Scientific & Technical visits
2026
| Visitor | Host | Topic | Report |
|---|---|---|---|
| Nour El Isslam Kerroumi, Météo Algérie, Algeria | RMI, Brussels, Belgium Rafiq HAMDI |
Surface Analysis and Modelling SU1.2.2: Sensitivity study on the initialization of TEB prognostic variables including a recycling of TEB to reduce the spin-up in high resolution urban simulation. |
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| Debasish Mahapatra, Royal Meteorological Institute of Belgium, Belgium | CHMI, Prague, Czech Republic Radmila Brozkova |
Physics Parametrizations In depth-evaluation of the two-moment scheme against observations in the tropics, interpretation of the results, and further incorporating the latest code changes. Work is planned with David Nemec at CHMI. |
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| David NEMEC, CHMI, Czech Republic | RMI, Ghent, Belgium Kwinten Van Weverberg |
Physics Parametrizations Development and validation of two-momentum microphysics with aerosols. The plan is to validate the scheme using disdrometer measurements, testing the scheme in cases of strong convection, and looking at details of individual processes. |
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| Mario Hrastinski, DHMZ, Croatia | CHMI, Czechia Petra Smolikova |
Towards modelling at (sub-)km resolution Study the vertical resolution increase and consequences in turbulence. |
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| Nika Kastelec, ARSO, Slovenia | CHMI, Prague, Czechia Petra Smolikova |
Dynamics Orographic terms in the linear part of the ICI time scheme. |
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| Natalia Szopa, IMGW, Poland | CHMI, Prague, Czechia Petra Smolikova |
Dynamics Sweep interpolations in the SL advection. |
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| Peter Elek, HungaroMet, Hungary | Météo-France, Toulouse, France Vivien Pourret |
Data Assimilation Find an optimal resolution for adaptive weighting for the Mode-S EHS data. Maybe also finishing backphasing to cy48t3 if time allows. |
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| Gabriel Stachura, IMGW-PIB, Poland | CHMI, Prague, Czech Republic Jan Mašek |
Surface Analysis and Modelling SU 3.9: Testing and validation of ALARO+SURFEX in 1 km resolution with various options used in SURFEX (for initialization and representation of snow) |
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| Piotr Sekuła, IMGW, Poland | CHMI, Prague, Czech Republic Jan Mašek |
Physics Parametrizations PH6 implementation work: Use of CAMS n.r.t. aerosol mass mixing ratios (MMRs) in the three CSCs. The workflow design should be general enough in order to make possible future use of alternative aerosol data (e.g. from MOCAGE). |
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| Mario Hrastinski, DHMZ, Croatia | CHMI, Prague, Czech Republic Petra Smolikova |
Physics Parametrizations Risk assessment of moving the lowest model level closer to the ground in surface-atmosphere coupling (PH7.6). Pioneering study using the ALARO CSC. |
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| Antonin Bucanek, CHMI, CZ | DHMZ, Zagreb, HR Mario Hrastinski |
Surface Analysis and Modelling ALARO + SURFEX surface DA workflow design. We would like to follow the MF interface LAEICS_SX and extend it for ISBA 3L force-restore scheme with 3 patches. |
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| Hdidou Fatima Zahra, DGM, Morocco | Météo-France, Toulouse, France | Preparations for assimilation of MTG data | |
| Alaoui Badreddine, DGM, Morocco | Météo-France, Toulouse, France | Generating initial conditions for AROME-EPS using deep learning | |
