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| Equatorial heating has a profound impact on the general circulation of the atmosphere. We examine north-south asymmetry in convection associated with the 20--90-day Madden-Julian oscillation (MJO) propagating across the Indo-Pacific warm-pool region, using satellite IR brightness temperatures and the ECMWF Interim Reanalysis. We show the predominantly antisymmetric MJO convection has a distinctly different origin over the Indian Ocean than its symmetric counterpart, as well as a drastically distinct propagation over the Maritime Continent. In particular, the asymmetric signal remains intact and strong while the symmetric signal becomes significantly diminished upon passage over the Maritime Continent. Implications of energy conversion associated with both signals will be discussed. |
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