South American monsoon response to iceberg discharge in the North Atlantic

Here, we present a precisely dated speleothem record of South American monsoon precipitation covering the period encompassed by the last six Heinrich Stadials. Our monsoon record allows us to determine the timing of regional hydroclimatic expression of Heinrich Stadials over tropical lowland South A...

Full description

Bibliographic Details
Published in:Proceedings of the National Academy of Sciences
Main Authors: Stríkis, Nicolás M., Cruz, Francisco W., Barreto, Eline A. S., Naughton, Filipa, Vuille, Mathias, Cheng, Hai, Voelker, Antje H. L., Zhang, Haiwei, Karmann, Ivo, Edwards, R. Lawrence, Auler, Augusto S., Santos, Roberto Ventura, Sales, Hamilton Reis
Format: Text
Language:English
Published: National Academy of Sciences 2018
Subjects:
Physical Sciences
North Atlantic
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5899446/
http://www.ncbi.nlm.nih.gov/pubmed/29581293
https://doi.org/10.1073/pnas.1717784115
Description
Summary:Here, we present a precisely dated speleothem record of South American monsoon precipitation covering the period encompassed by the last six Heinrich Stadials. Our monsoon record allows us to determine the timing of regional hydroclimatic expression of Heinrich Stadials over tropical lowland South America. By comparing our record with sea-surface temperature reconstructions from the subtropical North Atlantic, our results provide evidence connecting South American monsoon precipitation and methane release with the events of iceberg discharge depicted by the deposits of ice-rafted detritus. These results are relevant to climate modelers and paleoclimatologists interested in abrupt climate change, tropical–extratropical climate teleconnections, and paleo-reconstructions of the monsoon and the tropical hydrologic cycle.

Similar Items