Effects of Last Glacial Maximum (LGM) sea surface temperature and sea ice extent on the isotope–temperature slope at polar ice core sites

Cauquoin, Alexandre; Abe-Ouchi, Ayako; Obase, Takashi; Chan, Wing-Le; Paul, André; Werner, Martin

doi:https://doi.org/10.5194/cp-19-1275-2023

Articles | Volume 19, issue 6

https://doi.org/10.5194/cp-19-1275-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Ice core science at the three poles (CP/TC inter-journal SI)

https://doi.org/10.5194/cp-19-1275-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 6

Research article

|

26 Jun 2023

Research article |

| 26 Jun 2023

Effects of Last Glacial Maximum (LGM) sea surface temperature and sea ice extent on the isotope–temperature slope at polar ice core sites

Alexandre Cauquoin, Ayako Abe-Ouchi, Takashi Obase, Wing-Le Chan, André Paul, and Martin Werner

Supplement

https://doi.org/10.5194/cp-19-1275-2023-supplement

Data sets

Glacial Ocean Map (GLOMAP) A. Paul, S. Mulitza, R. Stein, and M. Werner https://doi.org/10.1594/PANGAEA.923262

Last Glacial Maximum SST proxy collection and data assimilation J. E. Tierney, J. Zhu, J. King, S. B. Malevich, G. Hakim, and C. Poulsen https://doi.org/10.1594/PANGAEA.920596

ECHAM6-wiso annual mean data for LGM and PI A. Cauquoin, A. Abe-Ouchi, T. Obase, W.-L. Chan, A. Paul, and M. Werner https://doi.org/10.5281/zenodo.7983371

Short summary

Stable water isotopes are tracers of climate processes occurring in the hydrological cycle. They are widely used to reconstruct the past variations of polar temperature before the instrumental era thanks to their measurements in ice cores. However, the relationship between measured isotopes and temperature has large uncertainties. In our study, we investigate how the sea surface conditions (temperature, sea ice, ocean circulation) impact this relationship for a cold to warm climate change.