La Niña
Today I learned
that LA NIñA is a coupled ocean-atmosphere phenomenon that is
the counterpart of El Niño as
part of the broader El
Niño-Southern Oscillation climate pattern.
During a period of La Niña, the sea surface
temperature across the
equatorial Eastern Central Pacific Ocean will
be lower than normal by 3–5 °C. In the United States, an episode of
La Niña is defined as a period of at least 5 months of La Niña conditions. The
name La Niña originates fromSpanish, meaning
"the girl," analogous to El Niño meaning "the boy."
La Niña, sometimes informally called "anti-El Niño", is the opposite of El Niño, where the latter corresponds instead to a higher sea surface temperature by a deviation of at least 0.5 °C, and its effects are often the reverse of those of El Niño. El Niño is famous due to its potentially catastrophic impact on the weather along both the Chilean, Peruvian, New Zealand, and Australian coasts, among others. It has extensive effects on the weather in North America, even affecting the Atlantic Hurricane Season. La Niña is often, though not always, preceded by an El Niño.
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