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Nesting Milestone Materials

Nesting Milestone Materials. Nesting design document Updated NUOPC Layer software prototype bundled with ESMF Updated NUOPC Layer reference manual Nesting prototype examples under SVN, esmfcontrib: Single nested domain within a parent domain Two nested domains within the same parent domain

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Nesting Milestone Materials

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  1. Nesting Milestone Materials • Nesting design document • Updated NUOPC Layer software prototype bundled with ESMF • Updated NUOPC Layer reference manual • Nesting prototype examples under SVN, esmfcontrib: • Single nested domain within a parent domain • Two nested domains within the same parent domain • Two nested domains within the same parent domain, where one of the child domains becomes the parent domain of yet another child generation (telescoping)

  2. Functions of prototype • Extended the architecture in which major components (ATM, OCN, ICE, LND, WAV) are siblings to where multiple instances of the same component can represent nested domains. • A single component definition (Fortran module) is instantiated multiple times to create nested domains. (→ No need to introduce multiple component definitions.) • Two additional component Attributes were introduced to identify the nesting level and sibling order for each instance. • The NUOPC_RunSequence type, introduced as part of the implicit coupling milestone, is leveraged to implement a “flat” representation of domain nesting. • The nested case is driven by the same generic NUOPC_Driver as the explicit and implicit coupling cases before.

  3. Interoperability impact • The nesting problem is addressed by the same familiar data structures used for implicit and explicit coupling. • The same NUOPC rules that apply to mediate between different model components also apply to instances of the same component that represent nested domains. • The same component code (Fortran module) is used to implement multiple nests. This promotes maximum code reuse. • Encoding the interaction of the nested domains through the NUOPC_RunSequence data structure inside a NUOPC_Driver holds the potential to fully encapsulate and hide the nested nature of a model once Driver-in-Driver support is implemented.

  4. More information • See: • http://www.earthsystemmodeling.org/plans/milestone_1209_nuopc.shtml • For additional information on this milestone, including links to NUOPC Layer code, documentation, and supporting design documents.

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