Indian Ocean Dipole

E361786

climate phenomenon ocean–atmosphere coupled mode

The Indian Ocean Dipole is a climate phenomenon characterized by irregular sea surface temperature differences between the western and eastern Indian Ocean, which strongly affects regional weather patterns such as rainfall and monsoon behavior.

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

All labels observed (2)

Label	Occurrences
Indian Ocean Dipole canonical	7
Indian Ocean Basin Mode	2

How this entity was disambiguated

This entity first appeared as the object of triple T3467501 — 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: Indian Ocean Dipole
Context triple: [Southwest monsoon, influencedBy, Indian Ocean Dipole]

A. 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.
B. Indian Ocean circulation
Indian Ocean circulation refers to the large-scale system of currents, gyres, and seasonal monsoon-driven flows that redistribute heat, salt, and nutrients throughout the Indian Ocean basin.
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 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.
E. 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.
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: Indian Ocean Dipole
Target entity description: The Indian Ocean Dipole is a climate phenomenon characterized by irregular sea surface temperature differences between the western and eastern Indian Ocean, which strongly affects regional weather patterns such as rainfall and monsoon behavior.

A. 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.
B. Indian Ocean circulation
Indian Ocean circulation refers to the large-scale system of currents, gyres, and seasonal monsoon-driven flows that redistribute heat, salt, and nutrients throughout the Indian Ocean basin.
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 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.
E. 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.
F. None of above. chosen

Statements (50)

Predicate	Object
instanceOf	climate phenomenon ⓘ ocean–atmosphere coupled mode ⓘ
affects	Australian rainfall ⓘ East African rainfall ⓘ Indian Ocean region climate ⓘ Indian subcontinent rainfall ⓘ Indonesian rainfall ⓘ South Asian monsoon ⓘ Southeast Asian monsoon ⓘ agricultural productivity in affected regions ⓘ marine ecosystems in the Indian Ocean ⓘ regional food security ⓘ
alsoKnownAs	IOD ⓘ
characterizedBy	sea surface temperature gradient between western and eastern Indian Ocean ⓘ
componentOf	global climate variability ⓘ
discoveredBy	climate scientists in late 20th century ⓘ
hasPhase	negative phase ⓘ neutral phase ⓘ positive phase ⓘ
hasSpatialPattern	west–east dipole in sea surface temperature anomalies ⓘ
influences	Australian winter and spring rainfall ⓘ East African short rains ⓘ Indian Ocean Walker circulation ⓘ onset of Indian summer monsoon ⓘ strength of Indian summer monsoon ⓘ tropical cyclone activity in the Indian Ocean ⓘ
involves	atmospheric circulation anomalies ⓘ changes in convection over the Indian Ocean ⓘ sea surface temperature anomalies ⓘ
linkedTo	El Niño–Southern Oscillation ⓘ surface form: ENSO El Niño–Southern Oscillation ⓘ
measuredBy	Dipole Mode Index ⓘ
monitoredBy	in situ ocean buoys ⓘ reanalysis datasets ⓘ satellite observations ⓘ
negativePhaseDefinition	cooler western Indian Ocean and warmer eastern Indian Ocean ⓘ
negativePhaseImpact	enhanced rainfall over Indonesia ⓘ reduced rainfall over East Africa ⓘ
occursIn	Indian Ocean ⓘ
positivePhaseDefinition	warmer western Indian Ocean and cooler eastern Indian Ocean ⓘ
positivePhaseImpact	enhanced rainfall over East Africa ⓘ reduced rainfall over Indonesia ⓘ
relatedTo	Indian Ocean Dipole self-linksurface differs ⓘ surface form: Indian Ocean Basin Mode
relevantFor	drought risk assessment in Australia ⓘ flood risk assessment in East Africa ⓘ seasonal climate prediction ⓘ
studiedBy	climatologists ⓘ meteorologists ⓘ oceanographers ⓘ
timeScale	interannual variability ⓘ

How these facts were elicited

Referenced by (9)

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

Southwest monsoon → influencedBy → Indian Ocean Dipole ⓘ

Northeast monsoon → modulatedBy → Indian Ocean Dipole ⓘ

East Asian summer monsoon → influencedBy → Indian Ocean Dipole ⓘ

Asian monsoon system → modulatedBy → Indian Ocean Dipole ⓘ

Indian Ocean circulation → affectedBy → Indian Ocean Dipole ⓘ

Indonesian Throughflow → modulatedBy → Indian Ocean Dipole ⓘ

tropical Indian Ocean → associatedWith → Indian Ocean Dipole ⓘ

this entity surface form: Indian Ocean Basin Mode

Indian Ocean Dipole → relatedTo → Indian Ocean Dipole self-linksurface differs ⓘ