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dc.contributor.author
Lücke, Andreas
dc.contributor.author
Kock, Sebastian T.
dc.contributor.author
Wissel, Holger
dc.contributor.author
Kulemeyer, Julio José
dc.contributor.author
Lupo, Liliana Concepcion
dc.contributor.author
Schäbitz, Frank
dc.contributor.author
Schittek, Karsten
dc.date.available
2023-09-11T13:34:09Z
dc.date.issued
2022-11
dc.identifier.citation
Lücke, Andreas; Kock, Sebastian T.; Wissel, Holger; Kulemeyer, Julio José; Lupo, Liliana Concepcion; et al.; Hydroclimatic record from an Altiplano cushion peatland (24˚S) indicates large-scale reorganisation of atmospheric circulation for the late Holocene; Public Library of Science; Plos One; 17; 11; 11-2022; 1-26
dc.identifier.issn
1932-6203
dc.identifier.uri
http://hdl.handle.net/11336/211064
dc.description.abstract
The hydroclimate of South America is characterized by the South American summer monsoon (SASM), a tropical atmospheric circulation that induces a summer precipitation regime, and the Southern Hemisphere Westerlies (SHW), an extratropical atmospheric circulation that induces a winter precipitation regime. Stretched between these two systems is a NW-SE-oriented region dominated by descending air masses, resulting in the South American subtropical dry zone (SASDZ), also known as the arid diagonal. We investigated the Cerro Tuzgle cushion peatland (CTP) located on the Argentine Altiplano, north of the present-day SASDZ. Previous work revealed that the CTP was consistently in the SASM regime during the last 2900 cal yr BP. Here, we extend the CTP record to the middle Holocene covering the last 7200 cal yr BP to gain further knowledge of the Holocene development of the SASM and potential modulations of the SASDZ. The prominent feature of the entire record is a distinct and lasting transition centred around 3100 cal yr BP characterized by declining minerogenic content, increasing organic carbon content, rising stable carbon isotope values of organic matter and cellulose, and increasing stable oxygen isotope values of cellulose. We interpret this specific proxy pattern as a hydroclimatic transition towards less arid conditions at the CTP after 3100 cal yr BP. The transition corresponds with the end of the continuous Holocene strengthening of the SASM between 3500 cal yr BP and 3000 cal yr BP indicated by proxy records from north and east of the CTP. The CTP does not reflect this strengthening of the SASM and rather exhibits a threshold response indicating the effective establishment of the SASM summer precipitation regime at 24˚S. This suggests that moisture supply during a more arid middle Holocene was provided by isotopically depleted precipitation, while moisture supply after the transition originated from isotopically enriched SASM summer precipitation. Concurrent hydroclimatic changes in the SHW winter precipitation regime south of the SASDZ are documented in a distinct lake level rise of Laguna Aculeo (33˚50´S) around 3200 cal yr BP. These coinciding hydrological changes of the SASM and the SHW precipitation regimes indicate larger scale reorganisations of atmospheric circulation components, potentially connected to major modulations of the SASDZ. Thus, our CTP record sheds light on the middle to late Holocene development of the SASM at its southern limit and corroborates connections between the tropical and extratropical hydroclimate of South America.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Public Library of Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
ALTIPLANO
dc.subject
PEATLAND
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LATE HOLOCENE
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HYDROCLIMATIC RECORD
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Geografía Física
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Hydroclimatic record from an Altiplano cushion peatland (24˚S) indicates large-scale reorganisation of atmospheric circulation for the late Holocene
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-07T19:50:59Z
dc.journal.volume
17
dc.journal.number
11
dc.journal.pagination
1-26
dc.journal.pais
Estados Unidos
dc.journal.ciudad
San Francisco
dc.description.fil
Fil: Lücke, Andreas. Universitat zu Köln; Alemania
dc.description.fil
Fil: Kock, Sebastian T.. Universitat zu Köln; Alemania
dc.description.fil
Fil: Wissel, Holger. Forschungszentrum; Alemania. Universitat zu Köln; Alemania
dc.description.fil
Fil: Kulemeyer, Julio José. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
dc.description.fil
Fil: Lupo, Liliana Concepcion. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
dc.description.fil
Fil: Schäbitz, Frank. Universitat zu Köln; Alemania
dc.description.fil
Fil: Schittek, Karsten. Universitat zu Köln; Alemania
dc.journal.title
Plos One
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0277027
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1371/journal.pone.0277027
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