Holocene History of Río Tranquilo Glacier, Monte San Lorenzo (47°S), Central Patagonia

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dc.catalogadorjca
dc.contributor.authorSagredo T., Esteban
dc.contributor.authorReynhout, Scott A.
dc.contributor.authorKaplan, Michael R.
dc.contributor.authorAravena, Juan C.
dc.contributor.authorAraya, Paola S.
dc.contributor.authorLuckman, Brian H.
dc.contributor.authorSchwartz, Roseanne
dc.contributor.authorSchaefer, Joerg M. Sagredo T., Esteban
dc.contributor.authorReynhout, Scott A.
dc.contributor.authorKaplan, Michael R.
dc.contributor.authorAravena, Juan C.
dc.contributor.authorAraya, Paola S.
dc.contributor.authorLuckman, Brian H.
dc.contributor.authorSchwartz, Roseanne
dc.contributor.authorSchaefer, Joerg M.
dc.date.accessioned2023-05-12T15:36:59Z
dc.date.available2023-05-12T15:36:59Z
dc.date.issued2021
dc.description.abstractThe causes underlying Holocene glacier fluctuations remain elusive, despite decades of research efforts. Cosmogenic nuclide dating has allowed systematic study and thus improved knowledge of glacier-climate dynamics during this time frame, in part by filling in geographical gaps in both hemispheres. Here we present a new comprehensive Holocene moraine chronology from Mt. San Lorenzo (47°S) in central Patagonia, Southern Hemisphere. Twenty-four new 10Be ages, together with three published ages, indicate that the Río Tranquilo glacier approached its Holocene maximum position sometime, or possibly on multiple occasions, between 9,860 ± 180 and 6,730 ± 130 years. This event(s) was followed by a sequence of slightly smaller advances at 5,750 ± 220, 4,290 ± 100 (?), 3,490 ± 140, 1,440 ± 60, between 670 ± 20 and 430 ± 20, and at 390 ± 10 years ago. The Tranquilo record documents centennial to millennial-scale glacier advances throughout the Holocene, and is consistent with recent glacier chronologies from central and southern Patagonia. This pattern correlates well with that of multiple moraine-building events with slightly decreasing net extent, as is observed at other sites in the Southern Hemisphere (i.e., Patagonia, New Zealand and Antarctic Peninsula) throughout the early, middle and late Holocene. This is in stark contrast to the typical Holocene mountain glacier pattern in the Northern Hemisphere, as documented in the European Alps, Scandinavia and Canada, where small glaciers in the early-to-mid Holocene gave way to more-extensive glacier advances during the late Holocene, culminating in the Little Ice Age expansion. We posit that this past asymmetry between the Southern and Northern hemisphere glacier patterns is due to natural forcing that has been recently overwhelmed by anthropogenic greenhouse gas driven warming, which is causing interhemispherically synchronized glacier retreat unprecedented during the Holocene.
dc.fechaingreso.objetodigital2023-05-12
dc.fuente.origenORCID
dc.identifier.doi10.3389/feart.2021.813433
dc.identifier.eissn2095-0209
dc.identifier.issn2095-0195
dc.identifier.urihttps://doi.org/10.3389/feart.2021.813433
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/66972
dc.information.autorucInstituto de Geografía;Sagredo T., Esteban;0000-0002-4494-5423;16924
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final12
dc.pagina.inicio1
dc.revistaFrontiers in Earth Science
dc.rightsacceso abierto
dc.rights.licenseCreative Commons Attribution License (CC BY)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectPatagonia
dc.subjectHolocene
dc.subjectGlacier fluctuations
dc.subject10Be dating
dc.subjectSouthern Annular Mode
dc.subjectNeoglaciation
dc.subjectPaleoclimate
dc.subjectSouth America
dc.subject.ddc550
dc.subject.deweyCiencias de la tierraes_ES
dc.titleHolocene History of Río Tranquilo Glacier, Monte San Lorenzo (47°S), Central Patagonia
dc.typeartículo
dc.volumen9
sipa.codpersvinculados16924
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