Andean drought and glacial retreat tied to Greenland warming during the last glacial period
© 2020, The Author(s). Abrupt warming events recorded in Greenland ice cores known as Dansgaard-Oeschger (DO) interstadials are linked to changes in tropical circulation during the last glacial cycle. Corresponding variations in South American summer monsoon (SASM) strength are documented, most comm...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer Science and Business Media LLC
2021
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| Online Access: | https://hdl.handle.net/1721.1/133813 |
| _version_ | 1826200057645367296 |
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| author | Woods, Arielle Rodbell, Donald T Abbott, Mark B Hatfield, Robert G Chen, Christine Y Lehmann, Sophie B McGee, David Weidhaas, Nicholas C Tapia, Pedro M Valero-Garcés, Blas L Bush, Mark B Stoner, Joseph S |
| author_facet | Woods, Arielle Rodbell, Donald T Abbott, Mark B Hatfield, Robert G Chen, Christine Y Lehmann, Sophie B McGee, David Weidhaas, Nicholas C Tapia, Pedro M Valero-Garcés, Blas L Bush, Mark B Stoner, Joseph S |
| author_sort | Woods, Arielle |
| collection | MIT |
| description | © 2020, The Author(s). Abrupt warming events recorded in Greenland ice cores known as Dansgaard-Oeschger (DO) interstadials are linked to changes in tropical circulation during the last glacial cycle. Corresponding variations in South American summer monsoon (SASM) strength are documented, most commonly, in isotopic records from speleothems, but less is known about how these changes affected precipitation and Andean glacier mass balance. Here we present a sediment record spanning the last ~50 ka from Lake Junín (Peru) in the tropical Andes that has sufficient chronologic precision to document abrupt climatic events on a centennial-millennial time scale. DO events involved the near-complete disappearance of glaciers below 4700 masl in the eastern Andean cordillera and major reductions in the level of Peru’s second largest lake. Our results reveal the magnitude of the hydroclimatic disruptions in the highest reaches of the Amazon Basin that were caused by a weakening of the SASM during abrupt arctic warming. Accentuated warming in the Arctic could lead to significant reductions in the precipitation-evaporation balance of the southern tropical Andes with deleterious effects on this densely populated region of South America. |
| first_indexed | 2024-09-23T11:30:21Z |
| format | Article |
| id | mit-1721.1/133813 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:30:21Z |
| publishDate | 2021 |
| publisher | Springer Science and Business Media LLC |
| record_format | dspace |
| spelling | mit-1721.1/1338132021-10-28T04:15:41Z Andean drought and glacial retreat tied to Greenland warming during the last glacial period Woods, Arielle Rodbell, Donald T Abbott, Mark B Hatfield, Robert G Chen, Christine Y Lehmann, Sophie B McGee, David Weidhaas, Nicholas C Tapia, Pedro M Valero-Garcés, Blas L Bush, Mark B Stoner, Joseph S © 2020, The Author(s). Abrupt warming events recorded in Greenland ice cores known as Dansgaard-Oeschger (DO) interstadials are linked to changes in tropical circulation during the last glacial cycle. Corresponding variations in South American summer monsoon (SASM) strength are documented, most commonly, in isotopic records from speleothems, but less is known about how these changes affected precipitation and Andean glacier mass balance. Here we present a sediment record spanning the last ~50 ka from Lake Junín (Peru) in the tropical Andes that has sufficient chronologic precision to document abrupt climatic events on a centennial-millennial time scale. DO events involved the near-complete disappearance of glaciers below 4700 masl in the eastern Andean cordillera and major reductions in the level of Peru’s second largest lake. Our results reveal the magnitude of the hydroclimatic disruptions in the highest reaches of the Amazon Basin that were caused by a weakening of the SASM during abrupt arctic warming. Accentuated warming in the Arctic could lead to significant reductions in the precipitation-evaporation balance of the southern tropical Andes with deleterious effects on this densely populated region of South America. 2021-10-27T19:56:48Z 2021-10-27T19:56:48Z 2020 2021-09-17T13:57:47Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/133813 en 10.1038/S41467-020-19000-8 Nature Communications Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer Science and Business Media LLC Nature |
| spellingShingle | Woods, Arielle Rodbell, Donald T Abbott, Mark B Hatfield, Robert G Chen, Christine Y Lehmann, Sophie B McGee, David Weidhaas, Nicholas C Tapia, Pedro M Valero-Garcés, Blas L Bush, Mark B Stoner, Joseph S Andean drought and glacial retreat tied to Greenland warming during the last glacial period |
| title | Andean drought and glacial retreat tied to Greenland warming during the last glacial period |
| title_full | Andean drought and glacial retreat tied to Greenland warming during the last glacial period |
| title_fullStr | Andean drought and glacial retreat tied to Greenland warming during the last glacial period |
| title_full_unstemmed | Andean drought and glacial retreat tied to Greenland warming during the last glacial period |
| title_short | Andean drought and glacial retreat tied to Greenland warming during the last glacial period |
| title_sort | andean drought and glacial retreat tied to greenland warming during the last glacial period |
| url | https://hdl.handle.net/1721.1/133813 |
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