700,000 years of tropical Andean glaciation
<jats:title>Abstract</jats:title><jats:p>Our understanding of the climatic teleconnections that drove ice-age cycles has been limited by a paucity of well-dated tropical records of glaciation that span several glacial–interglacial intervals. Glacial deposits offer discrete snapshot...
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2023
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ftmit:oai:dspace.mit.edu:1721.1/148115 2023-06-11T04:11:56+02:00 700,000 years of tropical Andean glaciation Rodbell, DT Hatfield, RG Abbott, MB Chen, CY Woods, A Stoner, JS McGee, D Tapia, PM Bush, M Valero-Garcés, BL Lehmann, SB Mark, SZ Weidhaas, NC Hillman, AL Larsen, DJ Delgado, G Katz, SA Solada, KE Morey, AE Finkenbinder, M Valencia, B Rozas-Davila, A Wattrus, N Colman, SM Bustamante, MG Kück, J Pierdominici, S Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences 2023-02-17T18:33:09Z application/pdf https://hdl.handle.net/1721.1/148115 en eng Springer Science and Business Media LLC 10.1038/S41586-022-04873-0 Nature https://hdl.handle.net/1721.1/148115 Rodbell, DT, Hatfield, RG, Abbott, MB, Chen, CY, Woods, A et al. 2022. "700,000 years of tropical Andean glaciation." Nature, 607 (7918). Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ Nature Article http://purl.org/eprint/type/JournalArticle 2023 ftmit 2023-05-29T08:46:31Z <jats:title>Abstract</jats:title><jats:p>Our understanding of the climatic teleconnections that drove ice-age cycles has been limited by a paucity of well-dated tropical records of glaciation that span several glacial–interglacial intervals. Glacial deposits offer discrete snapshots of glacier extent but cannot provide the continuous records required for detailed interhemispheric comparisons. By contrast, lakes located within glaciated catchments can provide continuous archives of upstream glacial activity, but few such records extend beyond the last glacial cycle. Here a piston core from Lake Junín in the uppermost Amazon basin provides the first, to our knowledge, continuous, independently dated archive of tropical glaciation spanning 700,000 years. We find that tropical glaciers tracked changes in global ice volume and followed a clear approximately 100,000-year periodicity. An enhancement in the extent of tropical Andean glaciers relative to global ice volume occurred between 200,000 and 400,000 years ago, during sustained intervals of regionally elevated hydrologic balance that modified the regular approximately 23,000-year pacing of monsoon-driven precipitation. Millennial-scale variations in the extent of tropical Andean glaciers during the last glacial cycle were driven by variations in regional monsoon strength that were linked to temperature perturbations in Greenland ice cores<jats:sup>1</jats:sup>; these interhemispheric connections may have existed during previous glacial cycles.</jats:p> Article in Journal/Newspaper glacier Greenland Greenland ice cores DSpace@MIT (Massachusetts Institute of Technology) Greenland |
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Open Polar |
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DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
description |
<jats:title>Abstract</jats:title><jats:p>Our understanding of the climatic teleconnections that drove ice-age cycles has been limited by a paucity of well-dated tropical records of glaciation that span several glacial–interglacial intervals. Glacial deposits offer discrete snapshots of glacier extent but cannot provide the continuous records required for detailed interhemispheric comparisons. By contrast, lakes located within glaciated catchments can provide continuous archives of upstream glacial activity, but few such records extend beyond the last glacial cycle. Here a piston core from Lake Junín in the uppermost Amazon basin provides the first, to our knowledge, continuous, independently dated archive of tropical glaciation spanning 700,000 years. We find that tropical glaciers tracked changes in global ice volume and followed a clear approximately 100,000-year periodicity. An enhancement in the extent of tropical Andean glaciers relative to global ice volume occurred between 200,000 and 400,000 years ago, during sustained intervals of regionally elevated hydrologic balance that modified the regular approximately 23,000-year pacing of monsoon-driven precipitation. Millennial-scale variations in the extent of tropical Andean glaciers during the last glacial cycle were driven by variations in regional monsoon strength that were linked to temperature perturbations in Greenland ice cores<jats:sup>1</jats:sup>; these interhemispheric connections may have existed during previous glacial cycles.</jats:p> |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
format |
Article in Journal/Newspaper |
author |
Rodbell, DT Hatfield, RG Abbott, MB Chen, CY Woods, A Stoner, JS McGee, D Tapia, PM Bush, M Valero-Garcés, BL Lehmann, SB Mark, SZ Weidhaas, NC Hillman, AL Larsen, DJ Delgado, G Katz, SA Solada, KE Morey, AE Finkenbinder, M Valencia, B Rozas-Davila, A Wattrus, N Colman, SM Bustamante, MG Kück, J Pierdominici, S |
spellingShingle |
Rodbell, DT Hatfield, RG Abbott, MB Chen, CY Woods, A Stoner, JS McGee, D Tapia, PM Bush, M Valero-Garcés, BL Lehmann, SB Mark, SZ Weidhaas, NC Hillman, AL Larsen, DJ Delgado, G Katz, SA Solada, KE Morey, AE Finkenbinder, M Valencia, B Rozas-Davila, A Wattrus, N Colman, SM Bustamante, MG Kück, J Pierdominici, S 700,000 years of tropical Andean glaciation |
author_facet |
Rodbell, DT Hatfield, RG Abbott, MB Chen, CY Woods, A Stoner, JS McGee, D Tapia, PM Bush, M Valero-Garcés, BL Lehmann, SB Mark, SZ Weidhaas, NC Hillman, AL Larsen, DJ Delgado, G Katz, SA Solada, KE Morey, AE Finkenbinder, M Valencia, B Rozas-Davila, A Wattrus, N Colman, SM Bustamante, MG Kück, J Pierdominici, S |
author_sort |
Rodbell, DT |
title |
700,000 years of tropical Andean glaciation |
title_short |
700,000 years of tropical Andean glaciation |
title_full |
700,000 years of tropical Andean glaciation |
title_fullStr |
700,000 years of tropical Andean glaciation |
title_full_unstemmed |
700,000 years of tropical Andean glaciation |
title_sort |
700,000 years of tropical andean glaciation |
publisher |
Springer Science and Business Media LLC |
publishDate |
2023 |
url |
https://hdl.handle.net/1721.1/148115 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Greenland ice cores |
genre_facet |
glacier Greenland Greenland ice cores |
op_source |
Nature |
op_relation |
10.1038/S41586-022-04873-0 Nature https://hdl.handle.net/1721.1/148115 Rodbell, DT, Hatfield, RG, Abbott, MB, Chen, CY, Woods, A et al. 2022. "700,000 years of tropical Andean glaciation." Nature, 607 (7918). |
op_rights |
Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ |
_version_ |
1768387386204487680 |