Environmental variability of the last 1600 years derived from a multiproxy lake record of the east Andean margin (46.7°S), central west Patagonia, Chile

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dc.article.number109392
dc.catalogadorgjm
dc.contributor.authorFranco, Carolina
dc.contributor.authorMaldonado, Antonio
dc.contributor.authorOhlendorf, Christian
dc.contributor.authorGebhardt, A. Catalina
dc.contributor.authorPorras, M. Eugenia de
dc.contributor.authorNuevo-Delaunay, Amalia
dc.contributor.authorMéndez, César
dc.contributor.authorVogt, Christoph
dc.contributor.authorZolitschka, Bernd
dc.date.accessioned2025-10-30T14:46:47Z
dc.date.available2025-10-30T14:46:47Z
dc.date.issued2025
dc.description.abstractCentral west Patagonia is directly exposed to influence of the Southern Westerly Winds (SWW). Its position relative to the core of this major wind system makes this region highly susceptible to magnitude and latitudinal changes of the SWW. Moreover, the pronounced topography defines a strong west-east moisture gradient. We present an environmental reconstruction derived from sediments of Laguna Vogt, a lake located in one of the easternmost valleys of central west Patagonia. Our reconstruction shows that increased runoff triggered the remobilization of basaltic material, while lacustrine production remained low between 1600-1300 and 1000-750 cal yr BP. Between 1300-1000 and 750-250 cal yr BP, these conditions changed to decreased surface runoff, with less clastic input favoring high autochthonous sedimentation, while several episodes of flooding occurred. Our findings indicate that intervals of enhanced runoff at Laguna Vogt correlate with a regional period of increased precipitation, which started to decline around 800 cal yr BP. Climate reconstructions suggest that increased precipitation was a direct result of intensified SWW. Thus, periods of high lacustrine productivity interspersed with episodes of intense flooding are interpreted as shifts between wet-cold and dry-warm conditions occurring on decadal to multidecadal timescales. Around 250 cal yr BP, fluvial detrital input into the lake became dominant, suggesting the establishment of wetter conditions. This increase in precipitation, also documented by other sediment records from central west Patagonia, is associated with intensified SWW. Such a timing compares well with multiple regional glacial advances, indicating an environmental shift likely associated to the last glacial stage of the Holocene.
dc.description.funderDAAD
dc.description.funderAgencia Nacional de Investigación y Desarrollo
dc.description.funderMinistry of Science, Chile
dc.description.funderMeseta Chile Chico
dc.description.funderQuaternary Research Association
dc.description.funderUniversity of Bremen
dc.description.funderCorporación Nacional Forestal
dc.description.funderANID FONDECYT
dc.fechaingreso.objetodigital2025-10-30
dc.format.extent19 páginas
dc.fuente.origenSCOPUS
dc.identifier.doi10.1016/j.quascirev.2025.109392
dc.identifier.issn0277-3791
dc.identifier.scopusidSCOPUS_ID:105004557535
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2025.109392
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/106428
dc.identifier.wosidWOS:001490698000002
dc.information.autorucEscuela de Antropología; Méndez, César; S/I; 1360063
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaQuaternary Science Reviews
dc.rightsacceso abierto
dc.rights.licenseCC BY-NC-ND 4.0 Attribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectLake sediments
dc.subjectLate Holocene
dc.subjectLittle Ice Age
dc.subjectPaleoclimate
dc.subjectSouthern Westerly Winds
dc.subjectXRF core scanning
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.subject.ods06 Clean water and sanitation
dc.subject.ods13 Climate action
dc.subject.odspa06 Agua limpia y saneamiento
dc.subject.odspa13 Acción por el clima
dc.titleEnvironmental variability of the last 1600 years derived from a multiproxy lake record of the east Andean margin (46.7°S), central west Patagonia, Chile
dc.typeartículo
dc.volumen360
sipa.codpersvinculados1360063
sipa.trazabilidadSCOPUS;2025-05-18
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