Southern Oscillation
E22959
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.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
atmospheric oscillation
→
climate phenomenon → |
| abbreviatedAs |
SOI when referring to its index
→
|
| affects |
global climate
→
global rainfall patterns → global weather patterns → tropical Pacific Ocean → |
| alsoKnownAs |
SO
→
|
| causes |
anomalies in surface air temperature patterns
→
shifts in tropical rainfall belts → |
| characterizedBy |
fluctuations in sea-level air pressure
→
pressure differences between eastern and western tropical Pacific → |
| discoveredBy |
Gilbert Walker
→
|
| drives |
El Niño events
→
El Niño–Southern Oscillation climate variability → La Niña events → |
| hasComponent |
negative phase
→
positive phase → |
| impactOn |
agricultural productivity in affected regions
→
fisheries in the Pacific → hydrological cycles → |
| influences |
drought occurrence
→
flood occurrence → monsoon systems → sea surface temperature patterns in the Pacific → tropical cyclone activity → |
| linkedTo |
Pacific trade winds variability
→
changes in Walker circulation strength → |
| measuredBy |
Southern Oscillation Index
→
|
| monitoredBy |
global climate monitoring agencies
→
national meteorological services → |
| partOf |
El Niño–Southern Oscillation
→
|
| phaseAssociatedWith |
El Niño in its negative phase
→
La Niña in its positive phase → |
| quantifiedBy |
pressure difference between Tahiti and Darwin
→
|
| region |
tropical Pacific
→
|
| relatedTo |
El Niño
→
La Niña → Walker circulation → |
| scale |
large-scale atmospheric pattern
→
|
| studiedIn |
climatology
→
meteorology → |
| temporalPattern |
irregular cycle of several years
→
|
| timescale |
interannual variability
→
|
| usedFor |
drought forecasting
→
flood risk assessment → seasonal climate prediction → |
Referenced by (2)
| Subject (surface form when different) | Predicate |
|---|---|
|
El Niño–Southern Oscillation
→
|
isAssociatedWith |
|
Southern Oscillation Index
→
|
namedAfter |