Parallel session D: CORDEX in Practice

All D-sessions in Trieste are held between 14.30-17.00 CEST

D1. CORDEX-Ocean: Towards a CORDEX framework for Ocean Regional Climate Modelling (online and Trieste)

Conveners: Samuel Somot (Med-CORDEX), Marine Herrman (CORDEX South-East Asia), Markus Meier (EURO-CORDEX, Baltic Earth) and Tereza Cavazos (Central America CORDEX).

Since its inception, the CORDEX initiative has focused mainly on continental areas, leaving oceanic areas aside. However, today, the regional climate scientific community is facing more and more questions from citizens and policy makers regarding the necessary adaptation of marine ecosystems and maritime or coastal activities to ongoing and future climate change. This D-session proposes to assess the challenges in regional ocean modeling at climate scale, to identify the obstacles to overcome in order to reach a large-scale international coordination, and to reflect on the opportunity to develop a CORDEX framework for Ocean Regional Climate Modelling.

Oral abstract submission.

Contact: Samuel Somot (, Tereza Cavazos (, Marine Herrmann (, Markus Meier, (

D2. Regional Climate Modelling in the Polar Regions: Applications and the road ahead (online and Trieste)

Conveners: Priscilla A. Mooney, Annette Rinke and John Cassano.

The main aim of this session is to assess the latest advances in the development and applications of regional climate models and climate projections for the Polar Regions. Results of this session could inform future research efforts in this area. Participants are invited to submit abstracts to this session that focus on the development of polar climate models and application of high-resolution climate modelling over the Polar Regions. This session also welcomes contributions from global modeling, statistical downscaling methods and impact assessments.

Abstract submission.

Contact: Priscilla Mooney (, Annette Rinke (, John Cassano (

D3. Discussion session: Climate projections for islands (online and Trieste)

Conveners: Jason Evans (CCRC), Tannecia Stephenson (UWI),  Marcus Thatcher (CSIRO), Christophe Menkes (ENTROPIE, IRD, CNRS), Matthieu Lengaigne (MARBEC, Univ. Montpellier, CNRS, Ifremer, IRD, Sète, France), Ali Belmadani (ENM & CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France).

The aim of this session is to gather members of the CORDEX and broader regional climate modelling community interested in simulating the climate of islands. The session will present past and ongoing efforts to downscale climate projections over islands, discuss the major challenges facing the production of such projections, and propose a way forward that may include a Flagship Pilot Study focused on downscaling over islands. Participants are invited to submit abstracts to this session.

Abstract submission.

Contact: Jason Evans (, Tannecia Stephenson (, Marcus Thatcher (, Christophe Menkes (, Matthieu Lengaigne (, Ali reda Ben Madani (

D4. Climate services for transformation using CORDEX datasets: best practices using FAIR principles and innovative tools (online and Trieste)

Conveners: Claas Teichmann (GERICS), Lars Buntemeyer (GERICS), Helena Martins (SMHI), Angel Muñoz (BSC), Armelle Remedio (GERICS), Christine Nam (GERICS), Francisco Doblas-Reyes (BSC), Gaby S. Langendijk (GERICS), Katharina Bülow (GERICS), Ludwig Lierhammer (GERICS), Marjana Brkić (CPN), Marta Terrado (BSC), Peter Hoffmann (GERICS), Ross D. Dixon (UNL).

In this session, we want to present and discuss methods and best practices in current climate services as well as an outlook of how future developments can be designed under FAIR conditions. User experiences show an increasing demand for guidance on how to use CORDEX data in climate services which calls for discussions on community work inside and outside of CORDEX and how this can be improved. Furthermore, upcoming simulations for use in climate services should involve users from different backgrounds in a co-production design process to tackle their requirements and provide useful climate services products.

At the end of the session, we will have a demo part involving hands-on code examples to explore some current developments and tools for working with regional climate model data and its application in climate services.

Abstract submission.

Contact: Claas Teichmann (, Helena Martins (

D5. Coordinated Training Programs (online and Trieste)

Conveners: Chris Lennard, Fredolin Tangang and Maria Laura Bettolli.

Training and capacity building programs in regional climate downscaling and data analysis are vital to develop the next generation of climate researchers, especially in developing countries. Implementing them in a coordinated manner under the CORDEX and WCRP Academy umbrella would add to the effectiveness and impact of these programmes.

In relation to this there are a number of relevant questions that require addressing such as: What are the practicalities of running trainings in different parts of the world? Is there an ‘optimal/preferred’ number of participants and number of days for different kinds of workshops? What is the approximate cost in different regions? What works well for different formats – on site, online, hybrid? What have we learned from Covid? What tools are needed/recommended for dynamical/statistical downscaling and for viewing/analyzing data? Do the participants need some prescribed background and what competence/experience is needed from lecturers? Is it best to mix experts and users to bridge the gap between science and society? What training and capacity development themes need (still) to be addressed?

There have during the years been a number of such training workshops conducted in Asia, Africa and Central/South America. This D-session primarily provides a platform for exchanges of experiences and discussion about best practices to run capacity development activities within CORDEX. The outcomes could lead to a drafting of some guidelines/standards for anyone to use as a baseline when organizing a ‘CORDEX training/workshop’, and contribute to collaborations with the WCRP Academy.

