Articles | Volume 17, issue 1
Clim. Past, 17, 37–62, 2021
https://doi.org/10.5194/cp-17-37-2021

Special issue: Paleoclimate Modelling Intercomparison Project phase 4 (PMIP4)...

Clim. Past, 17, 37–62, 2021
https://doi.org/10.5194/cp-17-37-2021

Research article 11 Jan 2021

Research article | 11 Jan 2021

A multi-model CMIP6-PMIP4 study of Arctic sea ice at 127 ka: sea ice data compilation and model differences

Masa Kageyama et al.

Data sets

NOAA Optimum Interpolation (OI) Sea Surface Temperature (SST) V2 NOAA/OAR/ESRL PSL https://psl.noaa.gov/data/gridded/data.noaa.oisst.v2.html

Short summary
The Last interglacial (ca. 127 000 years ago) is a period with increased summer insolation at high northern latitudes, resulting in a strong reduction in Arctic sea ice. The latest PMIP4-CMIP6 models all simulate this decrease, consistent with reconstructions. However, neither the models nor the reconstructions agree on the possibility of a seasonally ice-free Arctic. Work to clarify the reasons for this model divergence and the conflicting interpretations of the records will thus be needed.