Southern Annular Mode variability

E97862

atmospheric circulation pattern climate variability mode

Southern Annular Mode variability refers to fluctuations in the dominant pattern of atmospheric pressure and westerly wind strength encircling Antarctica, which strongly influence Southern Hemisphere climate and ocean circulation.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
Southern Annular Mode	2
Antarctic Oscillation variability	1
Southern Annular Mode index	1
Southern Annular Mode variability canonical	1
Southern Hemisphere Annular Mode	1

How this entity was disambiguated

This entity first appeared as the object of triple T811436 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Southern Annular Mode variability
Context triple: [Antarctic Circumpolar Current, affectedBy, Southern Annular Mode variability]

A. Madden–Julian Oscillation
The Madden–Julian Oscillation is a large-scale tropical atmospheric pattern characterized by eastward-moving pulses of enhanced and suppressed rainfall that strongly influence global weather and climate variability on intraseasonal timescales.
B. Pacific Decadal Oscillation
The Pacific Decadal Oscillation is a long-term pattern of sea surface temperature variability in the North Pacific Ocean that shifts phases over decades and strongly influences regional climate and marine ecosystems.
C. El Niño–Southern Oscillation
El Niño–Southern Oscillation is a recurring climate pattern involving temperature and pressure changes in the tropical Pacific that strongly influences global weather and climate variability.
D. Southern Oscillation
The Southern Oscillation is a large-scale atmospheric pressure pattern across the tropical Pacific that drives the El Niño–Southern Oscillation climate phenomenon and influences global weather and rainfall.
E. Southern Oscillation Index
The Southern Oscillation Index is a standardized atmospheric pressure-based metric used to monitor and quantify the strength and phase of the El Niño–Southern Oscillation climate pattern.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Southern Annular Mode variability
Target entity description: Southern Annular Mode variability refers to fluctuations in the dominant pattern of atmospheric pressure and westerly wind strength encircling Antarctica, which strongly influence Southern Hemisphere climate and ocean circulation.

A. Madden–Julian Oscillation
The Madden–Julian Oscillation is a large-scale tropical atmospheric pattern characterized by eastward-moving pulses of enhanced and suppressed rainfall that strongly influence global weather and climate variability on intraseasonal timescales.
B. Pacific Decadal Oscillation
The Pacific Decadal Oscillation is a long-term pattern of sea surface temperature variability in the North Pacific Ocean that shifts phases over decades and strongly influences regional climate and marine ecosystems.
C. El Niño–Southern Oscillation
El Niño–Southern Oscillation is a recurring climate pattern involving temperature and pressure changes in the tropical Pacific that strongly influences global weather and climate variability.
D. Southern Oscillation
The Southern Oscillation is a large-scale atmospheric pressure pattern across the tropical Pacific that drives the El Niño–Southern Oscillation climate phenomenon and influences global weather and rainfall.
E. Southern Oscillation Index
The Southern Oscillation Index is a standardized atmospheric pressure-based metric used to monitor and quantify the strength and phase of the El Niño–Southern Oscillation climate pattern.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	atmospheric circulation pattern ⓘ climate variability mode ⓘ
affects	Antarctic climate ⓘ Southern Hemisphere climate ⓘ Southern Hemisphere jet stream position ⓘ Southern Hemisphere storm tracks ⓘ Southern Hemisphere temperature patterns ⓘ Southern Hemisphere westerly winds ⓘ Southern Ocean circulation ⓘ Southern Ocean upwelling ⓘ midlatitude Southern Hemisphere precipitation ⓘ sea ice extent around Antarctica ⓘ
alsoKnownAs	Southern Annular Mode variability ⓘ surface form: Antarctic Oscillation variability SAM variability ⓘ
associatedWith	equatorward shift of storm tracks in negative phase ⓘ higher pressure over Antarctica in negative phase ⓘ lower pressure over Antarctica in positive phase ⓘ poleward shift of storm tracks in positive phase ⓘ
characterizedBy	changes in strength of Southern Hemisphere westerly winds ⓘ fluctuations in zonal mean sea level pressure around Antarctica ⓘ shifts in latitude of Southern Hemisphere westerly wind belt ⓘ
drivenBy	internal atmospheric dynamics ⓘ
hasComponent	negative phase of Southern Annular Mode ⓘ positive phase of Southern Annular Mode ⓘ
hasImpactOn	Antarctic ice sheet surface mass balance ⓘ Southern Hemisphere fire weather conditions ⓘ Southern Hemisphere wave climate ⓘ Southern Ocean carbon uptake ⓘ Southern Ocean heat uptake ⓘ
influencedBy	El Niño–Southern Oscillation ⓘ greenhouse gas forcing ⓘ stratospheric ozone depletion ⓘ tropical sea surface temperature anomalies ⓘ
measuredBy	Southern Annular Mode variability self-linksurface differs ⓘ surface form: Southern Annular Mode index principal component of leading EOF of zonal mean sea level pressure ⓘ
modulates	Southern Hemisphere blocking frequency ⓘ exchange of heat between atmosphere and Southern Ocean ⓘ exchange of momentum between atmosphere and Southern Ocean ⓘ
occursIn	Southern Hemisphere ⓘ surface form: Southern Hemisphere extratropics
relatedTo	Northern Annular Mode variability ⓘ Southern Annular Mode variability self-linksurface differs ⓘ surface form: Southern Hemisphere Annular Mode
studiedIn	atmospheric science ⓘ climate change research ⓘ ocean–atmosphere interaction research ⓘ
timescale	decadal timescale ⓘ interannual timescale ⓘ subseasonal timescale ⓘ

How these facts were elicited

Referenced by (6)

Full triples — surface form annotated when it differs from this entity's canonical label.

Antarctic Circumpolar Current → affectedBy → Southern Annular Mode variability ⓘ

Brazil–Malvinas Confluence → affectedBy → Southern Annular Mode variability ⓘ

this entity surface form: Southern Annular Mode

Southern Annular Mode variability → alsoKnownAs → Southern Annular Mode variability ⓘ

this entity surface form: Antarctic Oscillation variability

Southern Annular Mode variability → measuredBy → Southern Annular Mode variability self-linksurface differs ⓘ

this entity surface form: Southern Annular Mode index

Southern Annular Mode variability → relatedTo → Southern Annular Mode variability self-linksurface differs ⓘ

this entity surface form: Southern Hemisphere Annular Mode

Subtropical Front (South Pacific) → affectedBy → Southern Annular Mode variability ⓘ