J8.3 The development of the diurnal warm layer and the ocean mixed layer during different phases of MJO, as observed by the iRobot Sea Glider

Wednesday, 11 July 2012: 2:00 PM
Essex Center/South (Westin Copley Place)
Dariusz B. Baranowski, University of Warsaw, Warsaw, Poland; and M. Flatau, A. Matthews, S. Chen, T. Jensen, and T. Shinoda

We show development of diurnal warm layer and its redistribution across mixed layer leading to Ocean Heat Content increase during suppressed phase of the Madden Julian Oscillation (MJO) and mixed layer modification following the active MJO convection. The data used in this study was collected by iRobot SeaGlider deployed from r/v Roger Revelle on Septemer 14, 2011 for DYNAMO/CINDY2011 . High vertical resolution in association with high sampling rate construct unique dataset of 5-months long subsurface measurements. The Sea Glider Data is supplemented with the coupled COAMPS forecast which were run daily during the DYNAMO intense observation period. Under weak wind conditions associated with the suppressed phase of MJO the observations indicate the large diurnal cycle of the warm layer temperature . The rainfall events can create the barrier layer which can prevent the upper warm layer from mixing with the cold water below, and influence the surface fluxes. COAMPS data are used to analyze the influence of these process on atmospheric convection.
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