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.
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 ⓘ |
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.