Tropical Tropospheric Biennial Oscillation and ENSO
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The tropospheric biennial oscillation (TBO) and El Nino-Southern Oscillation (ENSO) are interannual variations that affect the Asian-Australian monsoon region and the tropical Pacific. Some investigators view the two oscillations are actually one system, with TBO a “weaker sister” of ENSO. Others view the two as separate modes, with TBO primarily driven by the monsoon and ENSO primarily driven by atmosphere-coupling of the tropical eastern Pacific. In this paper the Chang-Li theory, which belongs to the latter category, is used as the basis to study the interactions of the two oscillations. It is shown that the nonlinear interaction of the two modes may produce a variety of solutions that may explain the complexity of the observed monsoon-ENSO relationship.
Selected Papers, 4th Conference on East Asia and Western Pacific Meteorology and Climate, World Scientific Series on Meteorology of East Asia. Vol. 1, 159-171pp.(Manuscript)