Southern Annular Mode persistence and westerly jet: a reassessment using high-resolution global models

Chen, Ting-Chen; Goosse, Hugues; Davrinche, Cécile; Libera, Stephy; Roberts, Christopher; Aengenheyster, Matthias; Strommen, Kristian; Roberts, Malcolm; Ghosh, Rohit; von Storch, Jin-Song

doi:10.5194/wcd-6-1179-2025

Southern Annular Mode persistence and westerly jet: a reassessment using high-resolution global models

Chen, Ting-Chen

;

Goosse, Hugues

;

Davrinche, Cécile

;

Libera, Stephy

;

von Storch, Jin-Song

;et.al.

(2025) Weather and Climate Dynamics — Vol. 6, n° 4, p. 1179-1193 (2025)

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Authors

Chen, Ting-ChenUCLouvain
Author
Goosse, HuguesUCLouvain
Author
Davrinche, CécileUCLouvain
Author
Libera, StephyUCLouvain
Author
von Storch, Jin-SongMax-Planck Institute for Meteorology, Hamburg, Germany
Author

Abstract

This study evaluates the performance of high-resolution (grid sizes of 9–28 km for the atmosphere; 5–13 km for the ocean) global simulations from the EERIE project in representing the persistence of the Southern Annular Mode (SAM), a leading mode of Southern Hemisphere climate variability. Using the decorrelation timescale of the SAM index (τ), we compare EERIE simulations with CMIP6 models and ERA5 reanalysis.

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UCLouvainSST/ELI/ELIC - Earth & Climate

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Chen, T.-C., Goosse, H., Davrinche, C., Libera, S., Roberts, C., Aengenheyster, M., Strommen, K., Roberts, M., Ghosh, R., & von Storch, J.-S. (2025). Southern Annular Mode persistence and westerly jet: a reassessment using high-resolution global models. Weather and Climate Dynamics, 6(4), 1179-1193. https://doi.org/10.5194/wcd-6-1179-2025 (Original work published 2025)