Earth System Modeling Framework

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Earth System Modeling Framework
Documenting and comparing models using Earth
System Curator
Sylvia Murphy murphys_at_ucar.eduJulien Chastang
chastang_at_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
XML File
ESMF enables self-describing model components
XML validated, converted to Java Objects and
uploaded into ESG Database
Models export metadata as part of the global
attributes of the history files
ESG database harvested and placed into Sesame
store
Metadata harvested as part of the publication
process and placed in 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.edu28080/query/queryResultsSync.h
  tm?idesg3amodel_ccsm_3
• Scientific Properties
• http//cdp.ucar.edu28080/query/queryResultsSync.h
  tm?idesg3amodelcomponent_gef_dycore
• Component Hierarchy
• http//cdp.ucar.edu28080/query/queryResultsSync.h
  tm?idesg3amodel_geos_5

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Component ComparisonTable

• Select model components
• Select criteria
• Table generated dynamically
• Eventually selections can be placed in a users
  saved workspace

http//cdp.ucar.edu28080/query/modelComparison.ht
m
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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