under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and
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...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.382.5390 2023-05-15T17:33:19+02:00 under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and R. Zech Ch. Kull P. W. Kubik H. Veit The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.5390 http://hal.archives-ouvertes.fr/docs/00/29/80/93/PDF/cp-3-623-2007.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.5390 http://hal.archives-ouvertes.fr/docs/00/29/80/93/PDF/cp-3-623-2007.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.archives-ouvertes.fr/docs/00/29/80/93/PDF/cp-3-623-2007.pdf text 2007 ftciteseerx 2016-09-18T00:26:19Z 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 recalculated 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. 1 Text North Atlantic Unknown |
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ftciteseerx |
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English |
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 recalculated 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. 1 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
R. Zech Ch. Kull P. W. Kubik H. Veit |
spellingShingle |
R. Zech Ch. Kull P. W. Kubik H. Veit under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and |
author_facet |
R. Zech Ch. Kull P. W. Kubik H. Veit |
author_sort |
R. Zech |
title |
under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and |
title_short |
under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and |
title_full |
under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and |
title_fullStr |
under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and |
title_full_unstemmed |
under a Creative Commons License. Climate of the Past LGM and Late Glacial glacier advances in the Cordillera Real and |
title_sort |
under a creative commons license. climate of the past lgm and late glacial glacier advances in the cordillera real and |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.5390 http://hal.archives-ouvertes.fr/docs/00/29/80/93/PDF/cp-3-623-2007.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://hal.archives-ouvertes.fr/docs/00/29/80/93/PDF/cp-3-623-2007.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.382.5390 http://hal.archives-ouvertes.fr/docs/00/29/80/93/PDF/cp-3-623-2007.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766131789182533632 |