No abstract submission.

Contact: Chris Lennard (, Fredolin Tangang (, Maria Laura Bettolli (

D6. High resolution urban climate modeling and regional climate change – progress and challenges for CORDEX (online and Trieste)

Conveners: Dr. Tomas Halenka, Dr. Gaby S. Langendij, Dr. Sri Raghavan and Mr. Muhammad Ammar.

This session focuses on urban areas and its interactions with the regional climate, as well as on the challenges and opportunities to include an improved urban representation in regional climate models for future CORDEX simulations. It will highlight new developments and results within urban modelling initiatives, including the FPS URB-RCC. The session also invites papers and discussions on what has been achieved in terms of high/extra fine (sub-km) scale urban climate modelling, especially under climate change.

Abstract submission.

Contact: Srivatsan Vijayaraghavan (, Gaby Langendijk (, Tomas Halenka (, Muhammad Ammar (

D7. Training on how to compare bias-corrected Regional Climate Models (RCMs) with Empirical Statistical Downscaling (ESD) for robust future climate change projections, exploring tools/products (online and Trieste)

Conveners: Huikyo Lee (Jet Propulsion Laboratory, California Institute of Technology, USA), Rasmus Benestad (Norwegian Meteorological Institute (NMI), Norway), Abdelkader Mezghani (NMI), Kajsa Parding (NMI), Ian Brosnan (NASA Ames Research Center, USA), Alexander
Goodman (Jet Propulsion Laboratory, California Institute of Technology, USA).

This session will aim at training the users on how to perform a comprehensive analysis comparing both bias-corrected regional climate model output and empirical-statistical downscaling results against observations to obtain a robust and reliable climate change prediction. It will follow up work carried out during the #ConCordOslo20221 workshop and previous CORDEX D sessions.

We will explore CORDEX RCM output and statistically downscaled products, such as NASA Earth
Exchange Global Daily (NEX-GDDP-CMIP6) and region-specific ESD-seasonal Downscaled Projections. We will be using tools such as the R-esd package developed by the Norwegian Meteorological institute and the Regional Climate Model Evaluation System (RCMES) developed by NASA. This includes hands-on training about extracting, processing, downscaling, bias-correcting, visualizing, analyzing and manipulating datasets. The training will also address two approaches in ESD: “downscaling weather” and “downscaling climate” and we will explain new concepts such as “common EOFs” as a framework for ESD predictors.

The expected outcome of this training workshop is 1) to disseminate statistically downscaled multi-model CMIP6 GCM ensembles and open-source software to analyze the downscaled dataset to the CORDEX community, 2) to train potential users of NEX-GDDP-CMIP6 to make use of cloud-based resources, and 3) to increase communication and collaboration between different CORDEX domains.

No abstract submission.

Contact: Huikyo Lee (, Rasmus Benestad (, Abdelkader Mezghani ( Kajsa Parding (, Ian Brosnan (, Alexander Goodman (

D8. Extreme Events: Observations and Modeling (online and Pune)

Conveners: Sridhara Nayak, Koji Dairaku, Suman Maity, J Sanjay, Mandira Singh Shrestha, Lalu Das.

This session is aimed to address the scientific questions on how we can integrate multiple data (global and regional, dynamical and statistical models, hazard and risk impacts) and physical understanding to fit for diverse societal needs? In particular, the observational and numerical modeling studies on extreme events over any CORDEX regions are aimed to discuss in this session to advance the understanding of the physics and dynamics associated with the extreme events.

Oral and poster abstract submission.

Contact: Sridhara Nayak (, Koji Dairaku (, Suman Maity (, J Sanjay (, Mandira Singh Shrestha (, Lalu Das

D9. Aerosol impact on regional climate (online and Trieste)

Conveners: Marc Mallet (Meteo-France), Fabien Solmon (LAERO/OMP), Erik Kjellström (SMHI), Klaus Wyser (SMHI), Grigory Nikulin (SMHI), Helena Martins (SMHI), Johannes Quaas (Uni Leipzig), Michael Schulz (Met Norway), Annica Ekman (SU), Ilona Riipinen (SU).

This session, co-organised by FORCeS and the Med-CORDEX FPS on Aerosol, aims to bring together the latest advances in studies of regional aerosol impact from both global and regional climate modelling communities. Participants are invited to submit abstracts to this session with focus on linkages between aerosols and regional
climate change, both for past and future conditions. Abstracts on how global and regional climate models can be improved for better representation of key aerosol processes, as well as, on-going or soon to come coordinated actions, are also welcome. There is also an option to display posters in the session.

Abstract submission.

Contact: Erik Kjellström (

D10. Concepts and identification of global warming levels (GWLs) for regional climate services (online)

Conveners: members of three weather services, Deutscher Wetterdienst (D), GeoSphere Austria (A), and MeteoSwiss (CH).

This session is devoted to the use of GWL-methods in the context of CORDEX. Short presentations will cover GWL approaches with focus on regional simulations and climate services. Experiences with communicating the regional interpretation of GWLs are welcome. Ideally, the discussion will result in a recommended approach to compute and use GWLs in the CORDEX community. Online session with no limit to number of participants, abstract submission encouraged.

Abstract submission.