rich Amazon River sediments to the confluence from about 2,600 to 1,400 cal yr BP. We suggest that lower temperatures in the extratropical Southern Hemisphere weakened the South American Summer Monsoon and led to a decrease in the water discharge of the Amazon River during this period.

BibTex:

@dataset{Bertassoli_Junior_Dailson_José_and_Sawakuchi_André_Oliveira_and_Chiessi_Cristiano_Mazur_and_Schefuß_Enno_and_Hartmann_Gelvam_André_and_Häggi_Christoph_and_Zabel_Matthias_and_McGlue_Michael_M_and_Santos_Rudney_A_and_Pupim_Fabiano_Nascimento_2019,
    abstract = {Late Holocene hydroclimate variations have been extensively recognized in Amazonia, but the effects of such changes on riverine discharge within the Amazon lowlands are still poorly understood. We investigated a sediment core covering circa 4,000 to 300 cal yr BP collected in the lower valley of the Xingu River (Xingu Ria) in an area under the influence of the Amazon River. Our results indicate a decrease in precipitation in the Amazon lowlands throughout the studied period and reduced input of coarser and potassium‐rich Amazon River sediments to the confluence from about 2,600 to 1,400 cal yr BP. We suggest that lower temperatures in the extratropical Southern Hemisphere weakened the South American Summer Monsoon and led to a decrease in the water discharge of the Amazon River during this period.},
    author = {Bertassoli Junior, Dailson José and Sawakuchi, André Oliveira and Chiessi, Cristiano Mazur and Schefuß, Enno and Hartmann, Gelvam André and Häggi, Christoph and Zabel, Matthias and McGlue, Michael M and Santos, Rudney A and Pupim, Fabiano Nascimento},
    doi = {10.1594/PANGAEA.906264},
    institution = {PANGAEA (Lithosphere)},
    keyword = {'Amazon', 'Compound', 'Late Holocene', 'Xingu River', 'specific Isotopes'},
    title = {Organic and inorganic geochemical data of sediment cores XC-03 and XC-01-2, Xingu River, Amazon Basin},
    url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-906264},
    year = {2019}
}