Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles
Ice cores and offshore sedimentary records demonstrate enhanced ice loss along Antarctic coastal margins during millennial-scale warm intervals within the last glacial termination. However, the distal location and short temporal coverage of these records leads to uncertainty in both the spatial foot...
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ftiupui:oai:scholarworks.indianapolis.iu.edu:1805/40616 2024-06-09T07:40:57+00:00 Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles Piccione, Gavin Blackburn, Terrence Tulaczyk, Slawek Rasbury, E. Troy Hain, Mathis P. Ibarra, Daniel E. Methner, Katharina Tinglof, Chloe Cheney, Brandon Northrup, Paul Licht, Kathy Earth and Environmental Sciences, School of Science 2022-09-15 application/pdf https://hdl.handle.net/1805/40616 en_US eng Springer 10.1038/s41467-022-33009-1 Nature Communications Piccione, G., Blackburn, T., Tulaczyk, S., Rasbury, E. T., Hain, M. P., Ibarra, D. E., Methner, K., Tinglof, C., Cheney, B., Northrup, P., & Licht, K. (2022). Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles. Nature Communications, 13(1), 5428. https://doi.org/10.1038/s41467-022-33009-1 https://hdl.handle.net/1805/40616 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Publisher Cryospheric science Palaeoclimate Glacial Terminations Cryoconcentration Article 2022 ftiupui 2024-05-14T23:30:59Z Ice cores and offshore sedimentary records demonstrate enhanced ice loss along Antarctic coastal margins during millennial-scale warm intervals within the last glacial termination. However, the distal location and short temporal coverage of these records leads to uncertainty in both the spatial footprint of ice loss, and whether millennial-scale ice response occurs outside of glacial terminations. Here we present a >100kyr archive of periodic transitions in subglacial precipitate mineralogy that are synchronous with Late Pleistocene millennial-scale climate cycles. Geochemical and geochronologic data provide evidence for opal formation during cold periods via cryoconcentration of subglacial brine, and calcite formation during warm periods through the addition of subglacial meltwater originating from the ice sheet interior. These freeze-flush cycles represent cyclic changes in subglacial hydrologic-connectivity driven by ice sheet velocity fluctuations. Our findings imply that oscillating Southern Ocean temperatures drive a dynamic response in the Antarctic ice sheet on millennial timescales, regardless of the background climate state. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Southern Ocean Indiana University - Purdue University Indianapolis: IUPUI Scholar Works Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Indiana University - Purdue University Indianapolis: IUPUI Scholar Works |
op_collection_id |
ftiupui |
language |
English |
topic |
Cryospheric science Palaeoclimate Glacial Terminations Cryoconcentration |
spellingShingle |
Cryospheric science Palaeoclimate Glacial Terminations Cryoconcentration Piccione, Gavin Blackburn, Terrence Tulaczyk, Slawek Rasbury, E. Troy Hain, Mathis P. Ibarra, Daniel E. Methner, Katharina Tinglof, Chloe Cheney, Brandon Northrup, Paul Licht, Kathy Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles |
topic_facet |
Cryospheric science Palaeoclimate Glacial Terminations Cryoconcentration |
description |
Ice cores and offshore sedimentary records demonstrate enhanced ice loss along Antarctic coastal margins during millennial-scale warm intervals within the last glacial termination. However, the distal location and short temporal coverage of these records leads to uncertainty in both the spatial footprint of ice loss, and whether millennial-scale ice response occurs outside of glacial terminations. Here we present a >100kyr archive of periodic transitions in subglacial precipitate mineralogy that are synchronous with Late Pleistocene millennial-scale climate cycles. Geochemical and geochronologic data provide evidence for opal formation during cold periods via cryoconcentration of subglacial brine, and calcite formation during warm periods through the addition of subglacial meltwater originating from the ice sheet interior. These freeze-flush cycles represent cyclic changes in subglacial hydrologic-connectivity driven by ice sheet velocity fluctuations. Our findings imply that oscillating Southern Ocean temperatures drive a dynamic response in the Antarctic ice sheet on millennial timescales, regardless of the background climate state. |
author2 |
Earth and Environmental Sciences, School of Science |
format |
Article in Journal/Newspaper |
author |
Piccione, Gavin Blackburn, Terrence Tulaczyk, Slawek Rasbury, E. Troy Hain, Mathis P. Ibarra, Daniel E. Methner, Katharina Tinglof, Chloe Cheney, Brandon Northrup, Paul Licht, Kathy |
author_facet |
Piccione, Gavin Blackburn, Terrence Tulaczyk, Slawek Rasbury, E. Troy Hain, Mathis P. Ibarra, Daniel E. Methner, Katharina Tinglof, Chloe Cheney, Brandon Northrup, Paul Licht, Kathy |
author_sort |
Piccione, Gavin |
title |
Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles |
title_short |
Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles |
title_full |
Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles |
title_fullStr |
Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles |
title_full_unstemmed |
Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles |
title_sort |
subglacial precipitates record antarctic ice sheet response to late pleistocene millennial climate cycles |
publisher |
Springer |
publishDate |
2022 |
url |
https://hdl.handle.net/1805/40616 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Southern Ocean |
op_source |
Publisher |
op_relation |
10.1038/s41467-022-33009-1 Nature Communications Piccione, G., Blackburn, T., Tulaczyk, S., Rasbury, E. T., Hain, M. P., Ibarra, D. E., Methner, K., Tinglof, C., Cheney, B., Northrup, P., & Licht, K. (2022). Subglacial precipitates record Antarctic ice sheet response to late Pleistocene millennial climate cycles. Nature Communications, 13(1), 5428. https://doi.org/10.1038/s41467-022-33009-1 https://hdl.handle.net/1805/40616 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
_version_ |
1801369355665014784 |