| Denis Haumont, RMI Belgium | Météo-France, Toulouse, France | FieldAPI interface to ectrans | |
| Rudolf Mård, FMI | Météo-France, Toulouse, France | Source-to-source translation tools | |
| Ulf Andrae, SMHI & Inger-Lise Frogner, MET Norway | AEMET Barcelona, Alfons Callado, Juan Jose Gomez-Navarro |
E8.7: Maintenance and evolution of the HarmonEPS system; E9.10: SPP will be further developed and extended in Harmonie. The goal is to provide the AEMET team support from experts for using SPP, and to make knowledge transfer to trigger active contributions to future SPP developments. |
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| Suzana Panezic | ARSO, Ljubljana, Benedikt Strajnar | DA 3.2: First steps towards using visible information from MSG with RTTOV visible operator and implementation of assimilation interface. Provide good description of albedo to screening and minimization. | |
| Ayoub Mehbali (ONM/Algeria) | Salomé Antoine (MF) | PH6.7: Plug the new ACLIB aerosol (incl dust) code library into AROME and its validation | |
| Zsófia Szálkai, HungaroMet | Clemens Wastl, GeoSphere Austria | E9.5/E11.4: Ensemble Forecasting and Predictability, implementation of surface perturbations into SPP via SURFEX in the C-LAEF system. to be done on C-LAEF or C-LAEF Alpe-Adria. Target cycle cy49 or higher. | |
| Issam LAGHA, Météo-Algérie | Benedikt Strajnar, ARSO, Ljubljana | DA1.2: Integration of Algerian automatic weather station (AWS) observations into the data assimilation system |
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| Hafsa Khaye, MarocMétéo (DGM) | Rafiq Hamdi, RMI, Brussels | SU5.5: SURFEX v8.1 with ECOCLIMAP-SG in AROME-Morocco | |
| Jáchym Ševčík,CHMI, Czech Republic | Stephanie Guedj,MET Norway, Norway | Refine the implementation of microwave data assimilation within the ALADIN/CHMI and investigate the impact of the dynamic estimation of surface emissivity and explore the retrieval of land surface temperature. | |
| David Nemec (CHMI) & Marie Mazoyer (MF) | Daniel Martín AEMET, Madrid | Attendance to the UWC WW Microphysics |
2025
| Visitor | Host | Topic | Report |
|---|---|---|---|
| Patrick Samuelsson, SMHI, Sweden | CHMI, Prague, Czech Republic | Surface Analysis and Modelling Collaboration in the use and development of SURFEX, including ALARO specific coupling with SURFEX (RWP2025 PH7.1), common missing components, e.g. tree height tuning (SU4.14) and optimisation of namelist settings. |
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| Gabriel Stachura, IMGW-PIB, Poland | Jan Mašek, CHMI, Prague, Czech Republic | Surface Analysis and Modelling snow schemes in SURFEX (usage with ALARO), |
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| David Nemec, CHMI, Czech Republic | Ghent University - RMI, Ghent/Brussels, Belgium | Physics Parameterizations Development of the two moment microphysics scheme in ALARO |
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| Martin Petrovic, SHMU, Slovakia | CHMI, Prague, Czech Republic | Data Assimilation Radar radial wind data assimilation Optimize the use of ground-based remote sensing observations (Radar – reflectivity and wind) from currently used sources and networks. |
report |
| Nika Kastelec, ARSO, Slovenia | Petra Smolikova, CHMI, Prague, Czech Republic | Dynamics Orography in the linear operator of the ICI time scheme |
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| Natalia Szopa, IMGW-PIB, Poland | Petra Smolikova, CHMI, Prague, Czech Republic | Dynamics Options for calculation of the X-term in vertical divergence variable |
