Coupling Workshops

First Workshop on Coupling Technologies for Earth System Models (CW2010)

CERFACS and the Georgia Institute of Technology organized a workshop on the theme of “Coupling Technologies for Earth System Modelling : Today and Tomorrow”. The first thrust of the workshop was to assess the state of the art in ESM coupling frameworks. The second thrust was to discuss a vision for coupling in the year 2020.

Discussions from this workshop resulted in a review paper on the state of the art, entitled Coupling Technologies for Earth System Modelling (in Geosci. Model Dev., 5, 1589-1596, 2012).

Second Workshop on Coupling Technologies for Earth System Models (CW2013)

• BAMS report on the Second Workshop.

Third Workshop on Coupling Technologies for Earth System Models (CW2015)

The Third Workshop on Coupling Technologies for Earth System Models (CW2015) was held on the 20th-22nd of April, 2015 at the Manchester Art Gallery in Manchester, U.K.

• Program
• List of participants
• Paper in BAMS: Sharing Experiences and Outlook on Coupling Technologies for Earth System Models

The workshop aims to bring together leading researchers and practitioners in the field of coupling infrastructure for Earth System models. This workshop is the third in a series, the first being held at CERFACS in December 2010 and the second at NCAR in February 2013. Topics relevant to the workshop include, but are not limited to:

• Recent developments and experience reports on the development and use of coupling infrastructure for Earth System and other geoscience community models
• Performance characteristics of coupling infrastructure, including benchmarking
• Experiences from, and interaction with, the wider geoscience coupling community (such as hydrological modelling)
• Framework interoperability (for example, the use of multiple coupling technologies in a single coupled application)
• The role and use of metadata in coupling technologies
• Community aspects of coupling technology development: how to fund, govern and work together?

Fourth Workshop on Coupling Technologies for Earth System Models (CW2017)

The Fourth Workshop on Coupling Technologies for Earth System Models (CW2017) was held on the 20th-22nd of March, 2017 at the Princeton Center for Theoretical Science on the campus of Princeton University, USA.

The workshop aims to bring together leading researchers and practitioners in the field of coupling infrastructure for Earth System models. This workshop is the fourth in a series, the first being held at CERFACS in December 2010, the second at NCAR in February 2013, and the third in Manchester in April 2015.

Topics relevant to the workshop include, but are not limited to:

• Development and use of coupling technologies for Earth System Models
• Performance considerations of couplers
• New developments in existing coupling infrastructure
• Couplers, metadata and workflows
• Coupling frameworks in the broader geosciences
• Science of coupling (interpolation methods, convergence, stability)

This workshop was sponsored by IS-ENES2 and the Princeton University Cooperative Institute for Climate Science.

Slides from the workshop talks

Program

• Monday, March 20, 2017 Coupling Technologies (Chairs: V. Balaji, Mariana V.)

• Tuesday, March 21, 2017 Use of Coupling Technologies in ESMs (Chair: Bert J.)

• Performance of Couplers and Coupled Systems (chair: Rocky Dunlap)

• Wednesday, March 22, 2017 Science of Coupling and Coupling Strategies (Chair: Sophie V.)

:—-: | :——–: | :———-:

Fifth Workshop on Coupling Technologies for Earth System Models (CW2020)

The 5th Workshop on Coupling Technologies for Earth System Models (CW2020) was held virtually on September 21st-24th 2020, with one session of 3.5 hours each day, starting at 15h00 (Paris time).

• Program
• Abstracts
• Watch the recording of the CW2020 on the IS-ENES3 Youtube channel !

The workshop aims to bring together leading researchers and practitioners in the field of coupling infrastructure for Earth System Models. This workshop is the fifth in the series, started in 2010 in Toulouse and followed by Boulder USA (2013), Manchester UK (2015), and Princeton USA (2017).

Presentations

Session 1: Coupling technology latest developments I

• Latest developments of the OASIS3-MCT coupler for improved performance, Sophie Valcke
• Update on the Earth System Modeling Framework, Rocky Dunlap
• C-Coupler2: a flexible and user-friendly community coupler for model coupling and nesting, Li Liu
• Update on YAC and an introduction to ICON-ESM, Moritz Hanke

Session 2: Coupling technology latest developments II

• Couplers for E3SM: Comparisons between a fully online vs an offline-online remapping workflow, Vijay Mahadevan
• Earth System Modeling Framework Regridding Update, Robert Oehmke
• esm-interface, Nadine Wieters
• The Oceanographic Multipurpose Software Environment: introduction and applications, Inti Pelupessy
• Fast GCM - ice sheet model coupling software OBLIMAP 2.0, including on-line embeddable mapping routines, Thomas Reerink

Session 3: Coupling models in practice I

• EC-Earth 4: Flexible coupling ESM components for practical use, Uwe Fladrich
• The two-way online-coupled model ICONGETM: Regridding strategy and capabilities provided by the X-Grid structure from ESMF, Tobias Bauer
• CMEPS: Community Mediator for Earth Prediction Systems, Mariana Vertenstein

Session 4 - Computational performances of coupled models

• Process and Thread Affinity with MPI/OpenMP, Yun He
• HW topology management in Message-Passing based parallel applications, Guillaume Mercier
• Adaptive Parallelism for Coupled, Hybrid Programs, Samuel K. Gutierrez
• Task Parallel Runtimes and Algorithmic Improvements for Coupled Earth System Models, Phil Jones
• Computational coupling cost evaluation: Challenges and solutions for the new generation of Earth System Models, Mario Acosta

