High Resolution Numerical Weather Prediction Project
Website of the ALADIN Consortium
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August 21st 2018 : new edition of the ALADIN-HIRLAM Newsletter
The ALADIN/HIRLAM Newsletter n° 11 was published on August 21st, 2018
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Assemblies of the ALADIN and HIRLAM Directors
Information on the Regular 23rd General Assembly and 4th joint ALADIN GA and HIRLAM Council that were held in Zagreb on November 19-20, 2018.

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Participants : 23rd ALADIN GA

Regular 23rd General Assembly and 4th joint ALADIN GA and HIRLAM Council, Zagreb, November 19-20, 2018

The ALADIN GA and the HIRLAM Council met in Zagreb (Croatia) on November 19-20, 2018 : the 23rd ALADIN GA, then the LACE Council and the HIRLAM Council in parallel, then the 4th joint ALADIN GA - HIRLAM C meeting.
The minutes will be prepared soon and published on this site once approved by the participants. Meanwhile, below is a short summary :

  • The 3 PMs (ALADIN, HIRLAM, LACE) reported on the realisation of the Rolling Work Plan 2018 and presented some highlights on the common and R&D activities. The assemblies congratulated the Members for the good realisation of the Rolling Work Plan 2018 and approved the Rolling Work Plan 2019 and the committed manpower.
  • The assemblies approved the "scope document" they had tasked the WG (PMs, HAC/PAC chairs, MF PAC rep., CSSI chair) with: this document proposes a scope for the future single consortium. The assemblies gave the same WG guidelines to go further toward the single convergence and prepare a draft MoU, to be discussed at the next joint meeting of the ALADIN GA and HIRLAM C.
  • The "Tour d’ALADIN" was given by Piet : the slides are on-line : these 2018 highlights sent by the LTMs will be detailed in the ALADIN-HIRLAM Newsletter n°12, to be published end of January 2019.
  • Piet reported on the 2018 common activities, DA coordinator, Code Architect and ACNA activities (a document has also been published), DA coordinator, Code Architect, ACNA, ..
  • The ALADIN budget for 2019 was approved.
  • A new matrix of the ALADIN consortium was approved after changes in some positions (the GA chairs and vice-chairs were re-elected for a two-year period).

Last events

The minutes of the PAC and the HAC/PAC meeting have be approved by email and are on-line.

The presentations and posters are on-line on the SRNWP website.

An LTM meeting was held besides the EWGLAM/SRNWP and the minutes of this 25th LTM meeting have been published.

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The joint 28th ALADIN Wk & HIRLAM ASM 2018 was held mid-April on the premises of Météo-France in Toulouse.

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28th Wk&ASM 2018 : speakers
  • 4 full days (16-19 April) for the opening session, the thematic sessions, the posters session, some Working Group discussions, the LTM meeting, an official dinner and a public conference,
  • 20 April 2018 : HMG/CSSI meeting (whole day), for HMG/CSSI members only.

The agenda, the presentations - pdf files and videos of the sessions, the posters ... are on-line, the minutes of the LTM meeting and of the HMG/CSSI meeting are also on-line.

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28th Wk&ASM 2018 : PMs at the closing session

This joint Wk/ASM obtained the label "EuroScience Open Forum 2018 - TOULOUSE, EUROPEAN CITY OF SCIENCE".

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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 21 August 2018
Section : About the aladin websites
The ALADIN/HIRLAM Newsletter n° 11 was published on August 21st, 2018
Article published on 25 September 2018
dernière modification le 27 September 2018
Section : Software codes
History (reverse order) of the ALADIN cycles ALADIN cycle [1] with memorandum [2]available inMajor modifications introduced in the cyclebased on ARPEGE cyclePhasing team AL47T1 spring or autumn 2019 see the plans prepared for the 25th LTM meeting CY46T1 AL47 Jan-Mar 2019 see the plans (...)
Article published on 25 September 2018
Section : DATA Assimilation Strategic Core Program

4 June 2018 video-conference

See the summary report; the main topics of this video-conference were: 1. Status on the DAsKIT countries progress. 2. Preparation of the DAsKIT WD to be held in Romania, 19-21 September 2018 (see organization) 3. DAsKIT documentation web page - this page - (& (...)

Article published on 25 September 2018
Section : DATA Assimilation Strategic Core Program

DA coordinator position.

The 22nd ALADIN General Assembly approved the creation of a 20% DA coordinator position in ALADIN to assist the ALADIN PM and the CSSI : with the coordination of the ALADIN DA starter countries with their DA activities; with the coordination of the basic kit DA core (...)

by Patricia , JAM , Eric
Article published on 5 October 2018
Section : ALADINers
DIRECTION DE LA METEOROLOGIE NATIONALE Aéroport Casa-Anfa/Casa-Oasis BP 8106 20200 CASABLANCA - MAROC GMT + 1 PhotoSURNAMEfirstnameTELEPHONETELECOPYe-mail BARI DRISS 00 212 5 22 65 48 75 00 212 5 22 91 34 35 (...)
Article published on 15 November 2018
dernière modification le 21 November 2018
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 [3] : the Minutes of the PAC meeting are one of the preparatory documents of the GA. See (...)
Article published on 15 November 2018
Section : Software and applications
Vertical levels used in operational systems and their standard atmosphere heights

(updated on November 15, 2018)

Within ALADIN and HIRLAM Consortia, the 3 CMCs (ALARO, AROME, HARMONIE-AROME) and the ALADIN configuration run operationally on a wide range of computers, from single workstations to vectorial computers in shared or distributed memory, and on a cluster of (...)

