High Resolution Numerical Weather Prediction Project
Website of the ALADIN Consortium

  After the 13rd PAC meeting and the 4th joint HAC/PAC meetings, Brussels, May 23

 After the Joint ALADIN/HIRLAM strategy meeting,Toulouse, April 26-28

 After the 26th ALADIN Wk & HIRLAM 2016 ASM

  • ALADIN 25th anniversary was celebrated during the icebreaker.

 Soon to come

The concept of the ALADIN project was proposed by Météo-France in 1990, with the aim of building a mutually beneficial collaboration with the National Meteorological Services of Central and Eastern Europe. This collaboration was to be in the field of Numerical Weather Prediction (NWP), which provides the basis for the forecasting tools of modern meteorology. The easy to translate acronym (Aire Limitée Adaptation dynamique Développement InterNational) clearly indicates the major axes of this project at its beginnings.

25 years later, as defined in the 5th Memorandum of Understanding,

The goal of the ALADIN Collaboration is to improve the value of the meteorological, hydrological and environmental warning and forecast services delivered by all Members to their users, through the operational implementation of a NWP system capable of resolving horizontal scales from the meso-beta to the meso-gamma scale and improving the prediction of severe weather phenomena such as heavy precipitation, intensive convection and strong winds.

This objective will be fulfilled through continuation and expansion of the activities of the ALADIN Consortium in the field of High Resolution Short Range Weather Forecast, including:

  • Maintenance of an ALADIN System (...);
  • Joint research and development activities, on the basis of the common Strategic Plan and related Work Plans, with the aim of maintaining the ALADIN System at scientific and technical state of the art level within the NWP community;
  • Sharing scientific results, numerical codes, operational environments, related expertise and know-how, as necessary for all ALADIN Consortium members to conduct operational and research activities with the same tools.

About one hundred scientists, from sixteen countries, each with its own specificity in resources and knowledge base, are permanently contributing to the progress of ALADIN NWP system. They are working together on a modern code of the atmosphere that definitely deserves its proper place between the European state-of-the-art NWP models: 80 Full-Time Equivalent persons in the last years of the project’s life. This code is now operated every day in fifteen Euro-Mediterranean countries, on a huge variety of computing platforms ranging from a PC Cluster under Linux to Vector Computers.

ALADIN consortium had a number of unique successes in the past : for instance, the plugging of an existing physics parameterization in the existing code, leading to the AROME model; ALADIN is at the forefront of the gray-zone problematics with the ALARO physics; ALADIN dynamical core is remarkably stable; ...

ALADIN also allowed to build a high-level scientific team, distributed in sixteen countries that managed to reach the level of the best research centres, as witnessed by the PhD theses and publications in international journals. The General Assembly of Partners, the workshops, the meetings, the newsletters regularly offer opportunity of various exchanges within the ALADIN community.

ALADIN is preparing for the serious evolutions expected within the NWP landscape in the coming five to ten years. There is the ever-lasting question where to draw the line between resolved vs. parameterized processes. There is the question of the efficiency and the scalability of ALADIN dynamical core. There are the external drivers, such as the demands of the end users, and the evolution of the high-performance computing machines. Additionally a serious reorganization of the code is now at hand, in particular within the OOPS project. Besides that, the international meteorological context is steadily changing, specifically with the merger of the ALADIN and the HIRLAM consortia.

Article published on 4 April 2016
dernière modification le 18 August 2016
Section : ALADIN annual workshops (joint with HIRLAM ASM from 2007)
26<sup class=th WK & ASM 2016: participants at the opening session" title="26th WK & ASM 2016: participants at the opening session" />
The Instituto Português do Mar e da Atmosfera (Portugal) hosted the joint 26th ALADIN Wk & HIRLAM 2016 ASM. The major meeting was held at the hotel TRYP Lisboa Aeroporto which is located on IPMA headquarters neighborhood. Agenda and participantsPresentations : documents and records The .pdf (...)
Article published on 4 April 2016
dernière modification le 5 August 2016
Section : About the aladin websites

After the 13rd PAC meeting and the 4th joint HAC/PAC meetings, Brussels, May 23After the Joint ALADIN/HIRLAM strategy meeting,Toulouse, April 26-28After the 26th ALADIN Wk & HIRLAM 2016 ASM

The Instituto Português do Mar e da Atmosfera (Portugal) hosted the joint 26th ALADIN Wk & (...)

Article published on 19 April 2016
Section : ALADIN annual workshops (joint with HIRLAM ASM from 2007)

The joint 27th ALADIN Wk & HIRLAM ASM 2017 will be held on the premises of the Finnish Meteorological Institute in Helsinki (see How to find FMI during the first week of April 2017 : 3-6 April :joint Wk& ASM, 7 April : HMG/CSSI meeting.

Some side meetings will also take place during (...)

Article published on 19 April 2016
dernière modification le 24 May 2016
Section : Scientific Management Meetings

A joint ALADIN/HIRLAM strategy meeting was held in Toulouse on April 26-28, 2016 from noon to noon. Scope and objectives of the workshop

The Aladin and Hirlam cooperation on limited area mesoscale weather forecasting de facto involves 26 countries now. The systems are growing in (...)

Article published on 25 April 2016
dernière modification le 26 April 2016
Section : Scientific Management Meetings

The ALADIN Committee for Scientific and System/maintenance Issues (CSSI) and Support Team (ST) members meet at least once a year.

A coordination meeting with HIRLAM Management Group (MG) takes place in spring besides the annual joined ALADIN workshop & HIRLAM All Staff Meeting; another (...)