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| Martin Petraš, SHMU, Slovakia | CHMI, Prague, Czech Republic | Meteorological Quality Assurance and verification Development of HARP |
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| Juan Jesus Gonzalez Aleman, AEMET (Spain) | MetNorway, Oslo (Norway) | Physics Parameterizations The work aims at merging the cloud tracking methodology used in verification with DDH. |
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| Nour El Isslam KERROUMI (ONM-Algeria, Algeria) | RMI (Belgium) | Surface Analysis and Modelling Test new setups at a higher resolution of 500 meters for both inline (operational run) and offline runs using SURFEX V8.1. |
report |
| Piotr Sekuła, IMGW, Poland | CHMI, Prague, Czech Republic | Physics Parameterizations Study the cloud/aerosol/radiation (CAR) interactions |
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| Debasish Mahapatra, Royal Meteorological Institute of Belgium, Belgium | Czech HydroMeteorological Institute, Prague, Czech Replublic | Physics Parameterizations Evaluation of the newly developed two-moment microphysics scheme at the CHMI for various locations (Europe, South America and Australia), against detailed meteorological measurements (including radar and disdrometer). |
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| Carlos Peralta, DMI, Denmark | GeoSphere Austria, Vienna, Austria | Meteorological Quality Assurance and verification further develop the verification of extreme events (MQA2.6) and implement the ideas in harp (MQA1.3). |
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| Alina Lerner-Vilu, ESTEA, Estonia | KNMI, De Bilt, The Netherlands | Data Assimilation The next step of the method of cloud DA is to incorporate the scheme in a 4D-Var setup to allow for a more accurate representation of the dynamic processes involved in cloud formation, movement, and dissipation. |
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| Chahrazed Bouzerma, Météo-Algérie | RMI, Belgium | 3DEnVar data assimilation with flow dependent errors covariances | report |
| Loic Maurin, Meteo-France | RMI, Belgium | Feasibility study of converting Surfex to gt4py DSL version | |
| Daan Degrauwe, RMI | CNRM/GMAP Meteo France, Toulouse, France Fabrice Voitus |
Possible use of Atlas for grid-point horizontal derivative | |
| Martin Frølund, DMI & Xiaohui Zhao, IMO | James Fannon, MetEireann, Ireland | EPS Use of URANIE for parameter sensitivity analysis. URANIE is a useful tool for development of SPP, but with a shortage of manpower. Introduction for two newcomers would be highly appreciated |
report |
| Rolf Heilemann Myhre, MetNO | Meteo-France, Toulouse, France | Refactoring/GPU porting of AROME/HARMONIE-AROME parameterizations | |
| Ole Lindberg, DMI | Meteo-France, Toulouse, France | Refactoring/GPU porting of AROME/HARMONIE-AROME parameterizations, or work on radiation scheme in coarse grid ECRAD on coarse grid, collaboration with GMAP and GMME teams (Sophia) |
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| Denis Haumont, RMI | Meteo-France, Toulouse, France | FIELD_API interface for spectral transforms | |
| Michiel van Ginderachter, RMI | James Fannon, MetEireann, Ireland | EPS Further development of URANIE in HarmonEPS and/or MUSC |
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| Daniel Santos (DMI) | Meteo-France, Toulouse, France | Technical training visit to an ACCORD team | |
| Laura Magyar, HungaroMet, Hungary | CHMI, Prague, Czech Republic | Data Assimilation Radar reflectivity assimilation, the host is using ALARO in operations, while the guest country employs AROME operationally, this is a solution that is to be applicable for both (all?) CSCs. |
