J9.4 A wind-partitioning analysis of the role of evaporation and horizontal moisture advection in the onset and evolution of the MJO

Wednesday, 11 July 2012: 4:15 PM
Essex Center/South (Westin Copley Place)
Ángel F. Adames-Corraliza, University of Washington, Seattle, WA; and J. Patoux and R. C. Foster
Manuscript (2.8 MB)

The role of evaporation and moisture advection in the onset and evolution of the MJO is investigated using a wind partitioning technique applied to the ERA-Interim dataset (1979-2011) within the tropical region. This technique separates the wind field into its irrotational, non-divergent and background components using free-space Green functions. We compare the relative contribution of each component to the advection of moisture within the boundary layer and free troposphere during MJO events. The wavenumber-frequency characteristics of each component are also explored and compared with surface fluxes. These results are then analyzed within the context of radiosonde launches from the ARM Madden-Julian Oscillation [MJO] Investigation Experiment (AMIE) and Dynamics of the Madden-Julian Oscillation (DYNAMO).

Supplementary URL: http://www.atmos.washington.edu/~angelf88/research.html

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