If the Kelvin wave hits the South American coast ( specifically Ecuador ), its warm water gets transferred upward, which creates a large warm pool at the surface.
12.
However, observations suggest that the 1982 1983 El Ni�o developed rapidly during July 1982 in direct response to a Kelvin wave triggered by an MJO event during late May.
13.
Kelvin waves have been connected to El Ni�o ( beginning in the Northern Hemisphere winter months ) in recent years in terms of precursors to this atmospheric and oceanic phenomenon.
14.
For example, positive ( eastward ) anomalies in wind stress in the central Pacific excite positive anomalies in 20�C isotherm depth which propagate to the east as equatorial Kelvin waves.
15.
Both atmospheric and oceanic equatorial Kelvin waves play an important role in the dynamics of El Nino-Southern Oscillation, by transmitting changes in conditions in the Western Pacific to the Eastern Pacific.
16.
When the Rossby waves reach the western Pacific they ricochet off the coast and become Kelvin waves and then propagate back across the Pacific in the direction of the South America coast.
17.
El Nino, a characteristic warming of surface water in the tropical Pacific, occurs when westward trade winds weaken and the warm water mass, called a Kelvin wave, begins moving eastward along the equator.
18.
The phase speed is identical to that of coastal Kelvin waves, indicating that the equatorial Kelvin waves propagate toward the east without dispersion ( as if the earth were a non-rotating planet ).
19.
The phase speed is identical to that of coastal Kelvin waves, indicating that the equatorial Kelvin waves propagate toward the east without dispersion ( as if the earth were a non-rotating planet ).
20.
In addition to these two extreme subclasses, there are two special subclasses of equatorial waves known as the mixed Rossby-gravity wave ( also known as the Yanai wave ) and the equatorial Kelvin wave.
