DYNAMO — CSU

Dynamics of the Madden-Julian Oscillation Experiment

CSU Mesoscale Dynamics Group

Ensemble Datasets

Gridded ensemble datasets:

Version 3a
- Based on observations only; no supplemental model analysis.
- netCDF Data Files (directory containing 2 netCDF files for each ensemble member)
- Each netCDF file is approximately 540 MB in size, so we have not tarred them all together, but recommend using wget to grab them.
- Readme file for the "normal" (unperturbed) version 3a gridded product.

Version 3b
- Based on observations supplemented with ECMWF OA.
- netCDF Data Files (directory containing 2 netCDF files for each ensemble member)
- Each netCDF file is approximately 540 MB in size, so we have not tarred them all together, but recommend using wget to grab them.
- Readme file for the "normal" (unperturbed) version 3b gridded product.

Array-averaged ensemble datasets:

General info:

Released: 10 Mar 2015
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:

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
20 member ensemble plus a 00-member (the unperturbed case). See the Readme file for the ensemble datasets (below) for more information.
There are 2 versions of the array-averaged ensemble datasets (see below). For both regions (NSA and SSA) within each version, there are 4 compressed simple ASCII text files for each ensemble member:
- fields.area_member.gz: Basic fields (z, u, v, omega, T, theta, q, rh, div, and vort)
- lsf.area_member.gz: Large-scale forcing fields (i.e., advective tendencies of T and q)
- q1q2.area_member.gz: Q1 and Q2 (i.e., apparent heating and apparent drying
- eopo.area_member.gz: Budget-derived quantities
Readme file for the ensemble datasets.
PowerPoint summary presentation for the ensemble datasets.

Version 3a
- Based on observations only; no supplemental model analysis.
- Data Files for NSA (tar file containing all version 3a data files for NSA region)
- Data Files for SSA (tar file containing all version 3a data files for SSA region)
- Readme file for the "normal" (unperturbed) version 3a array-averaged product (includes file format information).

Version 3b
- Based on observations supplemented with ECMWF OA.
- Data Files for NSA (tar file containing all version 3b data files for NSA region)
- Data Files for SSA (tar file containing all version 3b data files for SSA region)
- Readme file for the "normal" (unperturbed) version 3b array-averaged product (includes file format information).