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Úbeda Palenque, José
Bonshoms, Martí
Iparraguirre, Joshua
Sáez, Lucía
De la Fuente, Ramón
Janssen, Lila
Concha Niño de Guzmán, Ronald Fernando
Vásquez Choque, Estibene Pool
Masías Alvarez, Pablo Jorge
Cordillera Occidental
Andes Centrales
Castilla
Condesuyos
Arequipa
Perú
Nevado Coropuna
2018-10-19T22:37:53Z
2018-10-19T22:37:53Z
2018-08
Úbeda, J.; Bonshoms, M.; Iparraguirre, J.; Sáez, L.; De la Fuente, R., Janssen, L., ... & Masías, P. (2018). Prospecting glacial ages and paleoclimatic reconstructions northeastward of nevado Coropuna (16° S, 73° W, 6377 m), arid tropical Andes. Geosciences, 8(8), 307. Doi: 10.3390/geosciences8080307.
http://repositorio.ingemmet.gob.pe/handle/ingemmet/1874
This work investigates the timing, paleoclimatic framework and inter-hemispheric teleconnections inferred from the glaciers last maximum extension and the deglaciation onset in the Arid Tropical Andes. A study area was selected to the northeastward of the Nevado Coropuna, the volcano currently covered by the largest tropical glacier on Earth. The current glacier extent, the moraines deposited in the past and paleoglaciers at their maximum extension have been mapped. The present and past Equilibrium Line Altitudes (ELA and paleoELA) have been reconstructed and the chlorine-36 ages have been calculated, for preliminary absolute dating of glacial and volcanic processes. The paleoELA depression, the thermometers installed in the study area and the accumulation data previously published allowed development of paleotemperature and paleoprecipitation models. The Coropuna glaciers were in maximum extension (or glacial standstill) ~20–12 ka ago (and maybe earlier). This last maximum extension was contemporary to the Heinrich 2–1 and Younger Dryas events and the Tauca and Coipasa paleolake transgressions on Bolivian Altiplano. The maximum paleoELA depression (991 m) shows a colder (-6.4 °C) and moister climate with precipitation ×1.2–×2.8 higher than the present. The deglaciation onset in the Arid Tropical Andes was 15–11 ka ago, earlier in the most southern, arid, and low mountains and later in the northernmost, less arid, and higher mountains.
application/pdf
eng
MDPI
Geosciences, vol.8, n.8, 2018
info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/4.0/
Instituto Geológico, Minero y Metalúrgico – INGEMMET
Repositorio Institucional INGEMMET
Glaciares
Geocronología
Glaciación
Glaciología
Desglaciación
Paleoclima
Paleoglaciares
Zonas tropicales
Volcanes
Arid Tropical Andes
Cosmogenic dating
Paleoclimatic reconstructions
Prospecting glacial ages and paleoclimatic reconstructions northeastward of nevado Coropuna (16° S, 73° W, 6377 m), arid tropical Andes
info:eu-repo/semantics/article
10.3390/geosciences8080307
Geología
Geosciences
Peer reviewed
Suiza
http://dx.doi.org/10.3390/geosciences8080307

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