ALADIN
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


 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 10 February 2016
dernière modification le 11 February 2016
Section : Memorandum of Understanding

The 5th ALADIN MoU was signed in Budapest on February 10, 2016 during the 20th ALADIN General Assembly.

The differences from the 4th MoU concern : the introduction of the notion of Canonical Model Configurations (i.e. AROME or ALARO) the new half-time ALADIN funded position for a Code (...)

Article published on 4 April 2016
dernière modification le 16 June 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 16 June 2016
Section : About the aladin websites
26<sup class=th WK & ASM 2016: ALADIN anniversary at the icebreaker" title="26th WK & ASM 2016: ALADIN anniversary at the icebreaker" />

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 15 June 2016
dernière modification le 16 June 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 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)








Assimilation and analysis (current status)
Article published on 3 July 2009
by JFM by

Model parameters ALADINCOSMOHIRLAM/HARMONIEUM/JULESECMWF
Soil temperature and water content Optimum interpolation based on screen-level analysis increments of T and RH 2-dimensional (vertical and temporal) variational technique using 2-m temperature analyses at 12 and 15 UTC
Analysed variables : soil moisture of the top 5 soil layers (0-81 cm) at 00 UTC
Optimum interpolation based on screen-level analysis increments of T and RH Errors in forecasts of screen T and RH used to calculate increments to soil moisture. NAE and M4 use UKPP over UK and interpolated global SMC elsewhere
Level 1 T atmospheric increments applied to top soil level in absence of snow
EKF for soil moisture and OI for soil/snow temperatures based on screen-level analysis increments of T and RH
Sea surface temperature Optimum interpolation using surface observations with a relaxation towards OSTIA SST analysis Correction method. Background field from GME SST analysis using NCEP 0.5°x0.5° SST analysis that includes satellite data. Observations from SYNOP-SHIP and BUOY. OI (HIRLAM) - interpolation from OSTIA (HARMONIE) Interpolated from OSTIA analysis Aggregation of OSTIA SST products based on surface observations and satellite products
Sea-ice extent Derived from sea-ice concentration (used only to update sea-ice temperature) Sea ice cover analysis from BSH (German Institute for shipping and hydrology) for the Baltic sea. Resolution lon/lat : 0.167x0.1 degrees, NCEP analysis in other areas Taken from OSISAF Interpolated from OSTIA analysis Aggregation of OSTIA and NCEP sea-ice products which are the OSI-SAF products (from SSM/I data)
Sea-ice temperature From BSH and NECP analyses Interpolated from ECMWF analyses
Snow depth Background values with relaxation towards climatology from the global model ARPEGE Correction method. Used data : background values from COSMO model, snow depth observations from SYNOP stations, present and past SYNOP weather, precipitation amount, 2-m temperature analysis (+model prediction). Monthly snow depth, climatology from ECMWF for permanently glacial covered areas OI based on in-situ measurements Model values corrected using IMS mask and use of background info OI analysis using surface observations (SYNOP+national networks)+ use of 4km NOAA/NESDIS snow cover extent to correct snow depth observations
Lake Closest point from SST analysis (using NCEP 0.5° for large lakes) Flake values from last forecast FLake + OI from LST observations (Finland, SYKE) Climatology or nearest SST Great lakes : interpolation of the NCEP SST products. Other lakes: SST derived from T2m climatology from Legates and Wilmott (1990)
Vegetation None None None Seasonal LAI climatology derived from MODIS data LAI climatology derived from MODIS data

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