Southern Oscillation Index
E22759
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Southern Oscillation Index canonical | 12 |
How this entity was disambiguated
This entity first appeared as the object of triple T174464 — 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 Oscillation Index Context triple: [El Niño–Southern Oscillation, isMeasuredBy, Southern Oscillation Index]
-
A.
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.
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B.
La Niña
La Niña is the cool phase of the El Niño–Southern Oscillation climate pattern, characterized by unusually cold ocean temperatures in the central and eastern equatorial Pacific and associated shifts in global weather.
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C.
Coral Sea
The Coral Sea is a marginal sea off the northeast coast of Australia, renowned for its clear waters, rich marine biodiversity, and the Great Barrier Reef.
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D.
Tasman Sea
The Tasman Sea is the body of water separating Australia and New Zealand, known for its often rough conditions and significance to regional shipping and marine life.
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E.
Indian Ocean
The Indian Ocean is the world’s third-largest ocean, lying between Africa, Asia, Australia, and the Southern Ocean, and serving as a major route for global trade and maritime activity.
- 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 Oscillation Index Target entity description: 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.
-
A.
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.
-
B.
La Niña
La Niña is the cool phase of the El Niño–Southern Oscillation climate pattern, characterized by unusually cold ocean temperatures in the central and eastern equatorial Pacific and associated shifts in global weather.
-
C.
Coral Sea
The Coral Sea is a marginal sea off the northeast coast of Australia, renowned for its clear waters, rich marine biodiversity, and the Great Barrier Reef.
-
D.
Tasman Sea
The Tasman Sea is the body of water separating Australia and New Zealand, known for its often rough conditions and significance to regional shipping and marine life.
-
E.
Indian Ocean
The Indian Ocean is the world’s third-largest ocean, lying between Africa, Asia, Australia, and the Southern Ocean, and serving as a major route for global trade and maritime activity.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
atmospheric index
ⓘ
climate index ⓘ time series ⓘ |
| abbreviation | SOI ⓘ |
| basedOn |
atmospheric pressure differences
ⓘ
sea level pressure ⓘ |
| category | climate variability index ⓘ |
| compares |
sea level pressure at Darwin, Australia
ⓘ
sea level pressure at Tahiti ⓘ |
| correlatesWith |
Walker circulation strength
ⓘ
sea surface temperature anomalies in the tropical Pacific ⓘ trade wind strength in the tropical Pacific ⓘ |
| dataSource | surface pressure observations ⓘ |
| definedAs | standardized difference in mean sea level pressure between Tahiti and Darwin ⓘ |
| derivedFrom | long-term mean and standard deviation of sea level pressure ⓘ |
| developedFor | quantifying the Southern Oscillation ⓘ |
| hasSignConvention |
negative values indicate El Niño-like conditions
ⓘ
positive values indicate La Niña-like conditions ⓘ |
| hasUnit | dimensionless index ⓘ |
| helpsExplain | interannual climate variability ⓘ |
| influences |
global temperature variability
ⓘ
rainfall patterns in Australia ⓘ rainfall patterns in the Pacific region ⓘ tropical cyclone activity in some basins ⓘ |
| measures |
phase of the El Niño–Southern Oscillation
ⓘ
strength of the El Niño–Southern Oscillation ⓘ |
| monitors | atmospheric component of ENSO ⓘ |
| namedAfter | Southern Oscillation ⓘ |
| partOf | ENSO monitoring system ⓘ |
| publishedBy | Australian Bureau of Meteorology ⓘ |
| region | tropical Pacific ⓘ |
| relatedIndex |
Multivariate ENSO Index
ⓘ
Oceanic Niño Index ⓘ |
| relatedTo | El Niño–Southern Oscillation ⓘ |
| timeScale |
daily values
ⓘ
monthly values ⓘ seasonal averages ⓘ |
| usedBy |
climate prediction centers
ⓘ
climatologists ⓘ meteorologists ⓘ oceanographers ⓘ |
| usedFor |
climate monitoring
ⓘ
drought monitoring ⓘ flood risk assessment ⓘ monitoring El Niño events ⓘ monitoring La Niña events ⓘ seasonal climate prediction ⓘ |
| uses | standardized anomalies of sea level pressure ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Southern Oscillation Index Description of subject: 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.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.