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| MEHBALI Ayoub, (ONM) | Météo France (Toulouse- France) | Physics Parameterizations PH6.7: Develop, maintain and evaluate the dust modeling function. Algeria makes a regular evaluation of AROME-DUST in cooperation with MF. |
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| Leif Denby (DMI) | Jelena Bojarova (SMHI) | Building ML-friendly data infrastructure [DA9] | |
| Fatima Hdidou (DGM) | CNRM/GMAP Meteo France, Toulouse, France (Patrick Moll) |
Impact study of GNSS zenital delay gradients in 3D-VAR and in 3D-EnVar (DA2.2) | |
| Badreddine Alaoui (DGM) | CNRM/GMAP Meteo France, Toulouse, France (Olivier Nuissier) |
Using AI for clustering AROME-EPS coupling data over Morocco (or Overseas domain), and assessing the impact of the coupling data on EPS members (E6) | |
| Rudolf Mård, (FMI) | CNRM/GMAP Meteo France, Toulouse, France (Erwan Cossevin) |
Source-to-source translation: conversion of fxtran scripts to loki | |
| Adhithiyan Neduncheran, GeoSphere Austria, Austria | Philippe Chambon, CNRM/GMAP Meteo France, Toulouse, France |
Continuation of work on assimilation of MTG FCI in AROME (mainly IR channels in all-sky mode). | |
| Peter Elek, HungaroMet, Hungary | Vivien Pourret, CNRM/GMAP Meteo France, Toulouse, France |
Backphasing the development of Vivien Pourret (on adapting weighting Mode-S EHS data) to AROME/HU cy46t1_bf07, developments of thinning | report |
| Meto Shapkalijevski, SMHI, Sweden | ECMWF | Participation in the 50year event and presentation about surface/atmosphere coupling, on behalf of ACCORD |
2024
| Visitor | Host | Topic | Report |
|---|---|---|---|
| Daniel Santos | IPMA | IAL Git & Github + bundlisation ? (COM2.T.4) | |
| Walid Chikhi (Meteo Algerie) |
Alexandre (MF) |
Towards a more portable EPyGrAM: using standalone FA (refactored) and ectrans (COM2.1.10), make EPyGrAM available as an API | report |
| Polly Schmederer (GeoSphere Austria) | Fabrizio Baordo and Carlos Peralta (DMI) | further development of the panelification tool in harp, MQA1.3 | |
| Ivan Vujec Iris Odak (DHMZ) |
Irene Schicker (Geosphere Austria) | Analog-based post-processing methods, E6.5 | |
| Loic Maurin (MF) |
Daan Degrauwe (RMI) | FVM, DY2.1 | |
| Gabriel Stachura Piotr Sekula (PL) |
Jan Mašek (CZ) |
SU3.3 Testing options in SURFEX physics with ALARO upper air physics | |
| Chris Romick (KNMI) | A.Mary/T.Lestang (MF) | Vortex (SY4.1): enable an ACCORD system person to become knowledgeable about Vortex, in order to later study the potential of this tool for ACCORD scripting (for DA components or their workflow components). | |
| Marvin Kähnert (MetNo),Laura Mack (PhD Student, Norway/MetNo),Meto Shapkalijevski (SMHI), Juan Jesus G. A. (AEMET) | Wim de Rooy (KNMI) |
PH1.4-PH1.5: Scale-adaptive shallow convection and turbulence scheme in HARMONIE-AROME. Consequence on convection organization. | |
| Juan Jesús Gonzáles Alemán (AEMET) | Andrew Singleton (Met Norway) | Development of cloud tracking for convective activity verification based on MSG/MTG brightness temperature and radar reflectivity. Implementation in HARP through R-Python connection. MQA1 MQA2 | |
| Nour El Isslam Kerroumi (DZ) |
Rafiq Hamdi (RMI) |
SU3.3/SU5.5 The use of ECO-SG in AROME and its impact on urban simulation over Algerian cities. | report |
| Maria Monteiro (PT) | Eric Bazile (MF) | Surface DA cycling (OI) with AROME-France on various DAsKIT domains, to be used as a reference for implementation [SU1] | |
