700,000 years of tropical Andean glaciation
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 recor...
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Online Access: | http://www.osti.gov/servlets/purl/1887017 https://www.osti.gov/biblio/1887017 https://doi.org/10.1038/s41586-022-04873-0 |
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ftosti:oai:osti.gov:1887017 2023-07-30T04:03:38+02:00 700,000 years of tropical Andean glaciation Rodbell, D. T. Hatfield, R. G. Abbott, M. B. Chen, C. Y. Woods, A. Stoner, J. S. McGee, D. Tapia, P. M. Bush, M. Valero-Garcés, B. L. Lehmann, S. B. Mark, S. Z. Weidhaas, N. C. Hillman, A. L. Larsen, D. J. Delgado, G. Katz, S. A. Solada, K. E. Morey, A. E. Finkenbinder, M. Valencia, B. Rozas-Davila, A. Wattrus, N. Colman, S. M. Bustamante, M. G. Kück, J. Pierdominici, S. 2022-10-25 application/pdf http://www.osti.gov/servlets/purl/1887017 https://www.osti.gov/biblio/1887017 https://doi.org/10.1038/s41586-022-04873-0 unknown http://www.osti.gov/servlets/purl/1887017 https://www.osti.gov/biblio/1887017 https://doi.org/10.1038/s41586-022-04873-0 doi:10.1038/s41586-022-04873-0 54 ENVIRONMENTAL SCIENCES 2022 ftosti https://doi.org/10.1038/s41586-022-04873-0 2023-07-11T10:14:49Z 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; these interhemispheric connections may have existed during previous glacial cycles. Other/Unknown Material glacier Greenland Greenland ice cores SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Greenland Nature 607 7918 301 306 |
institution |
Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Rodbell, D. T. Hatfield, R. G. Abbott, M. B. Chen, C. Y. Woods, A. Stoner, J. S. McGee, D. Tapia, P. M. Bush, M. Valero-Garcés, B. L. Lehmann, S. B. Mark, S. Z. Weidhaas, N. C. Hillman, A. L. Larsen, D. J. Delgado, G. Katz, S. A. Solada, K. E. Morey, A. E. Finkenbinder, M. Valencia, B. Rozas-Davila, A. Wattrus, N. Colman, S. M. Bustamante, M. G. Kück, J. Pierdominici, S. 700,000 years of tropical Andean glaciation |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
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; these interhemispheric connections may have existed during previous glacial cycles. |
author |
Rodbell, D. T. Hatfield, R. G. Abbott, M. B. Chen, C. Y. Woods, A. Stoner, J. S. McGee, D. Tapia, P. M. Bush, M. Valero-Garcés, B. L. Lehmann, S. B. Mark, S. Z. Weidhaas, N. C. Hillman, A. L. Larsen, D. J. Delgado, G. Katz, S. A. Solada, K. E. Morey, A. E. Finkenbinder, M. Valencia, B. Rozas-Davila, A. Wattrus, N. Colman, S. M. Bustamante, M. G. Kück, J. Pierdominici, S. |
author_facet |
Rodbell, D. T. Hatfield, R. G. Abbott, M. B. Chen, C. Y. Woods, A. Stoner, J. S. McGee, D. Tapia, P. M. Bush, M. Valero-Garcés, B. L. Lehmann, S. B. Mark, S. Z. Weidhaas, N. C. Hillman, A. L. Larsen, D. J. Delgado, G. Katz, S. A. Solada, K. E. Morey, A. E. Finkenbinder, M. Valencia, B. Rozas-Davila, A. Wattrus, N. Colman, S. M. Bustamante, M. G. Kück, J. Pierdominici, S. |
author_sort |
Rodbell, D. T. |
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 |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1887017 https://www.osti.gov/biblio/1887017 https://doi.org/10.1038/s41586-022-04873-0 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Greenland ice cores |
genre_facet |
glacier Greenland Greenland ice cores |
op_relation |
http://www.osti.gov/servlets/purl/1887017 https://www.osti.gov/biblio/1887017 https://doi.org/10.1038/s41586-022-04873-0 doi:10.1038/s41586-022-04873-0 |
op_doi |
https://doi.org/10.1038/s41586-022-04873-0 |
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Nature |
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607 |
container_issue |
7918 |
container_start_page |
301 |
op_container_end_page |
306 |
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1772814668945948672 |