Glacier fluctuations in the northern Patagonian Andes (44°S) imply wind-modulated interhemispheric in-phase climate shifts during Termination 1

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dc.article.number10842
dc.catalogadorjca
dc.contributor.authorSoteres García, Rodrigo León
dc.contributor.authorSagredo T., Esteban
dc.contributor.authorKaplan, Michael R.
dc.contributor.authorMartini, Mateo A.
dc.contributor.authorMoreno, Patricio I.
dc.contributor.authorReynhout, Scott A.
dc.contributor.authorSchwartz, Roseanne
dc.contributor.authorSchaefer, Joerg M.Soteres García, Rodrigo León
dc.contributor.authorSagredo T., Esteban
dc.contributor.authorKaplan, Michael R.
dc.contributor.authorMartini, Mateo A.
dc.contributor.authorMoreno, Patricio I.
dc.contributor.authorReynhout, Scott A.
dc.contributor.authorSchwartz, Roseanne
dc.contributor.authorSchaefer, Joerg M.
dc.date.accessioned2023-05-12T15:36:58Z
dc.date.available2023-05-12T15:36:58Z
dc.date.issued2022
dc.description.abstractThe Last Glacial Termination (T1) featured major changes in global circulation systems that led to a shift from glacial to interglacial climate. While polar ice cores attest to an antiphased thermal pattern at millennial timescales, recent well-dated moraine records from both hemispheres suggest in-phase fluctuations in glaciers through T1, which is inconsistent with the bipolar see-saw paradigm. Here, we present a glacier chronology based on 30 new 10Be surface exposure ages from well-preserved moraines in the Lago Palena/General Vintter basin in northern Patagonia (~ 44°S). We find that the main glacier lobe underwent profound retreat after 19.7 ± 0.7 ka. This recessional trend led to the individualization of the Cerro Riñón glacier by ~ 16.3 ka, which underwent minor readvances at 15.9 ± 0.5 ka during Heinrich Stadial 1, during the Antarctic Cold Reversal with successive maxima at 13.5 ± 0.4, 13.1 ± 0.4, and 13.1 ± 0.5 ka, and a minor culmination at 12.5 ± 0.4 ka during Younger Dryas time. We conclude that fluctuations of Patagonian glaciers during T1 were controlled primarily by climate anomalies brought by shifts in the Southern Westerly Winds (SWW) locus. We posit that the global covariation of mountain glaciers during T1 was linked to variations in atmospheric CO2 (atmCO2) promoted by the interplay of the SWW-Southern Ocean system at millennial timescales.
dc.fechaingreso.objetodigital2023-05-12
dc.fuente.origenORCID
dc.identifier.doi10.1038/s41598-022-14921-4
dc.identifier.issn2332-2675
dc.identifier.urihttps://doi.org/10.1038/s41598-022-14921-4
dc.identifier.urihttps://www.nature.com/articles/s41598-022-14921-4
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66970
dc.information.autorucInstituto de Geografía;Soteres García, Rodrigo León;0000-0003-3647-5342;250269
dc.information.autorucInstituto de Geografía;Sagredo T., Esteban;0000-0002-4494-5423;16924
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final11
dc.pagina.inicio1
dc.revistaScientific Reports
dc.rightsacceso abierto
dc.subjectGeomorphology
dc.subjectPalaeoclimate
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.titleGlacier fluctuations in the northern Patagonian Andes (44°S) imply wind-modulated interhemispheric in-phase climate shifts during Termination 1
dc.typeartículo
dc.volumen12
sipa.codpersvinculados250269
sipa.codpersvinculados16924
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