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Bertassoli Junior, Dailson José; Sawakuchi, André Oliveira; Chiessi, Cristiano Mazur; Schefuß, Enno; Hartmann, Gelvam André; Häggi, Christoph; Zabel, Matthias; McGlue, Michael M; Santos, Rudney A; Pupim, Fabiano Nascimento (2019): Organic and inorganic geochemical data of sediment cores XC-03 and XC-01-2, Xingu River, Amazon Basin [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.906264, Supplement to: Bertassoli Junior, Dailson José; Sawakuchi, André Oliveira; Chiessi, Cristiano Mazur; Schefuß, Enno; Hartmann, Gelvam André; Häggi, Christoph; da Cruz Junior, Francisco William; Zabel, Matthias; McGlue, Michael M; Santos, Rudney A; Pupim, Fabiano Nascimento (2019): Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies. Geophysical Research Letters, 46(15), 9013-9022, https://doi.org/10.1029/2019GL082936

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Published: 2019-09-25 • DOI registered: 2019-10-25

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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.
Keyword(s):
Amazon; Compound-specific Isotopes; Late Holocene; Xingu River
Coverage:
Median Latitude: -2.354119 * Median Longitude: -52.241479 * South-bound Latitude: -3.214278 * West-bound Longitude: -52.280000 * North-bound Latitude: -1.709000 * East-bound Longitude: -52.190117
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Bertassoli Junior, DJ (2019): Magnetic susceptibility of sediment core XC-01-2. https://doi.org/10.1594/PANGAEA.906206
  2. Bertassoli Junior, DJ (2019): Major elements of sediment core XC-01-2. https://doi.org/10.1594/PANGAEA.906208
  3. Bertassoli Junior, DJ (2019): Organic geochemistry of sediment core XC-01-2. https://doi.org/10.1594/PANGAEA.906217
  4. Bertassoli Junior, DJ (2019): Grain size distribution of sediment core XC-03. https://doi.org/10.1594/PANGAEA.906216
  5. Bertassoli Junior, DJ (2019): Magnetic susceptibility of sediment core XC-03. https://doi.org/10.1594/PANGAEA.906207
  6. Bertassoli Junior, DJ (2019): Major elements of sediment core XC-03. https://doi.org/10.1594/PANGAEA.906213
  7. Bertassoli Junior, DJ (2019): Organic geochemistry of sediment core XC-03. https://doi.org/10.1594/PANGAEA.906218