Philander, S. G. H., and A. D. Seigel, 1985: Simulation of El Niño of 1982-1983. In Coupled Ocean-Atmosphere Models, Elsevier Oceanography Series, 40, Amsterdam; Elsevier, 517-541.
Abstract:A general circulation model of the ocean simulates El Niño of 1982-1983
with reasonable success and provides the following results. The massive
eastward transfer of warm surface waters from the western to the eastern
Pacific was accomplished by unusual eastward surface currents which, by
November 1982, extended from 9 degrees S to 9 degrees N across 120 degrees
W. Further east, the persistence of the southeast trades over the eastern
tropical Pacific inhibited eastward surface flow at, and to the south of
the equator at that time, but the eastward flow between 3 degrees and 8
degrees N penetrated right to the coast of Central America. The relaxation
of the trades and the changes in the curl of the windstress, that caused
the redistribution of heat in the upper ocean, occurred so gradually between
June and November 1982 that the response of the ocean was approximately
an equilibrium one. The zonal pressure gradient along the equator and the
intensity of the Equatorial Undercurrent, for example, decreased gradually
as the trade winds weakened. In December 1982, the anomalous eastward winds
west of the dateline suddenly changed to northerly winds. The westward pressure
force which the eastward winds had established was left unbalanced. This
excited an eastward travelling equatorial Kelvin wave which elevated the
thermocline and acclerated the equatorial currents westward. The wave front
dispersed downwards as it propagated eastward and there is no evidence of
its reflection at the South American coast affecting the surface layers
of the ocean. Eastward winds in the eastern equatorial Pacific Ocean in
March and April interrupted the recovery from El Niño and generated an intense
local eastward surface jet. The reappearance of the tradewinds in May 1983
signaled the end of El Niño and the gradual return to normal conditions.