The PRISM infrastructure for Earth system models Eric

The PRISM infrastructure for Earth system models Eric Guilyardi, CGAM/IPSL and the PRISM Team • Background and drivers • PRISM project achievements • The future The PRISM infrastructure

Why a common software infrastructure ? • Earth system modelling expertise widely distributed Geographically Thematically The PRISM infrastructure

Why a common software infrastructure ? • Earth system modelling expertise widely distributed – Scientific motivation = facilitate sharing of scientific expertise and of models – Technical motivation = the technical challenges are large compared with available effort • Need to keep scientific diversity while increasing efficiency – scientific and technical • Need for concerted effort in view of initiatives elsewhere: – The Frontier Project, Japan – The Earth System Modelling Framework, US The PRISM infrastructure

PRISM concept « Share Earth System Modelling software infrastructure across community » To: • • share development, maintenance and support aid performance on a variety of platforms standardize model software environment ease use of different climate model components The PRISM infrastructure

Expected benefits • high performance ESM software, developed by dedicated IT experts, available to institutes/teams at low cost: helps scientists to focus on science helps key scientific diversity (survival of smallers groups) • Easier to assemble ESMs based on community models • shared infrastructure = increased scientific exchanges • computer manufacturers inclined to contribute: efficiency (porting, optimisation) on variety of platforms next generation platforms optimized for ESM needs easier procurements and benchmarking reduced computing costs The PRISM infrastructure

Software structure of an Earth System Model Running environment Coupling infrastructure Scientific core Supporting software The PRISM infrastructure Share (i. e. f 90)

The long term view Towards standard ESM support library(ies) Tomorrow Today Earth System model (Science + support + environment) Fortran Compiler Hardware The PRISM infrastructure Climate science work Modeller Earth System model (Science) Standard support Library (incl. Env. ) IT expert Fortran Compiler Hardware

The PRISM project • Program for integrated Earth System Modelling – 22 partners – 3 Years, from Dec 2001 Nov 2004 – 5 Mill. € funding, FP 5 of the EC (~80 py) – Coordinators: G. Brasseur and G. Komen The PRISM infrastructure

System specifications The modelers/users: The science : - General principles - Constraints from physical interfaces, … - requirements - beta testing - feedback PRISM infrastructure The technical developments: - Coupler and I/O - Compile/run environment - GUI - Visualisation and diagnostics The community models - Atmosphere - Atmos. Chemistry - Ocean biogeochemistry - Sea-ice - Land surface - … Let’s NOT re-invent the wheel ! The PRISM infrastructure

System specifications - the people Reinhard Budich MPI, Hamburg Andrea Carril INGV, Bologna Mick Carter Hadley Center, Exeter Patrice Constanza MPI/M&D, Hamburg Jérome Cuny UCL, Louvain la Neuve Damien Declat CERFACS, Toulouse Ralf Döscher SMHI, Stockholm Thierry Fichefet UCL, Louvain la Neuve Marie-Alice Foujols IPSL, Paris Veronika Gayler MPI/M&D, Hamburg The PRISM infrastructure * Chair Eric Guilyardi* CGAM, Reading and LSCE Rosalyn Hatcher Hadley Center, Exeter Miles Kastowsky MPI/BCG, Iena Luis Kornblueh MPI, Hamburg Claes Larsson ECMWF, Reading Stefanie Legutke MPI/M&D, Hamburg Corinne Le Quéré MPI/BCG, Iena Angelo Mangili CSCS, Zurich Anne de Montety UCL, Louvain la Neuve Serge Planton Météo France, Toulouse Jan Polcher LMD/IPSL, Paris René Redler, NEC CCRLE, Sankt Augustin Martin Stendel DMI, Copenhagen Sophie Valcke CERFACS, Toulouse Peter van Velthoven KNMI, De Bilt Reiner Vogelsang SGI, Grasbrunn Nils Wedi ECMWF, Reading

PRISM achievements (so far): • Software environment (the tool box): 1. a standard coupler and I/O software, OASIS 3 (CERFACS) and OASIS 4 2. a standard compiling environment (SCE) at the scripting level 3. a standard running environment (SRE) at the scripting level 4. a Graphical User Interface (GUI) to the SCE (Prep. IFS, ECMWF) 5. a GUI to the SRE for monitoring the coupled model run (SMS, ECMWF) 6. standard diagnostic and visualisation tools • Adaptation of community Earth System component models (GCMs) and demonstration coupled configurations • A well co ordinated network of expertise • Community buy-in and trust building The PRISM infrastructure

The PRISM shells Outer shells Standard Running Environment Standard Compile Environ. PSMILe (coupling and I/O) Scientific core Historic I/O Inner shell The PRISM infrastructure

Adapting Earth System Components to PRISM + SCE PRISM Model Interface Library Levels of SRE Potential Model IO Description adaptation User Interface The PRISM infrastructure PSMILe + PMIOD

Configuration management and deployment SRE SCE Driver User Interface Transf. Binary executables The PRISM infrastructure disks

PRISM GUI remote functionality Config. Deploy PRISM Repositories (CSCS, MPI) Internet Driver Transf. Architecture A Instrumented sites User Architect. B Architect. C The PRISM infrastructure Prep. IFS/SMS Web services

Standard scripting environments • Standard Compiling Environment SCE • Standard Runtime Environment SRE The PRISM infrastructure

Data processing and visualisation The PRISM infrastructure

Demonstration experiments Platforms Assembled Coupled models CGAM contribution (Jeff Cole) The PRISM infrastructure

Development coordinators • The coupler and I/O Sophie Valcke (CERFACS) • The standard environments Stephanie Legutke (MPI) • The user interface and web services Claes Larsson (ECMWF) • Analysis and visualisation Mick Carter (Hadley Centre) • The assembled models Stephanie Legutke (MPI) • The demonstration experiments Andrea Carril (INGV) The PRISM infrastructure

Community buy-in • Growing ! – – – Workshops and seminars 15 pionneer models adapted (institutes involvement) 9 test super computers intrumented Models distributed under PRISM env. (ECHAM 5, OPA 9. 0) Community programmes relying on PRISM framework (ENSEMBLES, COSMOS, MERSEA, GMES, NERC, …) • To go further: – PRISM perspective: maintain and develop tool box – Institute perspective: get timing and involvement in next steps right The PRISM infrastructure

Collaborations Active collaborations: • ESMF (supporting software, PMIOD, MOM 4) • FLUME (PRISM software) • PCMDI (visualisation, PMIOD) • CF group (CF names) • NERC (BADC & CGAM) (meta data, PMIOD) • M&D, MPI (data) • Earth Simulator (install PRISM system V. 0) Running environment Coupling infrastructure Scientific core Supporting software PRISM has put Europe in the loop for community-wide convergence on basic standards in ES modelling The PRISM infrastructure

PRISM Final Project Meeting The PRISM infrastructure De Bilt, October 7 -8, 2004

The future • PRISM has delivered a tool box, a network of expertise and demonstrations • Community buy in growing • Key need for sustainability of – tool box maintenance/development (new features) – network of expertise PRISM sustained initiative Set up meeting held in Paris Oct 27 2004 The PRISM infrastructure