Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3
The occurrence of pronounced climate reversals during the last glacial termination has long been recognised in palaeoclimate records from both hemispheres and from high to low latitudes. Accurate constraint of both the timing and magnitude of events, such as the Younger Dryas and Antarctic Cold Reve...
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ftnuigalway:oai:aran.library.nuigalway.ie/:10379/14781 2023-06-11T04:06:38+02:00 Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 Bromley, Gordon R. M. Hall, Brenda L. Schaefer, Joerg M. Winckler, Gisela Todd, Claire E. Rademaker, Kurt M. 2018-12-27T22:29:39Z application/pdf http://hdl.handle.net/10379/14781 https://doi.org/10.1002/jqs.1424 en eng Wiley Journal of Quaternary Science Bromley, Gordon R.M., Hall, Brenda L., Schaefer, Joerg M., Winckler, Gisela, Todd, Claire E., & Rademaker, Kurt M. (2011). Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic 3He. Journal of Quaternary Science, 26(1), 37-43. doi:10.1002/jqs.1424 0267-8179 1099-1417 http://hdl.handle.net/10379/14781 doi:10.1002/jqs.1424 Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ ANTARCTIC COLD REVERSAL SURFACE EXPOSURE AGES YOUNGER DRYAS CORDILLERA BLANCA PRODUCTION-RATES TROPICAL ANDES NEW-ZEALAND ICE-CORE HOLOCENE CLIMATE Article 2018 ftnuigalway https://doi.org/10.1002/jqs.1424 2023-05-28T18:06:11Z The occurrence of pronounced climate reversals during the last glacial termination has long been recognised in palaeoclimate records from both hemispheres and from high to low latitudes. Accurate constraint of both the timing and magnitude of events, such as the Younger Dryas and Antarctic Cold Reversal, is vital in order to test different hypotheses for the causes and propagation of abrupt climate change. However, in contrast to higher-latitude regions, well-dated records from the Tropics are rare and the structure of late-glacial tropical climate remains uncertain. As a step toward addressing this problem, we present an in situ cosmogenic He-3 surface exposure chronology from Nevado Coropuna, southern Peru, documenting a significant fluctuation of the ice margin during the late-glacial period. Ten tightly clustered ages from a pair of moraines located halfway between the modern glacier and the Last Glacial Maximum terminus range from 11.9 to 13.9 ka and give an arithmetic mean age of 12.8 +/- 0.7 ka (1 sigma). These data constitute direct evidence for a readvance, or prolonged stillstand, of glaciers in the arid Andes of southwestern Peru. Copyright (C) 2011 John Wiley & Sons, Ltd. peer-reviewed Article in Journal/Newspaper Antarc* Antarctic ice core National University of Ireland (NUI), Galway: ARAN Antarctic New Zealand Journal of Quaternary Science 26 1 37 43 |
institution |
Open Polar |
collection |
National University of Ireland (NUI), Galway: ARAN |
op_collection_id |
ftnuigalway |
language |
English |
topic |
ANTARCTIC COLD REVERSAL SURFACE EXPOSURE AGES YOUNGER DRYAS CORDILLERA BLANCA PRODUCTION-RATES TROPICAL ANDES NEW-ZEALAND ICE-CORE HOLOCENE CLIMATE |
spellingShingle |
ANTARCTIC COLD REVERSAL SURFACE EXPOSURE AGES YOUNGER DRYAS CORDILLERA BLANCA PRODUCTION-RATES TROPICAL ANDES NEW-ZEALAND ICE-CORE HOLOCENE CLIMATE Bromley, Gordon R. M. Hall, Brenda L. Schaefer, Joerg M. Winckler, Gisela Todd, Claire E. Rademaker, Kurt M. Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 |
topic_facet |
ANTARCTIC COLD REVERSAL SURFACE EXPOSURE AGES YOUNGER DRYAS CORDILLERA BLANCA PRODUCTION-RATES TROPICAL ANDES NEW-ZEALAND ICE-CORE HOLOCENE CLIMATE |
description |
The occurrence of pronounced climate reversals during the last glacial termination has long been recognised in palaeoclimate records from both hemispheres and from high to low latitudes. Accurate constraint of both the timing and magnitude of events, such as the Younger Dryas and Antarctic Cold Reversal, is vital in order to test different hypotheses for the causes and propagation of abrupt climate change. However, in contrast to higher-latitude regions, well-dated records from the Tropics are rare and the structure of late-glacial tropical climate remains uncertain. As a step toward addressing this problem, we present an in situ cosmogenic He-3 surface exposure chronology from Nevado Coropuna, southern Peru, documenting a significant fluctuation of the ice margin during the late-glacial period. Ten tightly clustered ages from a pair of moraines located halfway between the modern glacier and the Last Glacial Maximum terminus range from 11.9 to 13.9 ka and give an arithmetic mean age of 12.8 +/- 0.7 ka (1 sigma). These data constitute direct evidence for a readvance, or prolonged stillstand, of glaciers in the arid Andes of southwestern Peru. Copyright (C) 2011 John Wiley & Sons, Ltd. peer-reviewed |
format |
Article in Journal/Newspaper |
author |
Bromley, Gordon R. M. Hall, Brenda L. Schaefer, Joerg M. Winckler, Gisela Todd, Claire E. Rademaker, Kurt M. |
author_facet |
Bromley, Gordon R. M. Hall, Brenda L. Schaefer, Joerg M. Winckler, Gisela Todd, Claire E. Rademaker, Kurt M. |
author_sort |
Bromley, Gordon R. M. |
title |
Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 |
title_short |
Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 |
title_full |
Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 |
title_fullStr |
Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 |
title_full_unstemmed |
Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 |
title_sort |
glacier fluctuations in the southern peruvian andes during the late-glacial period, constrained with cosmogenic he-3 |
publisher |
Wiley |
publishDate |
2018 |
url |
http://hdl.handle.net/10379/14781 https://doi.org/10.1002/jqs.1424 |
geographic |
Antarctic New Zealand |
geographic_facet |
Antarctic New Zealand |
genre |
Antarc* Antarctic ice core |
genre_facet |
Antarc* Antarctic ice core |
op_relation |
Journal of Quaternary Science Bromley, Gordon R.M., Hall, Brenda L., Schaefer, Joerg M., Winckler, Gisela, Todd, Claire E., & Rademaker, Kurt M. (2011). Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic 3He. Journal of Quaternary Science, 26(1), 37-43. doi:10.1002/jqs.1424 0267-8179 1099-1417 http://hdl.handle.net/10379/14781 doi:10.1002/jqs.1424 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
op_doi |
https://doi.org/10.1002/jqs.1424 |
container_title |
Journal of Quaternary Science |
container_volume |
26 |
container_issue |
1 |
container_start_page |
37 |
op_container_end_page |
43 |
_version_ |
1768378669180387328 |