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dc.contributor.author
Zech, Roland
dc.contributor.author
Kull, Christoph
dc.contributor.author
Kubik, Peter W.
dc.contributor.author
Veit, Heinz
dc.date.accessioned
2019-06-25T09:59:36Z
dc.date.available
2017-06-08T18:15:45Z
dc.date.available
2019-06-25T09:59:36Z
dc.date.issued
2007
dc.identifier.issn
1814-9324
dc.identifier.issn
1814-9332
dc.identifier.other
10.5194/cp-3-623-2007
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/8656
dc.identifier.doi
10.3929/ethz-b-000008656
dc.description.abstract
Surface exposure dating (SED) is an innovative tool already being widely applied for moraine dating and for Late Quaternary glacier and climate reconstruction. Here we present exposure ages of 28 boulders from the Cordillera Real and the Cordillera Cochabamba, Bolivia. Our results indicate that the local Last Glacial Maximum (LGM) in the Eastern Cordilleras occurred at ~22–25 ka and was thus synchronous to the global temperature minimum. We were also able to date several Late Glacial moraines to ~11–13 ka, which likely document lower temperatures and increased precipitation ("Coipasa" humid phase). Additionally, we recognize the existence of older Late Glacial moraines re-calculated to ~15 ka from published cosmogenic nuclide data. Those may coincide with the cold Heinrich 1 event in the North Atlantic region and the pronounced "Tauca" humid phase. We conclude that (i) exposure ages in the tropical Andes may have been overestimated so far due to methodological uncertainties, and (ii) although precipitation plays an important role for glacier mass balances in the tropical Andes, it becomes the dominant forcing for glaciation only in the drier and thus more precipitation-sensitive regions farther west and south.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-sa/2.5/
dc.title
LGM and Late Glacial glacier advances in the Cordillera Real and Cochabamba (Bolivia) deduced from 10Be surface exposure dating
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Generic
dc.date.published
2007-10-26
ethz.journal.title
Climate of the Past
ethz.journal.volume
3
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
Clim. past
ethz.pages.start
623
en_US
ethz.pages.end
635
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.nebis
005583758
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
08608 - Prof. M. Suter
en_US
ethz.leitzahl.certified
08608 - Prof. M. Suter
ethz.date.deposited
2017-06-08T18:15:51Z
ethz.source
ECIT
ethz.identifier.importid
imp59364bcbadd5861843
ethz.ecitpid
pub:19443
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-19T08:24:04Z
ethz.rosetta.lastUpdated
2019-06-25T09:59:56Z
ethz.rosetta.versionExported
true
ethz.COinS
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