Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Model description paper
07 Jul 2017
Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Geoscientific Model Development (GMD) and is expected to appear here in due course.
The ALADIN System and its Canonical Model Configurations AROME CY41T1 and ALARO CY40T1
Piet Termonia1,2, Claude Fischer3, Eric Bazile3, François Bouyssel3, Radmila Brožková4, Pierre Bénard3, Bogdan Bochenek5, Daan Degrauwe1,2, Maria Derkova6, Ryad El Khatib3, Rafiq Hamdi1, Ján Mašek4, Patricia Pottier3, Neva Pristov7, Yann Seity3, Petra Smolíková4, Oldrich Spaniel6, Martina Tudor8, Yong Wang9, Christoph Wittmann9, and Alain Joly3 1Royal Meteorological Institute, Brussels, Belgium
2Department of Physics and Astronomy, Ghent university, Ghent, Belgium
3Météo-France, Toulouse, France
4Czech Hydrometeorological Institute, Prague, Czech Republic
5Institute of Meteorology and Water Management – State Research Institute of Poland, Poland
6Slovak Hydrometeorological Institute, Bratislava, Slovakia
7Slovenian Environment Agency, Ljubljana, Slovenia
8Meteorological and Hydrological Service, Zagreb, Croatia
9Zentralanstalt für Meteorologie und Geodynamik, Vienna, Austria
Abstract. The ALADIN System is a numerical weather prediction system (NWP) developed by the international ALADIN consortium for operational weather forecasting and research purposes. It is based on a code that is shared with the global model IFS of the ECMWF and the ARPEGE model of Météo-France. Today, this system can be used to provide a multitude of high-resolution limited-area model (LAM) configurations. A few configurations are thoroughly validated and prepared to be used for the operational weather forecasting in the 16 Partner Institutes of this consortium. These configurations are called the ALADIN Canonical Model Configurations (CMCs). There are currently three CMCs: the ALADIN baseline-CMC, the AROME CMC and the ALARO CMC. Other configurations are possible for research, such as process studies and climate simulations.

The purpose of this paper is (i) to define the ALADIN System in relation to the global counterparts IFS and ARPEGE, (ii) to explain the notion of the CMCs and to document their most recent versions, and (iii) to illustrate the process of the validation and the porting of these configurations to the operational forecast suites of the Partner Institutes of the ALADIN consortium.

This paper is restricted to the forecast model only; data assimilation techniques and postprocessing techniques are part of the ALADIN System but they are not discussed here.

Citation: Termonia, P., Fischer, C., Bazile, E., Bouyssel, F., Brožková, R., Bénard, P., Bochenek, B., Degrauwe, D., Derkova, M., El Khatib, R., Hamdi, R., Mašek, J., Pottier, P., Pristov, N., Seity, Y., Smolíková, P., Spaniel, O., Tudor, M., Wang, Y., Wittmann, C., and Joly, A.: The ALADIN System and its Canonical Model Configurations AROME CY41T1 and ALARO CY40T1, Geosci. Model Dev. Discuss.,, in review, 2017.
Piet Termonia et al.
Piet Termonia et al.


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Short summary
This paper describes the ALADIN System that has been developed by the international ALADIN consortium of sixteen European and North African partners since its creation in 1990. The paper also describes how its model configurations are used by the consortium partners for their operational weather forecasting applications and for weather and climate research.
This paper describes the ALADIN System that has been developed by the international ALADIN...