Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies

D. J. Bertassoli, A. O. Sawakuchi, C. M. Chiessi, E. Schefuß, G. A. Hartmann, C. Häggi, F. W. Cruz, M. Zabel, M. M. McGlue, R. A. Santos, F. N. Pupim

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

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.

Original languageEnglish
Pages (from-to)9013-9022
Number of pages10
JournalGeophysical Research Letters
Volume46
Issue number15
DOIs
StatePublished - Aug 16 2019

Bibliographical note

Publisher Copyright:
©2019. American Geophysical Union. All Rights Reserved.

Keywords

  • Amazon
  • Amazonia
  • Holocene
  • SASM
  • late Holocene
  • paleoclimate

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences

Fingerprint

Dive into the research topics of 'Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies'. Together they form a unique fingerprint.

Cite this