| Alina Lerner (EE) | Siebren de Haan (KNMI) | High-resolution cloud data assimilation [DA7.3] | report |
| Jana Sanchez (SP) | Stephanie Guedj (Met Norway) (Benjamin Menetrier, Åsmund Bakketun, Per Dahlgren) | Extension and harmonisation of tuning tools (ODB2 interface, Desroziers in Python, harmonise a LACE HIRLAM functionalities and needs, background errors in observation space for lam functionality tool (BGOS) etc., new satellite diagnostics tool) [DA4.6, DA8.1] | report |
| Idir Dehmous (BE) | Stephanie Guedj (Met Norway) (Benjamin Menetrier, Åsmund Bakketun, Per Dahlgren) | Extension and harmonisation of tuning tools (ODB2 interface, Desroziers in Python, harmonise a LACE HIRLAM functionalities and needs, background errors in observation space for lam functionality tool (BGOS) etc., new satellite diagnostics tool) [DA4.6, DA8.1] | |
| Magnus Lindskog (SE) | Stephanie Guedj (Met Norway) (Benjamin Menetrier, Åsmund Bakketun, Per Dahlgren) | Extension and harmonisation of tuning tools (ODB2 interface, Desroziers in Python, harmonise a LACE HIRLAM functionalities and needs, background errors in observation space for lam functionality tool (BGOS) etc., new satellite diagnostics tool) [DA4.6, DA8.1] | |
| Issam Lagha (DZ) | Idir Dehmous (RMI) | Jk matrix evaluation, Mix of large scale information from host model with initial conditions in 3Dvar AROME [DA5.7] | report |
| Mario Hrastinski (DHMZ) | Petra Smolikova (CHMI) | PH1.1 and PH1.3.1: Scale adaptation of horizontal and vertical turbulence | |
| Adhithiyan Neduncheran (AT) | Olivier Audouin (MF) | Assimilation of IR or visible radiances [DA 3.2] | report |
| Zahra Sahlaoui (MA) | Mary Borderies (MF) | Assimilation of all-sky microvawe radiances [DA 3.2] | |
| Alexandra Craciun (RO) | Petra Smolikova (CHMI) | DY1.1 dynamic definition of iterative time schemes | |
| Nika Kastelec (SLN) | Petra Smolikova (CHMI) |
DY1.3 formulation of NH dynamics as departure from hydrostatic | |
| Rolf Myhre (NO) | Yann Seity/Philippe Marguinaud (MF) | continuation of APL_AROME refactoring | |
| Ole Lindberg (DK) | Yann Seity/Philippe Marguinaud (MF) | code refactoring | |
| Denis Haumont (BE) | Philippe Marguinaud (MF) | code refactoring | |
| Ulf Andrae (SMHI) | Clemens Wastl (Geosphere Austria) | SPP code harmonization (HarmonEPS, C-LAEF) to be implemented in cy49 (E9.4, SY4) | |
| David Němec (CHMI) | Kwinten Van Weverberg (RMI) | PH3: Clouds-precipitation microphysics, PH3.2: analysis of aerosols introduction to APLMPHYS | |
| Sophia Schaeffer (MF) | Jan Masek (CHMI) | Expertise building on ACRANEB2 | |
| Patrick Samuelsson (SMHI) | Adrien Napoly (MF) | Phasing for SURFEX v9 | |
| Abhishek Lodh (SMHI) | Katya Kurzeneva (FMI) | RWP2024 task SU1.4: Work on EnKF surface data assimilation in the HARMONIE-AROME system | |
| Jelena Bojarova (SMHI) | Pau Escribà (AEMET) | phasing of HybridEnVar into CY48 in an OOPS consistent way. |
2023
| Visitor | Host | Topic | Report |
|---|---|---|---|
| Mustafa Başaran (MGM) | Clemens Wastl (GEOSPHERE Austria) | E8.5: C-LAEF for Turkey | |
| Pau Escriba (AEMET) & Roel Stappers (Met Norway) | Jan Barkmeijer (KNMI) | DA6.9 TL/AD for OOPS 4D-Var. | |
| Thomas Vergauwen (RMI) | Geoffrey Bessardon (Met Eireann) | ML in physiography - SU5.6 | |
| Piotr Sekula (IMGW-PIB) | Laura Rontu (FMI) | Aerosols and radiation with acraneb2 PH6 | |
| Ana Šljivić (DHMZ) | Laura Rontu (FMI) | Aerosols and radiation with acraneb2 PH6 | |
| Rolf Myhren (Met.No) | Sebastien Riette, Quentin Rodier | SPTR: PHYEX/APL-Arome code refactoring | |
| Bert van Ulft (KNMI) | Sebastien Riette, Quentin Rodier | SPTR: PHYEX code refactoring | |
