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

Data sets

Glacial Ocean Map (GLOMAP) A. Paul, S. Mulitza, R. Stein, and M. Werner

Last Glacial Maximum SST proxy collection and data assimilation J. E. Tierney, J. Zhu, J. King, S. B. Malevich, G. Hakim, and C. Poulsen

ECHAM6-wiso annual mean data for LGM and PI A. Cauquoin, A. Abe-Ouchi, T. Obase, W.-L. Chan, A. Paul, and M. Werner

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.