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Centre National de la Recherche Scientifique-Institut Pierre Simon Laplace

The Centre National de la Recherche Scientifique (CNRS) is the main French public research institution under the responsibility of the French Ministry of Education and Research. CNRS acts here in the name of the Institut Pierre Simon Laplace (IPSL), which is a federal institute located in Paris and composed of 9 research laboratories working on global environmental and climate studies. IPSL gathers about thousand scientists and represents more than a third of the French research potential in atmospheric and oceanic sciences. Main laboratories from IPSL involved in ESiWACE are Laboratoire des Sciences du Climat et de l'Environnement, and Laboratoire d’Océanographie et du Climat. One of the main objectives of IPSL is to understand climate variability, both natural and anthropogenic, and future evolution, at global and regional scales.

IPSL's work relies on the development of Earth system models of different complexity (e.g. IPSL-ESM). IPSL is strongly involved in IPCC Working Group 1. CNRS-IPSL coordinates IS-ENES and IS-ENES2, and has also been involved in several European projects such as ENSEMBLES, METAFOR, EMBRACE, CRESCENDO. CNRS-IPSL was a pioneer in developing since the 1980s a numerical model of the global physical ocean taking into account the HPC issues from the very beginning. This led to the NEMO Consortium involving different research/operational oceanography centres in Europe (CNRS through LOCEAN and LGGE, CMCC, INGV, Mercator Ocean, UK Met Office, NOC), which join efforts for the sustainable development of NEMO ( Today, CNRS is, among the consortium partners, the largest contributor in terms of number of experts to the NEMO System Team, including the Scientific Leader and the Project Manager, and leading the NEMO HPC working group. CNRS-IPSL with the Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA) have developed XIOS, a software library dedicated to efficient IO management for climate models.

Role in the project

CNRS-IPSL will lead ESiWACE's WP1 and substantially contribute to WP2 on NEMO and XIOS.

Names of the colleagues involved

Dr. Sylvie Joussaume, Marie-Alice Foujols, Sébastien Denvil, Claire Lévy, Françoise Pinsard, Dr. Sébastien Masson, Dr. Yann Meurdesoif, Arnaud Caubel

Relevant infrastructure and services available for climate & weather

 HPC: The High Performance Computing resources are provided by the French national supercomputing facility GENCI.

Modelling frameworks and tools: The IPSL-Earth System Model, available in different configurations at different resolutions, is in permanent evolution to reflect state-of-the-art numerical climate science. The model used for CMIP5, IPSL-CM5, includes 5 component models: LMDz (atmosphere), NEMO (ocean, oceanic biogeochemistry and sea-ice), ORCHIDEE (continental surfaces and vegetation), and INCA (atmospheric chemistry), coupled through OASIS. Such a system also includes an I/O library (IOIPSL), an assembling and compiling environment (modipsl), an execution environment (libIGCM) and a set of post-processing tools. 80 IPSL-ESM users are registered in IPSL and associates laboratories, whereas about 200 people use one or more components separately. IPSL-CM5 is used in about 50 European projects and more than 550 projects access its IPCC result database.

Support services (currently provided by the project IS-ENES2) for IPSL-ESM consist in the provision of a contact person and in the maintenance of the model description, using the CIM metadata format, on the ENES portal
NEMO (Nucleus for European Modelling of the Ocean) is a state-of-the-art modeling framework for oceanographic research, operational oceanography seasonal forecast and climate studies.
NEMO version 3.4.1 (Jan 2012) includes 5 major components: the blue ocean (ocean dynamics, NEMO-OPA), the white ocean (sea-ice, NEMO-LIM), the green ocean (biogeochemistry, NEMO-TOP), the adaptative mesh refinement software (AGRIF), the assimilation component NEMO_TAM and NEMO_OBS, some reference configurations allowing to set-up and validate the applications, a set of scripts and tools (including pre- and post-processing) to use the system. NEMO allows some of these components to work together or in standalone mode. It is interfaced with the other components of the Earth system (atmosphere, land surfaces, ...) via the OASIS coupler. NEMO is intended to be a portable platform, currently running on a number of computers.

Support services (currently provided by the project IS-ENES2) for NEMO: NEMO is available as a source code, after registration (on the NEMO web site) and free licence agreement. 6 reference configurations are available, with their downloadable input files.

XIOS (XML – IO – SERVER) is a library dedicated to flexible and efficient I/O management of climate model. XIOS manages output diagnostic, history files, performs temporal and spatial post-processing operation (averaging, max/min, instant, etc…).

Data infrastructure: Part of ENES, IPSL contributes to the European joint effort in the set up and maintenance of the Earth System Grid Federation (ESGF).

Support services (currently provided by the project IS-ENES2) for users and data managers on the model data hosted by ESGF include: provision of information on how to search and access data from the internationally-coordinated WCRP model intercomparison experiments (CMIP5, CORDEX), and on how to synchronize local data repositories with data hosted on the ESGF.


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