Session 5: Data Assimilation and NWP

• Ocean-Wave-Atmosphere coupling with SURFEX and OASIS for mesoscale simulations and numerical weather prediction of tropical cyclones, Sylvie Malardel
• The development of coupled NWP forecasting at the Met Office and ocean forecast systems, Dan Copsey
• Efficient Ensemble Data Assimilation for Earth System Models with the Parallel Data Assimilation Framework, Lars Nerger
• Coupling requirements for various flavours of coupled variational data assimilation at ECMWF, Phil Browne
• Coupled atmosphere-ocean data assimilation system in the Canadian global prediction system, Sergey Skachko

Session 6: Coupling models in practice II

• Modular System for Shelves and Coasts (MOSSCO) - Science applications, unstructured representations, and particle dynamics, Carsten Lemmen
• Improving the river outflow coupling in a global climate model, Aurore Voldoire
• New Capabilities in MAPL, Tom Clune
• The Unified Forecast System (UFS); using community modeling to improve operations at NOAA, Hendrik Tolman
• Coupling in the Navy Earth System Prediction Capability (Navy-ESPC) global coupled model, Neil Barton

Session 7: Coupling models in practice III

• Coupling a moving-mesh to a fixed grid, Einar Olason
• Moving the boundaries: coupling interactive ice sheets in UKESM, Robin Smith
• An assessment of potential climate impact during 1948- 2010 using historical land use land cover change maps, Nagaraju Chilukoti
• Coupling Hydrological models through eWaterCycle, Niels Drost
• A New Atmosphere-Land Coupling in TerrSysMP: ICON and CLM3.5, Slavko Brdar

Session 8: Coupled model workflows

• ESM-Tools - A tool for Earth System Modelling, Deniz Ural
• CMIP6 at IPSL: a 4-year journey, Arnaud Caubel
• Coupled model control systems: Problems = Opportunities, Richard Hill

The CW2020 Organising Committee is composed of:

• V. Balaji, Princeton Cooperative Institute for Modeling the Earth System (CIMES) & Laboratoire de Sciences de Climat et Environnement (LSCE)
• Tony Craig, Software Consultant
• Rocky Dunlap, National Center for Atmospheric Research
• Steve Easterbrook, University of Toronto
• Robert Jacob, Argonne National Laboratory
• Bert Jagers, Deltares
• Li Liu, Tsinghua University
• Kristian Mogensen, ECMWF
• Jean-Christophe Rioual, UK Met Office
• Sophie Valcke, Cerfacs
• Mariana Vertenstein, National Center for Atmospheric Research

This workshop is funded by the EU H2020 IS-ENES3 project

Contact: Sophie.Valcke[@]cerfacs.fr .

Sixth Workshop on Coupling Technologies for Earth System Models (CW2023)

OFFICIAL WORKSHOP WEBPAGE (Registration and detailed information).

The 6th Workshop on Coupling Technologies for Earth System Models (CW2023) will be held on January 18-20, 2023 at the “Centre International de Conférences” on Météo-France campus in Toulouse, France. The workshop will be held in a hybrid format with remote attendance possible.

The workshop aims to bring together leading researchers and practitioners in the field of coupling infrastructure for Earth System Models. This workshop is the sixth in the series, started in 2010 in Toulouse and followed by Boulder USA (2013), Manchester UK (2015), Princeton USA (2017) and virtual (2020).

Topics relevant to the workshop include, but are not limited to:

• Coupling technology latest developments
• Use of Coupling Technologies in ESMs or other climate and weather-related coupled systems: successes and failures, original or ground-breaking applications
• Computational performance of Couplers and Coupled Systems
• Coupling at exascale on heterogeneous systems.
• Science of Coupling and Coupling Strategies
• Integration of coupling technologies into workflows
• Interaction of data assimilation and coupling technologies
• Software development processes for complex coupled systems: Approaches for testing of complex coupled models, how code chages are made, build system, configuration system.

The CW2023 Program Committee (cw_org@cerfacs.fr)

• Anthony Craig, Software Consultant
• Rocky Dunlap, National Center for Atmospheric Research
• Steve Easterbrook, University of Toronto
• Robert Jacob, Argonne National Laboratory
• Bert Jagers, Deltares
• Li Liu, Tsinghua University
• Kristian Mogensen, ECMWF
• Jean-Christophe Rioual, UK Met Office
• Sophie Valcke, Cerfacs
• Mariana Vertenstein, National Center for Atmospheric Research
• Niki Zadeh, Geophysical Fluid Dynamics Laboratory

This workshop is funded by the EU H2020 IS-ENES3 project and co-organised with the Argonne National Laboratory.

International Working Committee on Coupling Technologies

The International Working Committee on Coupling Technologies (IWCCT) organizes global efforts related to the characterization, comparison, and benchmarking of Earth system model coupling technologies.

IWCCT leads international workshops that promote dialogue among groups engaged in developing model coupling technologies and infrastructure. These workshops are being held about every other year (see list of workshops above).

Discussions from the 2010 workshop resulted in a review paper on the state of the art, entitled Coupling Technologies for Earth System Modelling (in Geosci. Model Dev., 5, 1589-1596, 2012).

See the IWCCT github repository.