Late glacial climate evolution in the Patagonian Andes (44–47° S) from alpine glacier modelling

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dc.article.number108035
dc.catalogadorjca
dc.contributor.authorMuir, Ruby
dc.contributor.authorEaves, Shaun
dc.contributor.authorVargo, Lauren
dc.contributor.authorAnderson, Brian
dc.contributor.authorMackintosh, Andrew
dc.contributor.authorSagredo T., Esteban
dc.contributor.authorSoteres García, Rodrigo LeónMuir, Ruby
dc.contributor.authorEaves, Shaun
dc.contributor.authorVargo, Lauren
dc.contributor.authorAnderson, Brian
dc.contributor.authorMackintosh, Andrew
dc.contributor.authorSagredo T., Esteban
dc.contributor.authorSoteres García, Rodrigo León
dc.date.accessioned2023-05-12T15:36:59Z
dc.date.available2023-05-12T15:36:59Z
dc.date.issued2023
dc.description.abstractNumerical glacier models applied to moraine chronologies provide an opportunity to quantify past climate change. Here we apply a two-dimensional coupled mass balance – ice flow model to well-dated moraine sequences deposited by former alpine glaciers at two central Patagonian sites: Cerro Riñón (43.97°S, 71.64°W) and Río Tranquilo (47.50°S, 72.38°W), to reconstruct the local temperatures during both the Antarctic Cold Reversal (14.7–13 ka) and the Younger Dryas (12.9–11 ka). Modelled temperature anomalies during the Antarctic Cold Reversal are −2.6 ± 0.4 °C at 44°S, and −2.9 ± 0.6 °C at 47°S. At both locations this cold event is followed by temperature increases of +0.6–0.7 °C or precipitation reductions of c. 20% to drive glacier retreat to moraines deposited during Younger Dryas time. The consistent climatic anomalies between these two latitudes suggest this region of Patagonia was responding to a common climatic event. Further, the late-glacial temperature anomalies found here compare well to those determined by similar glacier modelling techniques in New Zealand, at 43–44° S. These results support a trans-Pacific response throughout the southern mid to high latitudes (43–47° S) during the ACR that is best explained by a northward expansion of the south westerly winds.
dc.fechaingreso.objetodigital2023-05-12
dc.fuente.origenORCID
dc.identifier.doi10.1016/j.quascirev.2023.108035
dc.identifier.eissn1873-457X
dc.identifier.issn0277-3791
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2023.108035
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0277379123000835
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66973
dc.information.autorucInstituto de Geografía;Sagredo T., Esteban;0000-0002-4494-5423;16924
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final17
dc.pagina.inicio1
dc.revistaQuaternary Science Reviews
dc.rightsacceso abierto
dc.subjectDeglacial
dc.subjectGlaciology
dc.subjectPaleoclimatology
dc.subjectSouth America
dc.subjectGlacial modelling
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.titleLate glacial climate evolution in the Patagonian Andes (44–47° S) from alpine glacier modelling
dc.typeartículo
dc.volumen305
sipa.codpersvinculados16924
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