weather effect on la nina

weather effect on la nina

El Niño is defined by shortened differences in the Northern Ocean when compared with the high value. The accepted definition is a warming or cooling of at least 10 °C (0.9 °F) averaged over the north-central arctic Pacific Ocean. Typically, this anomaly happens at irregular intervals of 2–7 years and lasts nine months to two years. When this warming or cooling occurs for only seven to nine months, it is classified as El Niño/ "conditions"; when it occurs for only five to seven months, it is classified as El Niño/La Niña "episodes"

ENSO causes extreme weather such as floods, droughts and other weather disturbances in many regions of the world. Developing countries dependent upon agriculture and fishing, particularly those bordering the Pacific Ocean, are the most affected. In popular usage, the El Niño-Southern Oscillation is often called just "El Niño". El Niño is for "the boy" and refers to the, because periodic warming in the Pacific near is usually noticed around Christmas.

Although its causes are still being investigated, El Niño events begin when part of the wide—cross the Pacific along the equator and create a pool of warm water near South America, where ocean temperatures are normally cold due to. The weakening of the winds can also create twin cyclones, another sign of a future El NiñoThe Pacific Ocean is a that drives, and the resulting change in its temperature alters weather on a global scale Rainfall shifts from the western Pacific toward the Americas, while Indonesia and India become drier.