Significant additional Antarctic warming in atmospheric bias-corrected ARPEGE projections with respect to control run

Beaumet, Julien; Déqué, Michel; Krinner, Gerhard; Agosta, Cécile; Alias, Antoinette; Favier, Vincent

doi:https://doi.org/10.5194/tc-15-3615-2021

Articles | Volume 15, issue 8

https://doi.org/10.5194/tc-15-3615-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Improving the contribution of the land cryosphere to sea level...

https://doi.org/10.5194/tc-15-3615-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 8

Research article

|

06 Aug 2021

Research article |

| 06 Aug 2021

Significant additional Antarctic warming in atmospheric bias-corrected ARPEGE projections with respect to control run

Julien Beaumet, Michel Déqué, Gerhard Krinner, Cécile Agosta, Antoinette Alias, and Vincent Favier

Supplement

https://doi.org/10.5194/tc-15-3615-2021-supplement

Data sets

CNRM-ARPEGE v6.2.4 contribution to Antarctic Cordex Julien Beaumet, Gerhard Krinner, Michel Déqué, and Antoinette Alias https://doi.org/10.5281/zenodo.4059193

Short summary

We use empirical run-time bias correction (also called flux correction) to correct the systematic errors of the ARPEGE atmospheric climate model. When applying the method to future climate projections, we found a lesser poleward shift and an intensification of the maximum of westerly winds present in the southern high latitudes. This yields a significant additional warming of +0.6 to +0.9 K of the Antarctic Ice Sheet with respect to non-corrected control projections using the RCP8.5 scenario.