| Nour El Isslam KERROUMI (ONM/DZ) | Rafiq Hamdi (RMI) | Evaluation of surfex-offline with TEB (SU3.3) | |
| Walid CHIKHI (Algeria), hosted by Alexandre Mary and Ryad EL Khatib (MF), funded by MF in-kind | Externalization of LFI-FA formats from the IAL Code | report |
2022
| Ana Šljivić (Croatia) | FMI / Laura | Physics PH6.3 - radiation | |
| DA scientific working visit | Norrköping. Sigurdur Thorsteinsson IMO to Magnus Lindskog and Jelena Bojarova, SMHI. | DA on ships VarBC | |
| Geoffrey Bessardon (Met Éirean), Sandro Oswald (ZAMG) | FMI (Ekaterina Kurzeneva and Olli Saranko), | Applying ML for physiographic maps (SU5.6 of RWP2022). | |
| Ahto Mets (ESTEA), Daniel Yazgi (SMHI) | Alex Deckmyn (RMI) | Development of harpSpatial | |
| Abdenour Ambar | MF (Toulouse) Yann | Interaction Dust/turbulence & Lima | |
| Suzana Panežić (DHMZ) | CHMI / Alena Trojakova | Further sensitivity studies with radar reflectivity DA | report |
| Matjaž Ličar (ARSO) | OMSZ/Helga Toth | Remote-sensed observations in SEKF | |
| Ana Šljivić | Eric (Toulouse) | Develop a simplified version of ISBA, in order to implement a Surfex-independent test case in DAVAÏ for the 3 CSCs) | |
| Alina Lerner (ESTEA) | Roger Randriamampianina (MeT Norway), | Set up a high resolution NWP system with DA | report |
| Mohamed Mokhtari | MF (Toulouse) Yann | Coupling LIMA-Aerosols-CAMS | report |
| Rolf Heilemann Myhre | RMI (Brussels) | Code adaptation tools | |
| Harold McInnes (Met Norway) | SMHI/Ulf Andrae, Patrick, Daniel Yazgi | EPS E11.2 - Extend SPP to surface parameters | report |
| Carlos Geijo (AEMET) | Magnus Lindskog (SMHI) | Meteorological Radar Doppler Wind Data Assimilation in HARMONIE-AROME using the Field-Alignment Algorithm | report |
| Michiel Van Ginderachter | CHMI | Graupel in ALARO PH3.5 | |
| Marvin Kahnert (tbc) | KNMI/Wim de Rooij | PH2: capacity building: Wim to teach Marvin the details of the Harmonie-Arome turb/shallow convection codes | |
| Rachel Honnert | ZAMG/Christoph Wittman | Shared evaluation of the 3D orographic effect on the turbulence (Goger) recently implemented in AROME with ZAMG tools developed for Alpine region | |
| Mats Dahlbom (DMI), Jana Sanchez (AEMET) | Martin Ridal (SMHI) | Radar assimilation (common quality control/monitoring/status update, Doppler winds Data Assimilation, preprocessing radar data, ...) | report |
| Kristian Pagh Nielsen | Quentin Libois & Yann Seity / Toulouse | Discuss evolution of radiation physics | report |
2021
| Metodija Shapkalijevski, SMHI (Sweden) & Samuel Viana, AEMET (Spain) | Aaron Boone, Quentin Rodier, Patrick Le Moigne, Météo-France (Toulouse) | Implementing the roughness-sublayer parameterization in SURFEX vegetation-atmosphere coupling | report |
| Ahto Mets (Estonia) | Carl Fortelius, FMI (Helsinki) | training on diagnostic monitoring and verification practices | report |
| Alina Lerner (Estonia) | Roger Randriamampianina and Per Dahlgren, Met.no (Oslo) | training on the data assimilation processes in Harmonie system | report |
| Maria Monteiro, IPMA (Portugal) | Pierre Brousseau, Maud Marter, Météo-France (Toulouse) | Radar DA | |
| Iris Odak Plenković, DHMZ (Croatia) | Alexander Kann and Irene Schicker, ZAMG (Vienna) | The analog-based method application to gridded data post-processing | report |
| Ana Slivic, DHMZ (Croatia), Piotr Sekula, IMGW (Poland) | Laura Rontu, FMI (Helsinki) |
The ACCORD budget funds Working Weeks and Scientific Visits between ACCORD teams. Other visits are directly funded by the NMSs, or the groupings (UWC, LACE).
In 2021, due to Covid pandemic, most of the WWs and visits were converted into on-line meeting or cancelled.