Moist Static Energy budget for Madden-Julian Oscillation like disturbances in Super-Parameterized CAM on an aquaplanet

by Joe Archive on May 17, 2010

This poster was presented at the American Meteorological Society Hurricanes29  Conference in Tucson AZ last week (May 13 ’10).

Image links to full resolution PDF of the poster. One important correction/clarification/point: the anomalies shown in figures 4 and 5 are regressions coefficients of the fields on to the MJO filtered OLR at the point of maximum filtered OLR variance. The units for these anomalies are J/m2 or W/m2 per W/m2 of the filtered MJO OLR signal.

Abstract: The equatorial atmospheric variability shows a spectrum of significant peaks in the wave number-frequency domain. While most of these peaks have been identified with the equatorially trapped wave modes of rotating shallow water wave theory, The Madden-Julian Oscillation (MJO) appears as a very strong signal at zonal wave numbers 1–7 and periods of 30–100 days.
It has been suggested that the MJO is instead a “moisture mode” where the humidity is the driving field of the dynamics.
In order to investigate this hypothesis, we will present a Moist Static Energy budget and for the MJO-like signal in Super Parameterized CAM (SP-CAM) on an aquaplanet, in a fashion very similar to Maloney 09.

I will add my “spiel” later, once I run through it in my head a couple of times and smooth it out as a printed version.

All-in-all, I think the poster was well received – I got some very nice comments from a few people who’s praise I value and had some useful discussions with a few people who are doing similar work.

I’ll also try to post some summaries of the talks I found most interesting over the next little while – assuming I can read the notes I scrawled down as I watched them…

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