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Cecelia DeLuca cdeluca@ucar MAP Meeting College Park, MD March 7-9, 2007

Building Community and Capability through Common Infrastructure: ESMF and the Earth System Curator. Climate. Data Assimilaton. Weather. Cecelia DeLuca cdeluca@ucar.edu MAP Meeting College Park, MD March 7-9, 2007. Modeling Evolution.

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Cecelia DeLuca cdeluca@ucar MAP Meeting College Park, MD March 7-9, 2007

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  1. Building Community and Capability throughCommon Infrastructure: ESMF and the Earth System Curator Climate Data Assimilaton Weather Cecelia DeLuca cdeluca@ucar.edu MAP Meeting College Park, MD March 7-9, 2007

  2. Modeling Evolution • Monolithic codes to modular, coupled, component-based codes • Institutional development to collaborative, distributed development • Disjoint workflows to linked workflows (model assembly, run, archival, …) • Modelswith few configuration optionsto modeling environments with many We envision a community where each modeling group locally develops its own software – but where interface standards, common tools and component and data catalogs are in place that enable the community to readily build, survey, obtain, combine and use a wide variety of modeling components and models.

  3. Components and ESMF • ESMF provides component wrapperswith standard interfaces and standard drivers. • ESMF provides data structures and common utilities, such as data communication, time management, configuration, and message logging About the ESMF project … • Now in its fifth year • Funded through multi-agency support, mainly NASA, NSF, DoD • Component interfaces are currently used by NCEP, GEOS-5, MOM4, HYCOM, ADCIRC, other Department of Defense codes, CICE, WRF, others For more information - http://www.esmf.ucar.edu

  4. ESMF Application Example GEOS-5 AGCM Application Example • Each box is an ESMF component • Every component has a standard interface to encourage “swappability”:subroutine Comp_Run(comp, importState, exportState, clock, rc) • Hierarchical architecture enables the systematic assembly of many different systems

  5. ESMF Releases 2002 2003 2004 2005 2006 2007 2008 2009 2010 ESMF v1 Prototype ESMF v2 Components, VM and Utils ESMF_GridCompRun() ESMF v3 Index Space Operations ESMF_ArraySparseMatMul() ESMF v4 Grid Operations ESMF_GridCreate() ESMF_FieldRegrid() ESMFv5 Standardization Build, init, data types, error handling, … ESMF v2.2.2r ESMF v3.0.1

  6. Earth System Curator • NSF-funded (leads NCAR ESMF/ESG, GFDL, MIT, GA Tech), just starting second year • Developing a set of tools that allows climate modelers to: • archive and query models, experiments, model components, and model output • test the technical compatibility of model components • assemble and run multi-component models • Prerequisite is metadata development – Curator works closely with European groups and PCMDI to develop international conventions for model architecture, coupling specifications, and grids

  7. Curator Architecture • The three pieces of the of the Curator architecture are: • CDP Curator, a catalog of models, components and data (based on existing NCAR/DOE CDP/ESG BasePortal Technology) • Satellite sites which house software for assembly and execution of modeling experiments (based on GFDL FMS Runtime Environment) • Provider sites that supply models and components to the CDP Curator via a web service interface • Compatibility checking and automated assembly rely on ESMF standard interfaces • For more information - http://www.earthsystemcurator.org

  8. Curator Architecture CDP Curator • Metadata used for • description • search • specification • compatibility checking • auto-assembly Component & Data Catalog query download Data store based on Community Data Portal Push metadata , source code and data Satellite Sites Provider Sites Modeling Environment Provide Components, Models, Data, Metadata assemble configure Web service for metadata preparation and upload to CDP Curator prep metadata run upload Run-time environment Based on GFDL FRE postprocess archive

  9. Infrastructure Challenges How do we increase model interoperability throughout a broad community beyond what ESMF alone can do? And how do we define and measure success? NEED: Broadly accepted conventions and metrics for modeling component interoperability • What level of interoperability is desired, and what is required to achieve it - time and sequencing rules, metadata … ? Balance with effort and intrusiveness? • Would ESMF compliance standards and “certification” be useful or threatening to modelers (or both?) • How deep does ESMF need to go to be useful (high level wrappers? physics/dycores? parameterizations?) • What metrics best measure interoperability? MAPL, Curator, MAPME no interface standards ESMF automation

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