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Earth System Modeling Framework

Documenting and comparing models using Earth System Curator

Sylvia Murphy: murphys@ucar.eduJulien Chastang: chastang@ucar.edu

http://www.esmf.ucar.edu

http://www.earthsystemcurator.org/

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Introduction and Motivation

The Earth System Curator project, in partnership with the Earth System Grid (EG), is building a web portal that links model components and data together via metadata.

The portal enables components, models, simulations, and data to be searched, browsed, downloaded, and compared.

This is especially useful for Model Intercomparison Projects (MIPS) and Model Component Intercomparison Projects.

The portal is planned for use in IPCC AR5 as part of ESG. An prototype will be used to support an NCAR summer 2008

colloquium on the comparison of atmospheric dynamical cores.

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ESMF to Curator Metadata Workflow

ESMF enables self-describing model components

XML File XML validated, converted to Java Objects and uploaded into ESG Database

Models export metadata as part of the global attributes of the history files

Metadata harvested as part of the publication process and placed in Sesame store

ESG database harvested and placed into Sesame store

Metadata presented via ESG search and trackback pages

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ESMF Metadata

Metadata encoded using the Attribute class In ESMF v3.1.1, users will be able to create standard Attribute

packets, for example for Field: Long_name Units Short_name

Field and Array metadata can be aggregated into FieldBundle, ArrayBundle, and State metadata

Component Attributes done by the end of the summer Current output is a tab-delimited text file. Future plans include

validatable XML

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ESG Faceted Search

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Example Trackback Pages

Model Distribution: http://cdp.ucar.edu:28080/query/queryResultsSync.htm?id=esg%3amod

el_ccsm_3

Scientific Properties: http://cdp.ucar.edu:28080/query/queryResultsSync.htm?id=esg

%3amodelcomponent_gef_dycore

Component Hierarchy: http://cdp.ucar.edu:28080/query/queryResultsSync.htm?id=esg

%3amodel_geos_5

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Component ComparisonTable

Select model components Select criteria Table generated dynamically Eventually selections can be placed in a user’s saved

workspace

http://cdp.ucar.edu:28080/query/modelComparison.htm

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ASP 2008 Colloquium: Numerical Techniques for Global Atmospheric

Models 11 modeling groups with 13 atmospheric dycore components Running 22 test cases at up to 5 resolutions Component comparison table Automated upload of simulation data, publishing, and

comparison Current PCMDI tables are static, hard-coded, non-searchable

Data search and browse via ESG Gateway Presentation on use of metadata for MIPs for student attendees

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Questions?

http://www.esmf.ucar.edu