6D.6 MJO signals in latent heating

Tuesday, 29 April 2008: 11:30 AM
Palms I (Wyndham Orlando Resort)
Chidong Zhang, Univ. of Miami/RSMAS, Miami, FL; and S. M. Hagos, W. K. Tao, and S. E. Lang

It has been proposed that the vertical structure of latent heating undergoes a systematic change through the life cycle of the Madden-Julian Oscillation (MJO), with low-level heating preceding deep, top-heavy heating during convectively active phases. This perception has been derived from estimates of diabatic heating based on limited observations from a special field campaign (TOGA COARE) and estimates using global reanalysis products. Recent development of TRMM latent heating data provides a unique opportunity to investigate this issue using remote sensing products. In this study, MJO signals are derived from multi-year latent heating profiles of TRMM without reference to any other variable. The existence of such signals signifies the central role of latent heating in the dynamics of the MJO.
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