El Nino as a Consequence of the Global Oscillation in the
Dynamics of the Earth's Climatic System

V. I. Byshev, Corresponding Member of the RAS V. G. Neiman,
Yu. A. Romanov, and I. V. Serykh

Received February 2, 2012

Abstract—During study of the physical nature and potential precursor features of the El Niño phenomenon in
the Pacific, it was found that a negative large-scale temperature anomaly on the Indian Ocean surface may be
one of its significant precursors. This anomaly appears prior to the occurrence of El Niño and is accompanied
by growth in atmospheric pressure. It gradually extends eastwards along the equator until the zone of planetary
convection in the area of the Indonesian Region. The west wind that emerges on the eastern peripherals of the
mentioned pressure anomaly leads to reversal of the Pacific segment of the Walker equatorial atmospheric cir-
culation and to a subsequent change in the zonal thermal dipole polarity in the tropical zone of the Pacific (the
latter means culmination of the El Niño phenomenon). In addition to the mentioned thermobaric anomaly in
the Indian Ocean, other obvious signs of large-scale pressure anomalies have been found in the global atmo-
spheric pressure field; these anomalies may be interpreted as manifestations of the intradecadal global oscilla-
tion in the dynamics of the modern climatic system. It is suggested that the whole known complex of events
related to the El Niño phenomenon in the Pacific is a consequence and a regional link of the planetary structure
of this global atmospheric phenomenon.

10.1134/S1028334X12090012

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