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dc.contributor.author
Soto Rogel, Pamela
dc.contributor.author
Aravena, Juan Carlos
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Villalba, Ricardo
dc.contributor.author
Meier, Wolfgang Jens Henrik
dc.contributor.author
Grießinger, Jussi
dc.date.available
2024-03-18T10:34:19Z
dc.date.issued
2023-05
dc.identifier.citation
Soto Rogel, Pamela; Aravena, Juan Carlos; Villalba, Ricardo; Meier, Wolfgang Jens Henrik; Grießinger, Jussi; Tree-ring δ18Ocellulose variations in two Nothofagus species record large-scaleclimatic signals in the South American sector of the Southern Ocean; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 617; 5-2023; 1-12
dc.identifier.issn
0031-0182
dc.identifier.uri
http://hdl.handle.net/11336/230722
dc.description.abstract
In recent decades, southernmost South America (50–56° S) has experienced marked climate change (regional warming, decreased precipitation, reduced snow cover, and increased frequency of heat waves) related to variations in atmospheric circulation over varied timescales. In this paper, we develop oxygen isotopes from tree-ring cellulose (δ18OTRC) as a proxy for climate and atmospheric circulation in order to extend the regional meteorological record to deeper time intervals. Our work focuses on Nothofagus forests in two areas: (i) deciduous N. pumilio forest in the steppe transition zone near Punta Arenas and (ii) humid evergreen N. betuloides forest in the Navarino Island region. To investigate the potential for reconstructing palaeoclimate, δ18OTRC variations were correlated with local climate parameters as well as regional (Amundsen Sea Low, ASL) and hemispheric (Antarctic Oscillation, AAO) atmospheric circulation modes for the last 60 years. N. betuloides δ18OTRC variations show an overall positive trend, indicating isotopic enrichment over the study period, whereas no trend is recorded for the N. pumilio record. The strongest relationships with climate, together with the widest spatial representativeness, occur in the N. betuloides chronology during the growing season (spring to austral summer) and extend spatially from mid to high latitudes. In contrast, the sensitivity of the records is limited to summer months, and spatial correlations are much more limited. In addition, the N. betuloides record shows greater potential for reconstructing local climate features such as soil water (r = − 0.76), wind speed (r = 0.69), and precipitation (r = − 0.66), as well as regional (ASL, r = − 0.80) and hemispheric (AAO, r = 0.77) patterns of extratropical atmospheric circulation. Overall, we conclude that the N. betuloides record represents the most valuable tree-ring climate proxy for southernmost South America over past centuries.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AMUNDSEN SEA LOW (ASL)
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ANTARCTIC OSCILLATION (AAO)
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NOTHOFAGUS BETULOIDES
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NOTHOFAGUS PUMILIO
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SOUTHERNMOST SOUTH AMERICA (SSA)
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TREE-RING Δ18O
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Investigación Climatológica
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Tree-ring δ18Ocellulose variations in two Nothofagus species record large-scaleclimatic signals in the South American sector of the Southern Ocean
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-03-13T15:23:54Z
dc.journal.volume
617
dc.journal.pagination
1-12
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Soto Rogel, Pamela. Universidad de Magallanes; Chile. Universitat Erlangen-Nuremberg; Alemania
dc.description.fil
Fil: Aravena, Juan Carlos. Universidad de Magallanes; Chile
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Fil: Villalba, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Meier, Wolfgang Jens Henrik. Universitat Erlangen-Nuremberg; Alemania
dc.description.fil
Fil: Grießinger, Jussi. Universitat Erlangen-Nuremberg; Alemania
dc.journal.title
Palaeogeography, Palaeoclimatology, Palaeoecology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.palaeo.2023.111474
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