Shut down of the South American summer monsoon during the penultimate glacial
We analysed changes in mean annual air 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 circulati...
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/189128 2024-04-28T07:58:38+00:00 Shut down of the South American summer monsoon during the penultimate glacial RODRÍGUEZ-ZORRO, Paula LEDRU, Marie-Pierre BARD, Edouard AQUINO-ALFONSO, Olga CAMEJO, Adriana DANIAU, Anne-Laure FAVIER, Charly GARCIA, Marta MINELI, Thays ROSTEK, Frauke RICARDI-BRANCO, Fresia SAWAKUCHI, André Oliveira SIMON, Quentin TACHIKAWA, K. THOUVENY, Nicolas 2020-04-15 https://oskar-bordeaux.fr/handle/20.500.12278/189128 https://hdl.handle.net/20.500.12278/189128 https://doi.org/10.1038/s41598-020-62888-x EN eng 2045-2322 https://oskar-bordeaux.fr/handle/20.500.12278/189128 doi:10.1038/s41598-020-62888-x open CC BY Planète et Univers [physics]/Sciences de la Terre/Climatologie Sciences de l'environnement/Milieux et Changements globaux Article de revue 2020 ftoskarbordeaux https://doi.org/20.500.12278/18912810.1038/s41598-020-62888-x 2024-04-08T14:49:30Z We analysed changes in mean annual air 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. Article in Journal/Newspaper Antarc* Antarctic OSKAR Bordeaux (Open Science Knowledge ARchive) Scientific Reports 10 1 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Planète et Univers [physics]/Sciences de la Terre/Climatologie Sciences de l'environnement/Milieux et Changements globaux |
spellingShingle |
Planète et Univers [physics]/Sciences de la Terre/Climatologie Sciences de l'environnement/Milieux et Changements globaux RODRÍGUEZ-ZORRO, Paula LEDRU, Marie-Pierre BARD, Edouard AQUINO-ALFONSO, Olga CAMEJO, Adriana DANIAU, Anne-Laure FAVIER, Charly GARCIA, Marta MINELI, Thays ROSTEK, Frauke RICARDI-BRANCO, Fresia SAWAKUCHI, André Oliveira SIMON, Quentin TACHIKAWA, K. THOUVENY, Nicolas Shut down of the South American summer monsoon during the penultimate glacial |
topic_facet |
Planète et Univers [physics]/Sciences de la Terre/Climatologie Sciences de l'environnement/Milieux et Changements globaux |
description |
We analysed changes in mean annual air 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. |
format |
Article in Journal/Newspaper |
author |
RODRÍGUEZ-ZORRO, Paula LEDRU, Marie-Pierre BARD, Edouard AQUINO-ALFONSO, Olga CAMEJO, Adriana DANIAU, Anne-Laure FAVIER, Charly GARCIA, Marta MINELI, Thays ROSTEK, Frauke RICARDI-BRANCO, Fresia SAWAKUCHI, André Oliveira SIMON, Quentin TACHIKAWA, K. THOUVENY, Nicolas |
author_facet |
RODRÍGUEZ-ZORRO, Paula LEDRU, Marie-Pierre BARD, Edouard AQUINO-ALFONSO, Olga CAMEJO, Adriana DANIAU, Anne-Laure FAVIER, Charly GARCIA, Marta MINELI, Thays ROSTEK, Frauke RICARDI-BRANCO, Fresia SAWAKUCHI, André Oliveira SIMON, Quentin TACHIKAWA, K. THOUVENY, Nicolas |
author_sort |
RODRÍGUEZ-ZORRO, Paula |
title |
Shut down of the South American summer monsoon during the penultimate glacial |
title_short |
Shut down of the South American summer monsoon during the penultimate glacial |
title_full |
Shut down of the South American summer monsoon during the penultimate glacial |
title_fullStr |
Shut down of the South American summer monsoon during the penultimate glacial |
title_full_unstemmed |
Shut down of the South American summer monsoon during the penultimate glacial |
title_sort |
shut down of the south american summer monsoon during the penultimate glacial |
publishDate |
2020 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/189128 https://hdl.handle.net/20.500.12278/189128 https://doi.org/10.1038/s41598-020-62888-x |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
2045-2322 https://oskar-bordeaux.fr/handle/20.500.12278/189128 doi:10.1038/s41598-020-62888-x |
op_rights |
open CC BY |
op_doi |
https://doi.org/20.500.12278/18912810.1038/s41598-020-62888-x |
container_title |
Scientific Reports |
container_volume |
10 |
container_issue |
1 |
_version_ |
1797570729901817856 |