DYNAMO logo Dynamics of the Madden-Julian Oscillation Experiment

CSU Mesoscale Dynamics Group
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★ NOTE: ★
The latest versions of final products (sounding data, gridded datasets, and array averages) are now available at the website for the DYNAMO Legacy Data Project.

General Information:
  • These data products were created by objectively analyzing upper-air soundings and other data sources onto a regular 1-degree, 25-hPa grid using multiquadric interpolation. The gridded data fields were then averaged over the Northern Sounding Array (NSA) and the Southern Sounding Arrays (SSA).
  • The Northern Sounding Array (NSA) and the Southern Sounding Array (SSA) are defined by the following sites:
    Sounding Array Boundary Sites Lat Lon
    NSA Colombo 6.91 N 79.87 E
    Revelle 0.10 N 80.50 E
    Gan 0.69 S 73.15 E
    Malé 4.19 N 73.53 E
    SSA Revelle 0.10 N 80.50 E
    Mirai 8.00 S 80.50 E
    Diego Garcia 7.35 S 72.48 E
    Gan 0.69 S 73.15 E
  • Note that the two ships (the Revelle and Mirai) actually moved slightly over time from their nominal positions indicated above. It was these nominal positions, however, that were used to define the averaging areas for the two sounding arrays.
  • Vertical info: 25 hPa resolution from 1000 to 50 hPa plus surface
  • Temporal info: every 3 hours (00, 03, 06, 09, 12, 15, 18 and 21 UTC) for 1 Oct. thru 31 Dec. 2011
  • These products are available as simple ASCII text files. See one of the Readme files below for important information regarding data sources, file formats and references.
  • The following array-averaged products are available:
    • Basic fields (z, u, v, omega, T, theta, q, rh, div, and vort).
    • Large-scale forcing fields (i.e., advective tendencies of T and q).
    • Q1 and Q2 (i.e., apparent heat source and moisture sink).
    • Moist static energy (MSE) terms (complete form with g*z in tendency and horizontal advection terms).
    • Moist static energy (MSE) terms (based on primitive equations with no g*z in tendency or horizontal advection terms).
    • Dry static energy (DSE) terms.
    • Budget-derived quantities (rainfall and <Qr> which is column integrated net-radiation) along with surface latent and sensible heat WHOI fluxes at daily resolution and 3-hourly CERES <Qr>.
    • TRMM 3-hourly rainfall estimates (based on the 3B42v7 product) averaged over various regions.
  • DYNAMO map (map_dynamo.png) and visual sounding inventory (invent_vis.png) are shown below.

Version 3a:

Version 3b:

Map of DYNAMO Sounding Network Upper-air sounding network for DYNAMO/CINDY/AMIE. Polygons show areas over which gridded analyses were averaged.

Visual DYNAMO Sounding Inventory Visual sonde inventory of upper-air data for six core sites based on Level 4 data (i.e., 5-hPa interpolated). Each line of dots represents a successful sounding. Larger missing data gaps at RV Revelle and Mirai are the result of ship port calls. Analyses are most reliable when ships are on-site.