The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3
There is disagreement in the Quaternary research community in how much of the marine δ18O signal is driven by change in ice volume. Here, we examine this topic by bringing together empirical and modelling work for Marine Isotope Stage 3 (MIS 3; 57 ka to 29 ka), a time when the marine δ18O record ind...
Published in: | Global and Planetary Change |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Naturhistoriska riksmuseet, Enheten för paleobiologi
2022
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4978 https://doi.org/10.1016/j.gloplacha.2022.103814 |
id |
ftnrm:oai:DiVA.org:nrm-4978 |
---|---|
record_format |
openpolar |
spelling |
ftnrm:oai:DiVA.org:nrm-4978 2023-05-15T16:13:11+02:00 The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3 Dalton, April S. Pico, Tamara Gowan, Evan J. Clague, John J. Forman, Steven L. McMartin, Isabelle Sarala, Pertti Helmens, Karin 2022 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4978 https://doi.org/10.1016/j.gloplacha.2022.103814 eng eng Naturhistoriska riksmuseet, Enheten för paleobiologi Department of Physical Geography and Geoecology, Charles University, Prague, Czech Republic Caltech, Pasadena, CA, United States Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; MARUM, University of Bremen, Bremen, Germany Department of Earth and Environmental Sciences, Kumamoto University, Kumamoto, Japan Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia, Canada Department of Geosciences, Baylor University, Waco, TX, United States Geological Survey of Canada, Natural Resources Canada, Ottawa, Ontario, Canada Oulu Mining School, P.O. Box 3000, FI-90014, University of Oulu, Finland; Geological Survey of Finland, P.O. Box 77, FI-96101 Rovaniemi, Finland Amsterdam Global and Planetary Change, 0921-8181, 2022, 212, s. 103814-103814 orcid:0000-0001-7234-8223 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4978 doi:10.1016/j.gloplacha.2022.103814 info:eu-repo/semantics/openAccess Mid-Wisconsinan Mid-Weichselian Global mean sea level Fennoscandian Laurentide Cordilleran Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Geosciences Multidisciplinary Multidisciplinär geovetenskap Article in journal info:eu-repo/semantics/article text 2022 ftnrm https://doi.org/10.1016/j.gloplacha.2022.103814 2022-12-15T17:17:16Z There is disagreement in the Quaternary research community in how much of the marine δ18O signal is driven by change in ice volume. Here, we examine this topic by bringing together empirical and modelling work for Marine Isotope Stage 3 (MIS 3; 57 ka to 29 ka), a time when the marine δ18O record indicates moderate continental glaciation and a global mean sea level between −60 m and −90 m. We compile and interpret geological data dating to MIS 3 to constrain the extent of major Northern Hemisphere ice sheets (Eurasian, Laurentide, Cordilleran). Many key data, especially published in the past ~15 years, argue for an ice-free core of the formerly glaciated regions that is inconsistent with inferences from the marine δ18O record. We compile results from prior studies of glacial isostatic adjustment to show the volume of ice inferred from the marine δ18O record is unable to fit within the plausible footprint of Northern Hemisphere ice sheets during MIS 3. Instead, a global mean sea level between −30 m and − 50 m is inferred from geological constraints and glacial isostatic modelling. Furthermore, limited North American ice volumes during MIS 3 are consistent with most sea-level bounds through that interval. We can find no concrete evidence of large-scale glaciation during MIS 3 that could account for the missing ~30 m of sea-level equivalent during that time, which suggests that changes in the marine δ18O record are driven by other variables, including water temperature. This work urges caution regarding the reliance of the marine δ18O record as a de facto indicator of continental ice when few geological constraints are available, which underpins many Quaternary studies. T.P. acknowledges funding from an NSF-EAR Postdoctoral Fellowship and UC President's Postdoc Program Fellowship. Field work innorthern Hudson Bay (Nunavut) is a contribution to Natural Resources Canada Geomapping for Energy and Minerals (GEM) Program (NRCancomribution number 20210064). E.J .G. was funded by Impuls- und Vernetzungsfonds, ... Article in Journal/Newspaper Fennoscandian Hudson Bay Nunavut Swedish Museum of Natural History: Publications (DiVA) Nunavut Hudson Bay Canada Hudson Global and Planetary Change 212 103814 |
institution |
Open Polar |
collection |
