Pollen, XRF, microcharcoal and mean air annual temperature of the CO3 and CO14 records, Colônia Basin, São Paulo-Brazil

DOI

We analysed changes in mean air annual temperature (MAAT), vegetation and biomass burning on a long and continuous lake-peat sediment record from the Colônia basin, southeastern Brazil, examining the responses of a wet tropical rainforest over the last 180 ka. Stronger southern atmospheric circulation up to the latitude of Colônia was found for the penultimate glacial with lower temperatures than during the last glacial, while strengthening of the South American summer monsoon (SASM) circulation started during the last interglacial and progressively enhanced a longer wet summer season from 95 ka until the present. Past MAAT variations and fire history were possibly modulated by eccentricity, although with signatures which differ in average and in amplitude between the last 180 ka. Vegetation responses were driven by the interplay between the SASM and southern circulation linked to Antarctic ice volume, inferred by the presence of a cool mixed evergreen forest from 180 to 45 ka progressively replaced by a rainforest. We report cooler temperatures during the marine isotope stage 3 (MIS 3: 57-29 ka) than during the Last Glacial Maximum (LGM: 23-19 ka). Our findings show that tropical forest dynamics display different patterns than mid-latitude during the last 180 ka.

Supplement to: Rodríguez-Zorro, Paula A; Ledru, Marie-Pierre; Bard, Edouard; Aquino-Alfonso, Olga; Camejo, Adriana; Daniau, Anne-Laure; Favier, Charly; García, Marta; Mineli, Thays D; Rostek, Frauke; Ricardi-Branco, Fresia; Sawakuchi, André Oliveira; Simon, Quentin; Tachikawa, Kazuyo; Thouveny, Nicolas (2020): Shut down of the South American summer monsoon during the penultimate glacial. Scientific Reports, 10(1)

Identifier
DOI https://doi.org/10.1594/PANGAEA.907731
Related Identifier IsSupplementTo https://doi.org/10.1038/s41598-020-62888-x
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.907731
Provenance
Creator Rodríguez-Zorro, Paula A ORCID logo; Ledru, Marie-Pierre ORCID logo; Bard, Edouard ORCID logo; Aquino-Alfonso, Olga; Camejo, Adriana; Daniau, Anne-Laure ORCID logo; Favier, Charly ORCID logo; García, Marta; Mineli, Thays D; Rostek, Frauke; Ricardi-Branco, Fresia; Oliveira Sawakuchi, André; Simon, Quentin ORCID logo; Tachikawa, Kazuyo ORCID logo; Thouveny, Nicolas (ORCID: 0000-0001-6601-856X)
Publisher PANGAEA
Publication Year 2019
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 5 datasets
Discipline Earth System Research
Spatial Coverage (-46.707 LON, -23.867 LAT)