Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes
Discerning the timing and pattern of late Quaternary glacier variability in the tropical Andes is important for our understanding of global climate change. Terrestrial cosmogenic nuclide (TCN) ages (48) on moraines and radiocarbon-dated clastic sediment records from a moraine-dammed lake at Nevado H...
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ftosti:oai:osti.gov:1809189 2023-07-30T03:59:22+02:00 Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes Stansell, Nathan D. Rodbell, Donald T. Licciardi, Joseph M. Sedlak, Christopher M. Schweinsberg, Avriel D. Huss, Elizabeth G. Delgado, Grace M. Zimmerman, Susan H. Finkel, Robert C. 2021-10-29 application/pdf http://www.osti.gov/servlets/purl/1809189 https://www.osti.gov/biblio/1809189 https://doi.org/10.1130/g36735.1 unknown http://www.osti.gov/servlets/purl/1809189 https://www.osti.gov/biblio/1809189 https://doi.org/10.1130/g36735.1 doi:10.1130/g36735.1 58 GEOSCIENCES 2021 ftosti https://doi.org/10.1130/g36735.1 2023-07-11T10:05:35Z Discerning the timing and pattern of late Quaternary glacier variability in the tropical Andes is important for our understanding of global climate change. Terrestrial cosmogenic nuclide (TCN) ages (48) on moraines and radiocarbon-dated clastic sediment records from a moraine-dammed lake at Nevado Huaguruncho, Peru, document the waxing and waning of alpine glaciers in the Eastern Cordillera during the past ~15 k.y. Additionally, the integrated moraine and lake records indicate that ice advanced at 14.1 ± 0.4 ka, during the first half of the Antarctic Cold Reversal, and began retreating by 13.7 ± 0.4 ka. Ice retreated and paraglacial sedimentation declined until ca. 12 ka, when proxy indicators of glacigenic sediment increased sharply, heralding an ice advance that culminated in multiple moraine positions from 11.6 ± 0.2 ka to 10.3 ± 0.2 ka. Proxy indicators of glacigenic sediment input suggest oscillating ice extents from ca. 10 to 4 ka, and somewhat more extensive ice cover from 4 to 2 ka, followed by ice retreat. The lack of TCN ages from these intervals suggests that glaciers were less extensive than during the late Holocene. A final Holocene advance occurred during the Little Ice Age (LIA, ca. 0.4 to 0.2 ka) under colder and wetter conditions as documented in regional proxy archives. The pattern of glacier variability at Huaguruncho during the Late Glacial and Holocene is similar to the pattern of tropical Atlantic sea-surface temperatures, and provides evidence that prior to the LIA, ice extent in the eastern tropical Andes was decoupled from temperatures in the high-latitude North Atlantic. Other/Unknown Material Antarc* Antarctic North Atlantic SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Antarctic The Antarctic Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Geology 43 8 747 750 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
58 GEOSCIENCES |
spellingShingle |
58 GEOSCIENCES Stansell, Nathan D. Rodbell, Donald T. Licciardi, Joseph M. Sedlak, Christopher M. Schweinsberg, Avriel D. Huss, Elizabeth G. Delgado, Grace M. Zimmerman, Susan H. Finkel, Robert C. Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes |
topic_facet |
58 GEOSCIENCES |
description |
Discerning the timing and pattern of late Quaternary glacier variability in the tropical Andes is important for our understanding of global climate change. Terrestrial cosmogenic nuclide (TCN) ages (48) on moraines and radiocarbon-dated clastic sediment records from a moraine-dammed lake at Nevado Huaguruncho, Peru, document the waxing and waning of alpine glaciers in the Eastern Cordillera during the past ~15 k.y. Additionally, the integrated moraine and lake records indicate that ice advanced at 14.1 ± 0.4 ka, during the first half of the Antarctic Cold Reversal, and began retreating by 13.7 ± 0.4 ka. Ice retreated and paraglacial sedimentation declined until ca. 12 ka, when proxy indicators of glacigenic sediment increased sharply, heralding an ice advance that culminated in multiple moraine positions from 11.6 ± 0.2 ka to 10.3 ± 0.2 ka. Proxy indicators of glacigenic sediment input suggest oscillating ice extents from ca. 10 to 4 ka, and somewhat more extensive ice cover from 4 to 2 ka, followed by ice retreat. The lack of TCN ages from these intervals suggests that glaciers were less extensive than during the late Holocene. A final Holocene advance occurred during the Little Ice Age (LIA, ca. 0.4 to 0.2 ka) under colder and wetter conditions as documented in regional proxy archives. The pattern of glacier variability at Huaguruncho during the Late Glacial and Holocene is similar to the pattern of tropical Atlantic sea-surface temperatures, and provides evidence that prior to the LIA, ice extent in the eastern tropical Andes was decoupled from temperatures in the high-latitude North Atlantic. |
author |
Stansell, Nathan D. Rodbell, Donald T. Licciardi, Joseph M. Sedlak, Christopher M. Schweinsberg, Avriel D. Huss, Elizabeth G. Delgado, Grace M. Zimmerman, Susan H. Finkel, Robert C. |
author_facet |
Stansell, Nathan D. Rodbell, Donald T. Licciardi, Joseph M. Sedlak, Christopher M. Schweinsberg, Avriel D. Huss, Elizabeth G. Delgado, Grace M. Zimmerman, Susan H. Finkel, Robert C. |
author_sort |
Stansell, Nathan D. |
title |
Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes |
title_short |
Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes |
title_full |
Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes |
title_fullStr |
Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes |
title_full_unstemmed |
Late Glacial and Holocene glacier fluctuations at Nevado Huaguruncho in the Eastern Cordillera of the Peruvian Andes |
title_sort |
late glacial and holocene glacier fluctuations at nevado huaguruncho in the eastern cordillera of the peruvian andes |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1809189 https://www.osti.gov/biblio/1809189 https://doi.org/10.1130/g36735.1 |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) |
geographic |
Antarctic The Antarctic Dammed Lake |
geographic_facet |
Antarctic The Antarctic Dammed Lake |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_relation |
http://www.osti.gov/servlets/purl/1809189 https://www.osti.gov/biblio/1809189 https://doi.org/10.1130/g36735.1 doi:10.1130/g36735.1 |
op_doi |
https://doi.org/10.1130/g36735.1 |
container_title |
Geology |
container_volume |
43 |
container_issue |
8 |
container_start_page |
747 |
op_container_end_page |
750 |
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1772810165653864448 |