Article published on 9 May 2016
Section : History
During the icebreaker at the joint 26th ALADIN Wk & HIRLAM ASM 2016 in Lisbon (4-7 April 2016), the ALADIN 25th Anniversary was celebrated. Piet recalled some main steps and achievements of the ALADIN consortium throughout all these years and insisted of the ALADIN spirit that lead so many (...)
by JAM , Eric
Article published on 3 June 2016
Section : Stay reports
ZSEBEHAZI G.: SENSITIVITY STUDY FOR SZEGED, HUNGARY USING THE SURFEX/TEB SCHEME COUPLED TO ALAROBENAMARA M.: Premier essai d’Optimisation du code srtm (courte longueur d’onde) dans ARPEGE dans le cycle 41t1_op1Khalfaoui W.: Évaluation des modifications sur la Microphysique de AROMEBochenek B.: (...)
Article published on 9 June 2016
Section : ALADIN annual workshops (joint with HIRLAM ASM from 2007)

The joint 28th ALADIN Wk & HIRLAM ASM 2018 will be held on the premises of Météo-France in Toulouse during the third week of April 2018 :

16-19 April :joint Wk& ASM,

20 April : HMG/CSSI meeting.

Some side meetings will also take place during that week, as well as the usual (...)

Article published on 16 June 2016
Section : (General) Assembly of ALADIN Partners
The National Met Services of the ALADIN, HIRLAM and LACE consortia will take the opportunity of many of their Directors gathering in Darmstadt for the EUMETSAT Council next December to organise the general assembly and councils : the LACE Council on December 7 afternoon the HIRLAM Council (...)
by Eric
Article published on 17 June 2016
Section : Stay reports
SATOURI A.: Phasing report COOPMANN O. Amélioration des analyses météorologiques par l’assimilation de mesures infrarouges satellitaires sensibles à l’ozone (M2)
Article published on 31 July 2016
dernière modification le 1 August 2016
Section : Policy Advisory Committee (PAC) and "Bureau" meetings
Group photo of the 1<sup class=st Joint HAC/PAC" title="Group photo of the 1st Joint HAC/PAC" />
Since the 3rd MoU (November 2005), the governance of the ALADIN project is under the responsability of the General Assembly (GA) who designs the Policy Advisory Committee (PAC). The PAC meets before each GA [1] : the Minutes of the PAC meeting are one of the preparatory documents of the GA. See (...)
Article published on 9 August 2016
dernière modification le 10 August 2016
Section : PhD thesis
J-P Chaboureau, C. Fischer, M. Mokhtari and B. Hamadache (from right to left); P. Tulet (behind)
PhD Thesis completed in the framework of the ALADIN project (excepted those on RFR or ALATNET supports) Name Title of the thesis Date of defense University Vanja BLAZICA Divergence in limited area models for numerical weather prediction 27 September 2013, Ljubljana (Slovenia) Ljubljana (...)

Graphics of the participation in the ALADIN project, figures as on 30 June 2015
Article published on 2 December 2015
by Patricia by

Statistics about the manpower involved in ALADIN are regularly produced thanks to the ALADIN work accounting realized by the LTM (ALADIN correspondents) following the rules defined in the MoU.

The statistics below were prepared at the end of MoU4, for the 20th General Assembly and the MoU5 signature.

 Breakdown of the manpower at the end of June 2015 and during Mo4

All Partners significantly contributed to the manpower, even if the accumulated data since 1991 may give a distorted view for the last countries to join ALADIN.

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Person.month cumulated since 1991
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Person.month during MoU4

 Manpower changes during time

The accumulated manpower investment since the start of ALADIN in 1991 is equivalent to 51.4 FTE (about 89 FTE during MoU4 years), with more work being done by "key" persons, working mostly full-time on ALADIN

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Evolution of the quartely manpower
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Effort, FTE and mean partial time


82% of the total manpower invested in ALADIN since 1991 was realized by permanent staffs in their NMSs, the mobility showing a long-term decrease (with more increased possibilities for virtual mobility, through tele- web- or video- conferencing).
Whereas historically strong exchanges within LACE contries or on a bilateral basis between some flat-rate Partners and Meteo-France exist, the flat-rate mechanism does facilitate the scientific visits involving flat-rate Partners

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Stay versus home work in the total ALADIN effort
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Mobility when versus before the FR mechanism
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Part of the mobility funded by FR mechanism

 Manpower evolution of Partners or Components of the consortia

Since 1991, the manpower was done at 36% by LACE, 35% by Meteo-France and 29% by the flat-rate Partners, with differences in this breakdown according to the MoUs periods. The investment by each Partner is also changing depending on the evolution of the local staffs dedicated to ALADIN

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MF, LACE and FR partners manpower
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Evolution of Partners manpower during MoUs

 Type of work at the end of June 2015

Since July 2001, the ALADIN effort is split in 3 categories (direct work, maintenance of local applications, development of interfaces to other applications). The type of work is also characterized (training, tuition, networking,maintenance, validation, development, operational). Since January 2007, the manpower is also split in "in-kind" or "not in-kind" work. Since January 2012, the manpower invested has been scrutinized through additional criteria (code design and parallelization).

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Type of work
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Type of work (2)

 Statistics on phasing effort

During MoU4 period, many Partners participated in the phasing effort in Toulouse and sent solid phasers teams, with people who had been working hard and well.

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Phasing participation per year
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Phasing effort by Partners during MoU4 versus total effort


Informations for Toulouse visitors
Here are a few information for future or present visitors in Toulouse : (...)
operala mailing list

This list has been created in order to keep in touch (...)

Operational configurations

(updated on March 11, 2016)

Within ALADIN and HIRLAM Consortia, the ALADIN, (...)

Joint ALADIN-HIRLAM Newsletters
During the HMG/CSSI meeting in April 2013, ALADIN and HIRLAM consortia (...)

Some photos
at random

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