Lateglacial and early Holocene glaciation in the tropical Andes caused by La Niña-like conditions

Zech, Jana; Zech, Roland; May, Jan-Hendrik; Kubik, Peter W.; Veit, Heinz (2010). Lateglacial and early Holocene glaciation in the tropical Andes caused by La Niña-like conditions. Palaeogeography, Palaeoclimatology, Palaeoecology, 293(1-2), pp. 248-254. Amsterdam: Elsevier 10.1016/j.palaeo.2010.05.026

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The response of the tropics to North Atlantic cold events, such as Heinrich Event I (H-I, ∼ 17–15 ka) and the Younger Dryas (YD, 12.7–11.5 ka), is still one of the most tantalizing, yet unresolved issues in paleoclimatology. The advent of surface exposure dating has therefore instigated the establishment of glacial chronologies in the tropical Andes to investigate potential climate teleconnections. Here, we present new exposure ages from the Cordillera Cochabamba (17°17′S), Bolivia, that reveal glacial advances during H-I and YD, as well as during the Early Holocene. Our chronology correlates well with cold sea surface temperatures in the eastern tropical Pacific, which indicates that La Niña-like conditions, i.e. forcings intrinsic to the tropics, played a key role for moisture advection and glaciation in the tropical Andes.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Biogeochemistry and Paleoclimate
08 Faculty of Science > Institute of Geography > Physical Geography > Unit Paleo-Geoecology
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Zech, Jana; Zech, Roland; May, Jan-Hendrik and Veit, Heinz

Subjects:

900 History > 910 Geography & travel

ISSN:

0031-0182

Publisher:

Elsevier

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:20

Last Modified:

10 Oct 2017 06:52

Publisher DOI:

10.1016/j.palaeo.2010.05.026

Web of Science ID:

000280007000021

BORIS DOI:

10.7892/boris.6511

URI:

https://boris.unibe.ch/id/eprint/6511 (FactScience: 211490)

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