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The FASTEX Data Base

.gif animation, it's as if you are on LeSuroit's quarterdeck.

What is it like to get a mid-latitude cyclone every other day? It's like this every day.

.gif animation from a film shot by G. Caniaux on board Le Suroît during FASTEX.

The data collected during this field experiment has been gathered into a Data Base: here. This critical task has been coordinated by the Toulouse Météo-France GAME group, but has involved all participants. This Data Base has been opened three-weeks after the end of operations to the scientific community at large (it is not restricted to FASTEX participants) on the INTERNET at the home page of the present site. This Data Base has many assets to offer to any person interested in mid-latitude cyclones: more than 10,000 high-resolution, checked, in situ soundings spread all along the storm-track (not just on its beginning or end), a remarkable collection of remotely sensed data and a full series of analyzed fields combining the obervations into a coherent set (Fig. J) are three examples.

The first scientific results will be published at the end of 1999 in a special issue of the Quarterly Journal of the Royal Meteorological Society. However, the scientific work on the data is currently going on and will so for a few years.

The electronic book available on this site provides some reference information on the field phase and shows some of the first results, especially those relating to the organization of the cloud systems.

Example of mesoscale structure in 4D VAR analysis Figure J: Vertical cross-section of the structure of a cloud system derived from the 4D-VAR data assimilation of dropsondes: a dry intrusion that is not in the initial guess field but in the measurements only is reasonably described. Result from the Météo-France group. (Figure from G. Desroziers, Météo-France).

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