Southern Annular Mode
The Souther Annular Mode is the dominate mode of extra-tropical variability in the Southern Hemisphere. It influences ocean temperatures, sea ice (Doddridge & Marshall, 2017), and rainfall.
The data shown here come from the Marshall SAM index (Marshall, 2003), and can be downloaded from https://legacy.bas.ac.uk/met/gjma/sam.html.
The monthly Southern Annular Mode index.
The annual Southern Annular Mode index.
References
2017
- Modulation of the Seasonal Cycle of Antarctic Sea Ice Extent Related to the Southern Annular ModeGeophysical Research Letters, Oct 2017
2003
- Trends in the Southern Annular Mode from Observations and ReanalysesJournal of Climate, Dec 2003