ONI
E504839
ONI is a standardized climate index used by meteorologists to monitor and quantify the strength of El Niño and La Niña events based on sea surface temperature anomalies in the central equatorial Pacific.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
El Niño–Southern Oscillation index
ⓘ
climate index ⓘ |
| appliesTo | tropical Pacific Ocean ⓘ |
| basedOn | sea surface temperature anomalies ⓘ |
| dataSource |
NOAA ocean temperature datasets
ⓘ
observed sea surface temperatures ⓘ |
| definedBy |
NOAA Climate Prediction Center
NERFINISHED
ⓘ
National Oceanic and Atmospheric Administration NERFINISHED ⓘ |
| expressedIn | degrees Celsius ⓘ |
| fullName | Oceanic Niño Index NERFINISHED ⓘ |
| hasCategory |
moderate El Niño
ⓘ
moderate La Niña ⓘ strong El Niño ⓘ strong La Niña ⓘ very strong El Niño ⓘ weak El Niño ⓘ weak La Niña ⓘ |
| hasTimeScale | 3-month running mean ⓘ |
| helpsAssess | global climate impacts of ENSO ⓘ |
| measuresRegion |
Niño 3.4 region
NERFINISHED
ⓘ
central equatorial Pacific ⓘ |
| monitors |
cold phase of ENSO
ⓘ
warm phase of ENSO ⓘ |
| partOf | NOAA ENSO monitoring system NERFINISHED ⓘ |
| quantifies |
ENSO phase
ⓘ
intensity of El Niño events ⓘ intensity of La Niña events ⓘ |
| relatedTo |
Multivariate ENSO Index
NERFINISHED
ⓘ
Southern Oscillation Index NERFINISHED ⓘ |
| requiresDurationForEventClassification | at least five consecutive overlapping 3-month periods ⓘ |
| standardizedBy | NOAA NERFINISHED ⓘ |
| supports |
declaration of El Niño conditions
ⓘ
declaration of La Niña conditions ⓘ |
| temporalResolution | monthly (reported as 3‑month means) ⓘ |
| thresholdForElNino | +0.5 °C anomaly ⓘ |
| thresholdForLaNina | −0.5 °C anomaly ⓘ |
| typeOfAnomaly | sea surface temperature anomaly relative to climatology ⓘ |
| usedBy |
climate monitoring agencies
ⓘ
climatologists ⓘ meteorologists ⓘ |
| usedFor |
monitoring El Niño events
ⓘ
monitoring La Niña events ⓘ quantifying ENSO strength ⓘ |
| usedIn |
ENSO diagnostics
ⓘ
operational climate monitoring ⓘ seasonal climate outlooks ⓘ |
| usedSince | late 20th century ⓘ |
| usesBaselinePeriod | 30-year climatological average ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.