South Atlantic Convergence Zone behavior over the mid to late-Holocene inferred from speleothem records

A new speleothem record  from the tropical Cerrado of Brazil (Angelica cave) is being processed for paleoclimatic reconstructions. ,using Uranium-Thorium (U/Th) dating for chronological constraints and oxygen isotopic values (δ18O) as a proxy for rainfall. The record is made of 18 U/Th dates and δ18O measurements across three stalagmite samples. 

Precipitation in central Brazil is dominantly influenced by the South Atlantic Convergence Zone (SACZ), a diagonal zone of deep convection extending from the eastern Amazon to southern Brazil and is a major component of the South American Monsoon System (SAMS). The project aims to reconstruct the paleoclimatic conditions during the Late Pleistocene and Holocene. 

Funding Sources: 

  • Startup Grant

Project Years: 

2019
2020
2021