TY - JOUR
T1 - A new global ice sheet reconstruction for the past 80 000 years
AU - Gowan, Evan J.
AU - Zhang, Xu
AU - Khosravi, Sara
AU - Rovere, Alessio
AU - Stocchi, Paolo
AU - Hughes, Anna L. C.
AU - Gyllencreutz, Richard
AU - Mangerud, Jan
AU - Svendsen, John-Inge
AU - Lohmann, Gerrit
N1 - Funding Information:
We acknowledge Holger Steffen for helpful discussions on the ideal Earth model parameters and for access to an unpublished database sea-level indicators in the Baltic Sea region. E.J.G. was funded by Impuls-und Vernetzungsfonds, Helmholtz- Exzellenznetzwerke (grant no. ExNet-0001-Phase 2-3) "The Polar System and its Effects on the Ocean Floor (POSY)" and Helmholtz Climate Initiative REKLIM (Regional Climate Change), a joint research project at the Helmholtz Association of German research centers (HGF). Further support to this work has been provided by the project SEA-SCHANGE (RO-5245/1-1) from the Deutsche Forschungsgemeinschaft (DFG). This study was also supported by the PACES-II program at the Alfred Wegener Institute and the Bundesministerium für Bildung und Forschung funded project, PalMod. X.Z. was funded by National Science Foundation of China (42075047), National Key R&D programme of China (2018YFA0606403) and Natural Science Foundation of China-Shandong Joint Fund for Marine Science Research Centers (U1606401). We acknowledge PALSEA, a working group of the International Union for Quaternary Sciences (INQUA) and Past Global Changes (PAGES), which in turn received support from the Swiss Academy of Sciences and the Chinese Academy of Sciences for constructive discussions during the Dublin meeting (2019). Figures in this paper were plotted with the aid of Generic Mapping Tools49.
Publisher Copyright:
© 2021, The Author(s).
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/2/23
Y1 - 2021/2/23
N2 - The evolution of past global ice sheets is highly uncertain. One example is the missing ice problem during the Last Glacial Maximum (LGM, 26 000-19 000 years before present) – an apparent 8-28 m discrepancy between far-field sea level indicators and modelled sea level from ice sheet reconstructions. In the absence of ice sheet reconstructions, researchers often use marine δ
18O proxy records to infer ice volume prior to the LGM. We present a global ice sheet reconstruction for the past 80 000 years, called PaleoMIST 1.0, constructed independently of far-field sea level and δ
18O proxy records. Our reconstruction is compatible with LGM far-field sea-level records without requiring extra ice volume, thus solving the missing ice problem. However, for Marine Isotope Stage 3 (57 000-29 000 years before present) - a pre-LGM period - our reconstruction does not match proxy-based sea level reconstructions, indicating the relationship between marine δ
18O and sea level may be more complex than assumed.
AB - The evolution of past global ice sheets is highly uncertain. One example is the missing ice problem during the Last Glacial Maximum (LGM, 26 000-19 000 years before present) – an apparent 8-28 m discrepancy between far-field sea level indicators and modelled sea level from ice sheet reconstructions. In the absence of ice sheet reconstructions, researchers often use marine δ
18O proxy records to infer ice volume prior to the LGM. We present a global ice sheet reconstruction for the past 80 000 years, called PaleoMIST 1.0, constructed independently of far-field sea level and δ
18O proxy records. Our reconstruction is compatible with LGM far-field sea-level records without requiring extra ice volume, thus solving the missing ice problem. However, for Marine Isotope Stage 3 (57 000-29 000 years before present) - a pre-LGM period - our reconstruction does not match proxy-based sea level reconstructions, indicating the relationship between marine δ
18O and sea level may be more complex than assumed.
U2 - 10.1038/s41467-021-21469-w
DO - 10.1038/s41467-021-21469-w
M3 - Article
SN - 2041-1723
VL - 12
SP - 1
EP - 9
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1199
ER -
