10Be chronology of the Last Glacial Maximum and Termination in the Andes of central Chile: The record of the Universidad Glacier (34° S)

Simple item page
dc.article.number108968
dc.catalogadorpva
dc.contributor.authorFernández Navarro, Hans Andrés
dc.contributor.authorGarcía B., Juan Luis
dc.contributor.authorNussbaumer, Samuel U.
dc.contributor.authorTikhomirov, Dmitry
dc.contributor.authorPérez Mora, Francia Débora
dc.contributor.authorGartner Roer, Isabelle
dc.contributor.authorChristl, Marcus
dc.contributor.authorEgli, Markus
dc.date.accessioned2025-01-06T20:26:10Z
dc.date.available2025-01-06T20:26:10Z
dc.date.issued2024
dc.description.abstractReconstructing mid-latitude glacier variations is a prerequisite for unveiling the interhemispheric climate linkages and atmospheric-ocean forcings that triggered those changes during the last glacial cycle. Nonetheless, the timing, magnitude, and structure of glacier fluctuations in the southern mid-latitudes remain incomplete. Here, we present a new Be-10 chronology of the Universidad Glacier in the Andes of central Chile (34 degrees S, 70 degrees W; similar to 2500 m a.s.l.) based on 21 cosmogenic-exposure ages of boulders on discrete moraine ridges defining former ice margins. Our findings include the mapping and dating of three moraines, UNI I, UNI II, and UNI III, located similar to 20 km, 15 km, and 10 km down-valley from the present-day glacier front, respectively. The Be-10 exposure ages of the UNI I moraine range from 135.9 +/- 7.1 to 51.4 +/- 2.7 ka (n = 3). The UNI II moraine gave a mean age of 18.0 +/- 0.9 (n = 15) and the UNI III moraine yielded a mean age of 13.9 +/- 0.8 ka (n = 3). The UNI I moraine implies the largest ice extent during a pre-Last Glacial Maximum (pre-LGM) period, including the penultimate glaciation. The UNI II is a moraine complex that represents cold and humid conditions in central Chile at the end of the LGM, which we attribute to the northward-shift of the Southern Westerly Winds (SWW). The UNI III moraine represents a return to glacial conditions interrupting the Termination, evidencing both a double-step deglacial trend observed through the southern middle and high latitudes at the end of the last ice age. The Andes at this subtropical latitude record a global signal of glacial and climate change.
dc.format.extent17 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.quascirev.2024.108968
dc.identifier.eissn1873-457X
dc.identifier.issn0277-3791
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2024.108968
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89533
dc.identifier.wosidWOS:001327809200001
dc.information.autorucInstituto de Geografía; Fernández Navarro, Hans Andrés; S/I; 1049886
dc.information.autorucInstituto de Geografía; García B., Juan Luis; 0000-0002-9028-7572; 9823
dc.information.autorucInstituto de Historia; Pérez Mora, Francia Débora; S/I; 1085970
dc.language.isoen
dc.nota.accesocontenido parcial
dc.publisherElsevier Ltd.
dc.revistaQuaternary Science Reviews
dc.rightsacceso restringido
dc.subjectGlaciation
dc.subjectGlacial geomorphology
dc.subject10Be exposure dating
dc.subjectSouthern south America
dc.subjectSouthern Westerly Winds
dc.subject.ddc900
dc.subject.deweyHistoria y geografíaes_ES
dc.subject.ods13 Climate action
dc.subject.odspa13 Acción por el clima
dc.title10Be chronology of the Last Glacial Maximum and Termination in the Andes of central Chile: The record of the Universidad Glacier (34° S)
dc.typeartículo
dc.volumen344
sipa.codpersvinculados1049886
sipa.codpersvinculados9823
sipa.codpersvinculados1085970
sipa.trazabilidadWOS;2024-10-19
sipa.trazabilidadORCID;2025-01-06
Files
Collections
Artículos de revistas