La Niña
E22413
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.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| La Niña events | 1 |
| La Niña often defined when anomalies are below about −0.5 °C for several consecutive overlapping seasons | 1 |
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
climate phenomenon
ⓘ
phase of the El Niño–Southern Oscillation ⓘ |
| affects | global climate ⓘ |
| associatedWith |
cooler-than-average winters in parts of Canada
ⓘ
cooler-than-average winters in the northern United States ⓘ decreased central and eastern Pacific hurricane activity ⓘ drier-than-average conditions in parts of South America’s west coast ⓘ drier-than-average conditions in the southwestern United States ⓘ enhanced upwelling of cold water in the eastern Pacific ⓘ higher-than-average Southern Oscillation Index ⓘ increased Atlantic hurricane activity ⓘ lower-than-average sea surface temperatures in the Niño 3.4 region ⓘ reduced vertical wind shear over the tropical Atlantic ⓘ strengthened Walker circulation ⓘ stronger trade winds in the tropical Pacific ⓘ warmer-than-average conditions in the southeastern United States in winter ⓘ wetter-than-average conditions in Indonesia ⓘ wetter-than-average conditions in northern Australia ⓘ wetter-than-average conditions in parts of Southeast Asia ⓘ |
| causedBy |
enhanced upwelling of cold subsurface water in the eastern Pacific
ⓘ
stronger-than-average easterly trade winds ⓘ |
| characterizedBy |
unusually cold sea surface temperatures in the central equatorial Pacific Ocean
ⓘ
unusually cold sea surface temperatures in the eastern equatorial Pacific Ocean ⓘ |
| hasCategory |
climate variability
ⓘ
ocean–atmosphere interaction ⓘ |
| hasComponent |
atmospheric component
ⓘ
oceanic component ⓘ |
| hasOpposite | El Niño ⓘ |
| hasPhaseType | cool phase ⓘ |
| impacts |
agricultural yields in many regions
ⓘ
drought risk in other regions ⓘ flood risk in some tropical and subtropical regions ⓘ |
| influences |
mid-latitude jet streams
ⓘ
tropical cyclone activity ⓘ tropical rainfall patterns ⓘ |
| languageOfName | Spanish ⓘ |
| measuredBy |
Niño 3.4 index
ⓘ
Oceanic Niño Index ⓘ |
| monitoredBy |
Australian Bureau of Meteorology
ⓘ
National Oceanic and Atmospheric Administration ⓘ
surface form:
NOAA
World Meteorological Organization ⓘ |
| nameMeaning | the girl ⓘ |
| occursIn | tropical Pacific Ocean ⓘ |
| partOf | El Niño–Southern Oscillation ⓘ |
| possibleDuration | up to 2 years or more ⓘ |
| recurrenceInterval | every 2 to 7 years approximately ⓘ |
| relatedTo |
ENSO-neutral conditions
ⓘ
Southern Oscillation Index ⓘ |
| typicalDuration | 9 to 12 months ⓘ |
| typicalONIThreshold | ≤ −0.5 °C anomaly in Niño 3.4 region ⓘ |
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
La Niña events
this entity surface form:
La Niña often defined when anomalies are below about −0.5 °C for several consecutive overlapping seasons