The Cryosphere
The Cryosphere
TC
Articles | Volume 17, issue 2
Articles | Volume 17, issue 2
https://doi.org/10.5194/tc-17-701-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-17-701-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 2
Research article
 | 
13 Feb 2023
Research article |  | 13 Feb 2023

Antarctic sea ice regime shift associated with decreasing zonal symmetry in the Southern Annular Mode

Serena Schroeter, Terence J. O'Kane, and Paul A. Sandery

Supplement

https://doi.org/10.5194/tc-17-701-2023-supplement

Data sets

The Met Office Hadley Centre sea ice and sea surface temperature data set, version 2: 1. Sea ice concentrations (https://www.metoffice.gov.uk/hadobs/hadisst/) H. A. Titchner and N. A. Rayner https://doi.org/10.1002/2013JD020316

RA-55: Japanese 55-year Reanalysis, Monthly Means and Variances JMA https://doi.org/10.5065/D60G3H5B

NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 4 W. N. Meier, F. Fetterer, A. K. Windnagel, and J. S. Stewart https://doi.org/10.7265/efmz-2t65

Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2 W. N. Meier, F. Fetterer, A. K. Windnagel, and J. S. Stewart https://doi.org/10.7265/tgam-yv28

Download
Short summary
Antarctic sea ice has increased over much of the satellite record, but we show that the early, strongly opposing regional trends diminish and reverse over time, leading to overall negative trends in recent decades. The dominant pattern of atmospheric flow has changed from strongly east–west to more wave-like with enhanced north–south winds. Sea surface temperatures have also changed from circumpolar cooling to regional warming, suggesting recent record low sea ice will not rapidly recover.
Read more