The PRISM infrastructure for Earth system models Eric Guilyardi, CGAM/IPSL and the PRISM Team...

The PRISM infrastructure

The PRISM infrastructureThe PRISM infrastructurefor Earth system modelsfor Earth system models

Eric Guilyardi, CGAM/IPSLand the PRISM Team

• Background and drivers• PRISM project achievements• The future


Why aWhy a common software infrastructure ?common software infrastructure ?

• Earth system modelling expertise widely distributed

Geographically

Thematically


Why aWhy a common software infrastructure ?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


« 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

PRISM conceptPRISM concept


Expected benefitsExpected 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


Software structure of an Earth System ModelSoftware structure of an Earth System Model

Running environment

Coupling infrastructure

Scientific core

Supporting software

Share(i.e. f90)


Hardware

Fortran Compiler

Earth System model(Science + support +

environment)

The long term viewThe long term view

Today

Modeller

IT expert

Standard support Library (incl. Env.)

Hardware

Fortran Compiler

Earth System model(Science)

Tomorrow

Climate science work

Towards standard ESM support library(ies)


The PRISM projectThe PRISM project

• Program for integrated Earth System Modelling– 22 partners– 3 Years, from Dec 2001 - Nov 2004– 5 Mill. € funding, FP5 of the EC (~80 py)– Coordinators: G.Brasseur and G.Komen


PRISM PRISM infrastructureinfrastructure

- General principles - Constraints from physical interfaces,…

- Coupler and I/O - Compile/run environment - GUI - Visualisation and diagnostics

- requirements - beta testing - feedback

The community models

The science :

The technical developments:

The modelers/users:

- Atmosphere - Atmos. Chemistry - Ocean - Ocean biogeochemistry - Sea-ice - Land surface - …

Let’s NOT re-invent the wheel !

System specificationsSystem specifications


System specifications - the peopleSystem 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

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* Chair


1. a standard coupler and I/O software, OASIS3 (CERFACS) and OASIS42. a standard compiling environment (SCE) at the scripting level3. a standard running environment (SRE) at the scripting level4. a Graphical User Interface (GUI) to the SCE (PrepIFS, ECMWF)5. a GUI to the SRE for monitoring the coupled model run (SMS, ECMWF)6. standard diagnostic and visualisation tools

PRISM achievements (so far):

• 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

• Software environment (the tool box):


The PRISM shellsThe PRISM shells

Standard Running EnvironmentStandard Running Environment

Standard Compile Environ.Standard Compile Environ.

PSMILe (coupling and I/O)PSMILe (coupling and I/O)

Historic I/O Historic I/O

Outer shellsOuter shells

Inner shellInner shell

Scientific coreScientific core


Adapting Earth System Components to PRISMAdapting Earth System Components to PRISM

SRESRESCESCE

UserUserInterfaceInterface

Levels of Levels of adaptation adaptation

++ PSMILe + PMIODPSMILe + PMIOD

PRISM Model Interface LibraryPRISM Model Interface LibraryPotential Model IO DescriptionPotential Model IO Description


Configuration management and deploymentConfiguration management and deployment

Binary executablesBinary executables

SCESCE

UserUserInterfaceInterface

SRESRE

Transf.

DriverDriver

disks


InternetInternet

PRISM GUI remote functionalityPRISM GUI remote functionality

User

PRISMPRISMRepositoriesRepositories(CSCS, MPI)(CSCS, MPI)

Config.Config.

Inst

rum

ente

d

Inst

rum

ente

d

site

ssi

tes

Transf.

DriverDriver

Architecture A

Transf.

DriverDriver

Architect. B

Transf.

DriverDriver

Architect. C

DeployDeploy

PrepIFS/SMSWeb services


Standard scripting environmentsStandard scripting environments

• Standard Compiling Environment SCE

• Standard Runtime Environment SRE


Data processing and visualisationData processing and visualisation


Demonstration experimentsDemonstration experiments

PlatformsPlatforms

AssembledAssembledCoupled modelsCoupled models

CGAM contribution(Jeff Cole)


Development coordinatorsDevelopment 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)


Community buy-inCommunity buy-in• Growing !

– Workshops and seminars– 15 pionneer models adapted (institutes involvement)– 9 test super-computers intrumented – Models distributed under PRISM env. (ECHAM5, 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


CollaborationsCollaborations

Active collaborations:• ESMF (supporting software, PMIOD, MOM4)• 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)

Coupling infrastructure

Scientific core

Supporting software

Running environment

PRISM has put Europe in the loop for community-wide convergence on basic standards in ES modelling

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


The futureThe 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 for Earth system models Eric Guilyardi, CGAM/IPSL and the PRISM Team...

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