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The Earth System Curator

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What is the Earth System Curator? ... Earth System Modeling Framework (ESMF) Software infrastructure to facilitate building numerical Earth System models ... – PowerPoint PPT presentation

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Title: The Earth System Curator


1
The Earth System Curator
  • Metadata Infrastructure for Climate Modeling
  • Rocky Dunlap
  • Georgia Tech

2
What is the Earth System Curator?
  • The goal of Curator is to link climate datasets
    with a detailed description of the model that ran
    to produce the dataset
  • Use cases for climate model metadata
  • Provenance (history of what happened)
  • Archival and search (for models and datasets)
  • Model inter-comparison
  • Compatibility checking
  • Generation of coupler components

3
Collaborators
  • Earth System Modeling Framework (ESMF)
  • Software infrastructure to facilitate building
    numerical Earth System models
  • Component-based model development
  • Built in tools for managing common modeling tasks
    (coupling fields, calendars, grid creation, etc).
  • Earth System Grid (ESG)
  • A large scale distributed portal for hosting data
    produced by Earth System models
  • Services such as dataset ingest, faceted search,
    dataset browsing, viewing metadata, downloading
    datasets

4
Getting Model Metadata into ESG
  • ESMF modeling components are self-describing
  • Metadata is exported from an ESMF component in
    XML format
  • The XML is ingested into ESG and exposed to the
    data portal
  • Users discover components and datasets via the
    portal

5
Metadata Lifecycle
6
Metadata Lifecycle
  • ESMF component exports XML metadata
  • The XML is validated and harvested into a Java
    object representation
  • The Java objects are persisted to a relational
    database (RDBMS)
  • Metadata in the RDBMS is then harvested into RDF
    a Semantic Web ontology language
  • The RDF is accessed by the ESG web portal for
    faceted search of the metadata

7
ESMF XML Output (example)
ltmodel_component name"Finite Volume Dynamical
Core"gt ltdiscipline_setgt ltdiscipline
name"Atmosphere" /gt lt/discipline_setgt
ltphysical_domain_setgt ltphysical_domain
nameEarth system" /gt lt/physical_domain_setgt
ltagency_setgt ltagency name"NASA" /gt
lt/agency_setgt ltinstitution_setgt
ltinstitution name"Global Modeling and
Assimilation Office (GMAO)" /gt
lt/institution_setgt
XML output will be available on next ESMF release
8
ESMF XML Output (example)
ltauthor_setgt ltauthor name"Max
Suarez" /gt lt/author_setgt
ltcoding_language_setgt ltcoding_language
name"Fortran 90" /gt lt/coding_language_setgt
ltmodel_component_framework_setgt
ltmodel_component_framework name"ESMF (Earth
System Modeling Framework)" /gt
lt/model_component_framework_setgt
ltvariable_setgt ltvariable
shortname"DPEDT" longname"Edge pressure
tendency" units"Pa s-1" /gt ltvariable
shortname"DUDT" longname"Eastward wind
tendency" units"m s-2" /gt
lt/variable_setgt lt/model_componentgt
9
Faceted search
Harvested component
ESG Prototype Data Portal
10
ESG Prototype Data Portal
11
ESG Prototype Data Portal
12
Demo of Dycore Portal
http//dycore.ucar.edu/
13
Technical Challenges Along the Way
  • Web-based systems often deal with a lot of data
    formats. This requires lots of translations.
  • XML ? Java objects ? relational database ? RDF
  • Collaborative ontology development is
    challenging. There is a need for both governance
    structures and tools.
  • This will continue to affect all areas of
    e-science

14
Future Work for Curator
  • Continue working with ESG to add more
    sophisticated metadata to the portal
  • ESMF components to export more detailed XML
  • Collaborate with international partners for
    designing metadata that can be used by a wide
    audience
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