Swedish Museum of Natural History: Publications (DiVA) |
op_collection_id |
ftnrm |
language |
English |
topic |
Mid-Wisconsinan Mid-Weichselian Global mean sea level Fennoscandian Laurentide Cordilleran Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Geosciences Multidisciplinary Multidisciplinär geovetenskap |
spellingShingle |
Mid-Wisconsinan Mid-Weichselian Global mean sea level Fennoscandian Laurentide Cordilleran Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Geosciences Multidisciplinary Multidisciplinär geovetenskap Dalton, April S. Pico, Tamara Gowan, Evan J. Clague, John J. Forman, Steven L. McMartin, Isabelle Sarala, Pertti Helmens, Karin The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3 |
topic_facet |
Mid-Wisconsinan Mid-Weichselian Global mean sea level Fennoscandian Laurentide Cordilleran Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Geosciences Multidisciplinary Multidisciplinär geovetenskap |
description |
There is disagreement in the Quaternary research community in how much of the marine δ18O signal is driven by change in ice volume. Here, we examine this topic by bringing together empirical and modelling work for Marine Isotope Stage 3 (MIS 3; 57 ka to 29 ka), a time when the marine δ18O record indicates moderate continental glaciation and a global mean sea level between −60 m and −90 m. We compile and interpret geological data dating to MIS 3 to constrain the extent of major Northern Hemisphere ice sheets (Eurasian, Laurentide, Cordilleran). Many key data, especially published in the past ~15 years, argue for an ice-free core of the formerly glaciated regions that is inconsistent with inferences from the marine δ18O record. We compile results from prior studies of glacial isostatic adjustment to show the volume of ice inferred from the marine δ18O record is unable to fit within the plausible footprint of Northern Hemisphere ice sheets during MIS 3. Instead, a global mean sea level between −30 m and − 50 m is inferred from geological constraints and glacial isostatic modelling. Furthermore, limited North American ice volumes during MIS 3 are consistent with most sea-level bounds through that interval. We can find no concrete evidence of large-scale glaciation during MIS 3 that could account for the missing ~30 m of sea-level equivalent during that time, which suggests that changes in the marine δ18O record are driven by other variables, including water temperature. This work urges caution regarding the reliance of the marine δ18O record as a de facto indicator of continental ice when few geological constraints are available, which underpins many Quaternary studies. T.P. acknowledges funding from an NSF-EAR Postdoctoral Fellowship and UC President's Postdoc Program Fellowship. Field work innorthern Hudson Bay (Nunavut) is a contribution to Natural Resources Canada Geomapping for Energy and Minerals (GEM) Program (NRCancomribution number 20210064). E.J .G. was funded by Impuls- und Vernetzungsfonds, ... |
format |
Article in Journal/Newspaper |
author |
Dalton, April S. Pico, Tamara Gowan, Evan J. Clague, John J. Forman, Steven L. McMartin, Isabelle Sarala, Pertti Helmens, Karin |
author_facet |
Dalton, April S. Pico, Tamara Gowan, Evan J. Clague, John J. Forman, Steven L. McMartin, Isabelle Sarala, Pertti Helmens, Karin |
author_sort |
Dalton, April S. |
title |
The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3 |
title_short |
The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3 |
title_full |
The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3 |
title_fullStr |
The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3 |
title_full_unstemmed |
The marine δ18O record overestimates continental ice volume during Marine Isotope Stage 3 |
title_sort |
marine δ18o record overestimates continental ice volume during marine isotope stage 3 |
publisher |
Naturhistoriska riksmuseet, Enheten för paleobiologi |
publishDate |
2022 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4978 https://doi.org/10.1016/j.gloplacha.2022.103814 |
geographic |
Nunavut Hudson Bay Canada Hudson |
geographic_facet |
Nunavut Hudson Bay Canada Hudson |
genre |
Fennoscandian Hudson Bay Nunavut |
genre_facet |
Fennoscandian Hudson Bay Nunavut |
op_relation |
Global and Planetary Change, 0921-8181, 2022, 212, s. 103814-103814 orcid:0000-0001-7234-8223 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4978 doi:10.1016/j.gloplacha.2022.103814 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2022.103814 |
container_title |
Global and Planetary Change |
container_volume |
212 |
container_start_page |
103814 |
_version_ |
1765998793959931904 |