What is La Nina in simple terms?
La Nina refers to the periodic cooling of ocean surface temperatures in the central and east-central equatorial Pacific. Typically, La Nina events occur every 3 to 5 years or so, but on occasion can occur over successive years. La Nina represents the cool phase of the El Nino/Southern Oscillation (ENSO) cycle.
What does La Nina weather mean?
The very simplified definition is this: La Nina is the cold phase of the El Nino – Southern Oscillation cycle, which is a naturally occurring fluctuation in ocean – atmosphere temperatures in the east central equatorial Pacific Ocean.
Does La Nina cause wind?
So what exactly is La Niña? The La Niña climate pattern is a natural cycle marked by cooler-than-average ocean water in the central Pacific Ocean. During La Niña events, trade winds are even stronger than usual, pushing more warm water toward Asia, NOAA said.
What is La Nina in geography?
La Niña is a phenomenon that describes cooler than normal ocean surface temperatures in the Eastern and Central Pacific Ocean, regions close to the equator off the west coast of South America. In some parts of the world, La Niña causes increased rainfall, while in other regions, it causes extreme dry conditions.
Is La Nina wet or dry?
What is La Niña? La Niña is a climate pattern that usually delivers more dry days across the southern third of the US. While the system was always associated with above average temperatures across the southern tier of the US, scientists have seen that pattern of warmer temperatures expand north.
Does La Niña mean more snow?
La Nina is one of two competing climate phenomena that make up the El Nino Southern Oscillation, ENSO. A moderate strength La Nina could lead to wetter than normal winter weather, which doesn’t directly mean more snow, but an increase in rain or snow for the winter.
What is the cause of La Niña?
La Niña is caused by a build-up of cooler-than-normal waters in the tropical Pacific, the area of the Pacific Ocean between the Tropic of Cancer and the Tropic of Capricorn. Unusually strong, eastward-moving trade winds and ocean currents bring this cold water to the surface, a process known as upwelling.
How is La Nina identified?
La Niña is characterized by unusually cold ocean temperatures in the Equatorial Pacific, compared to El Niño, which is characterized by unusually warm ocean temperatures in the Equatorial Pacific.
Is La Niña good for snow?
Snow is hard to predict, but experts say La Niña could bring increased snowfall over the Northwest, northern Rockies and Upper Midwest Great Lakes region. Parts of the Southwest, central-southern Plains and mid-Atlantic are likely to see less than usual.