Article published on 22 November 2018
Section : About the aladin websites
Information on the Regular 23rd General Assembly and 4th joint ALADIN GA and HIRLAM Council that were held in Zagreb on November 19-20, 2018.
Article published on 29 November 2018
Section : On-line registrations
Registration Form : Application Deadline: 15th February, 2019 Consult the list of participants Back to the main page of the 29th Wk & 2019 ASM
Article published on 3 December 2018
Section : ALADIN annual workshops (joint with HIRLAM ASM from 2007)

AEMET has kindly offered to host the joint 29th ALADIN Wk & HIRLAM ASM 2019 in Madrid. It will be organised on 1-4 April 2018 (Wk&ASM) and on 5 April (HMG/CSSI meeting).

The Main meeting will take place at the Headquaters of the Ministry for Ecological Transition in Nuevos Ministerios (...)

Article published on 4 December 2018
Section : (General) Assembly of ALADIN Partners

At the 4th joint ALADIN General Assembly and HIRLAM Council meeting, on the kind invitation of the Director of the TSMS, the assemblies decide to meet in Istanbul, according to the following schedule :

• 16 December 2019 afternoon : ALADIN GA,

• 17 December 2019 morning : LACE and HIRLAM (...)

Modelling components (current status)
Article published on 3 July 2009
by JFM by

surface energy balance Tile approach with separate energy budgets (sea/inland water/nature). One single surface temperature for the "nature" tile (bare soil/vegetation/snow) Surface temperature is area weighted average of temperature of snow covered and snow free surface fraction A tiled scheme with 5 tiles : water (sea+lakes), sea-ice, bare soil, low vegetation and forest (HIRLAM) ; Tile approach with sea/inland water/nature/town (HARMONIE) Tile scheme with 9 surfaces, or one aggregated surface. 9 tiles include 5 vegetation types, bare soil, urban, lakes and ice Tile approach with separate temperature and energy budget for each. Up to 8 tiles : 2 vegetations (low and high), 3 snow/ice (on bare soil, low and high vegetation), 2 water (ocean/lakes and interception)
coupling with the atmosphere Implicit (external) Explicit Explicit (HIRLAM) Implicit (HARMONIE) Implicit Implicit (internal)
Soil transfers 3-layer force-restore method ISBA scheme : 1st layer 1 cm / 2nd layer root zone (between 1 and 3 m) / 3rd layer recharge zone (between 0.5 and 1 m) 7-layer soil model. Layer depths between 1 cm and 14.58 m. Solution of the heat conduction equation Force-restore formulation ISBA (HIRLAM) 3-layer ISBA scheme (HARMONIE) 4 layer diffusion equation model for heat and Darcian flow for moisture 4-layer scheme (bottom depth : 7, 28, 100, 289 cm), based on Richards equation for soil water and diffusion equation for heat
Frozen soils 2 soil ice reservoirs (surface+deep) Temperature and soil type dependent computation of fractional freezing/melting of total soil water content in 6 active soil layers Explicit soil ice (HIRLAM) 2 soil ice reservoirs (HARMONIE) 4 layer scheme with phase changes Diagnostic function of temperature. Influences the hydraulic parameters
Vegetation One layer – Canopy resistance formulation for transpiration (Jarvis type) – interception reservoir One layer – Evapotranspiration after Dickinson (1984) – interception reservoir Surface resistance of Jarvis type. Intercepted water One layer – Canopy resistance formulation for transpiration (Jarvis type) – interception reservoir One layer – Canopy resistance formulation for transpiration (Jarvis type) and ISBA-Ags formulation for carbon fluxes – interception reservoir. Separate energy balance for each tile
Snow model One layer – prognostic variables : snow water equivalent, snow density, snow albedo One layer - prognostic variables : snow temperature, snow water equivalent, snow density, snow albedo Separate energy balance for snow pack and snow interception reservoir (HIRLAM) one layer no separate every budget (HARMONIE) Zero layer (uses top soil layer) – snow depth, albedo interception on needleleaf trees One layer – prognostic variable : snow water equivalent, snow albedo. Revised snow density and diagnostic liquid water storage
Lake model Prescribed surface temperature (analysis) FLake FLake (HIRLAM) and prescribed LST (HARMONIE) Saturated soil or high thermal inertia Prescribed surface temperature (analysis)
Sea-ice Prescribed surface temperature (analysis) Sea-ice model Fraction from analysis only, 2 layer ice model with prescribed depth (HIRLAM) no sea model (HARMONIE) Single layer thermodynamic model Fixed depth 4-layer model
Ocean model Prescribed surface temperature (analysis) – Charnock formulation for roughness – ECUME transfer coefficients Prescribed surface temperature (analysis) – Charnock formulation for roughness length None Prescribed surface temperature (analysis) – Adapted Charnock formulation for roughness length Prescribed surface temperature (analysis)
Urban areas Modified surface roughness, albedo, emissivity (rocks) Modified surface roughness, leaf area index, plant coverage Modified surface parameters (HIRLAM) and TEB model (HARMONIE) High inertia canopy None
Chemistry module None ART optional None None None
Surface boundary layer 5-layer scheme solving turbulent prognostic equations without advection Application of the turbulence scheme at the lower boundary and interative interpolation.
Roughness length for scalars implicitly considered by calculation of an additional transport resistance throughout the turbulent and laminar roughness layer
Monin-Obukhov similarity theory (HIRLAM) CANOPY scheme (HARMONIE) Monin-Obukhov similarity theory – explicit formulation of vertical profile Monin-Obukhov theory


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 November 15, 2018)

Within ALADIN and HIRLAM Consortia, the 3 (...)

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

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