High Resolution Numerical Weather Prediction Project
Website of the ALADIN Consortium

24th ALADIN GA and 5th joint ALADIN GA & HIRLAM Council, Istanbul, 16-17 December 2019

On the kind invitation of M. Volkan Mutlu Coşkun, Director General of Turkish State Meteorological Service, the ALADIN and HIRLAM Assemblies of Directors met In Istanbul, Turkey.
The main point at the agenda of these meetings was the Convergence : the Assemblies discussed the draft MoU of the future single Consortium and the pending issues (long-term goals, organisation and management positions, voting rules and voting rights, budget, roadmap, ...). The Minutes of the meetings are being validating and will be available by the end of January 2020.

HAC, PAC and joint PAC-HAC meetings, November 4-5, Toulouse

The agendas of these meetings were mainly focused on the ALADIN-HIRLAM convergence process and the documents prepared by the Convergence WG were scrutinized : draft MoU and convergence roadmap, proposal for a status of associated members, strategy and strategy meeting, management, organisational bodies and positions, quality assurance, financial scenarios, ... The PAC-HAC was also presented with the agendas of the next Directors meetings, the realisation of the Rolling Work Plan 2019 at mid-year and the proposed RWP2020.
The minutes of these meetings are on-line : the main PAC-HAC recommendations (on the future ALADIN-HIRLAM MoU draft text) have already been implemented by the Convergence WG and the documents amended accordingly to PAC-HAC discussions and distributed to the ALADIN & HIRLAM Directors for their meeting in Istanbul, December 16-17.

Code Training Working Week, 9-12 Sept 2019, Toulouse

The goal of these training days was to provide an updated information about the code structure, the specific guidelines for coding in new IFS cycles, and a reviewed vision of “how to think when coding for IFS/Arpège/LAM”.
The presentations of the Code Training Working Week are on-line.

23rd August 2019 : The ALADIN-HIRLAM Newsletter n°13 is on-ligne
It is mainly dedicated to the last joint ALADIN Workshop / HIRLAM ASM (Madrid, April 2019).

Enjoy !

AEMET host the joint 29th ALADIN Wk & HIRLAM ASM 2019 in Madrid on 1-4 April 2019 and the HMG/CSSI meeting on 5 April 2019 (see the minutes on-line). The LTM meeting was organised as a side-meeting on Monday late afternoon and the minutes are on-line.

The agenda is on-line, together with the pdf of the presentations and posters, and some WG minutes (see the Wk main page). The plenary sessions have been recorded and the videos are on-line

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.