Earth System Modeling Framework: Difference between revisions

Revision as of 23:56, 16 November 2016

Revision as of 00:44, 17 March 2017

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{{nomore footnotes|date=October 2016}}

The '''Earth System Modeling Framework''' ('''ESMF''') is [[open source software]] for building [[Climate model|climate]], [[numerical weather prediction]], [[data assimilation]], and other [[Earth science]] [[software applications]]. These applications are computationally demanding and usually run on [[supercomputers]]. The ESMF is considered a technical layer, integrated into a sophisticated [[common modeling infrastructure]] for [[interoperability]]. Other aspects of interoperability and shared infrastructure include: common experimental protocols, common analytic methods, common documentation standards for data and data provenance, shared workflow, and shared model components.<ref>{{cite web|url=http://cpo.noaa.gov/sites/cpo/MAPP/Webinars/2014/03-31-14/Balaji.pdf|title=Scientific Basis for Common Infrastructure|author=NOAA/CPO MAPP|date=March 31, 2014|page=15}}</ref>

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===Capabilities===

ESMF represents user data in the form of [[data object]]s such as grids, fields, and arrays. The user data within a component may be copied or referenced into these ESMF objects. Once user data is part of an ESMF data object, framework methods can be used to transform and transfer the data as required to other components in the system. This generally happens within a coupler component.

Grid [[interpolation]] and remapping are core utilities of ESMF. Interpolation weights can be generated in ESMF using [[bilinear interpolation]], finite element patch recovery, and conservative remapping methods.

ESMF can associate [[metadata]] with data objects. The metadata, in the form of name and value pairs, is grouped into packages, which can be written out in [[XML]] and other standard formats. ESMF metadata packages are based on community conventions including the [[Climate and Forecast Metadata Conventions]] and the [[METAFOR]] Common Information Model.

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During the period of NASA funding, the ESMF team developed a prototype of the framework and used it in a number of experiments that demonstrated coupling of modeling components from different institutions. ESMF was also used as the basis for the construction of a new model, the GEOS-5 atmospheric [[general circulation model]] at [[NASA Goddard]].

As the end of the first funding cycle for ESMF neared, its collaborators wrote a project plan that described how ESMF could transition to an organization with multi-agency sponsorship for its next funding cycle. Major new five-year grants came from NASA, through the Modeling Analysis and Prediction (MAP) program for [[climate change]] and variability, and from the [[United States Department of Defense|Department of Defense]] [[Battlespace]] Environments Institute. The [[National Science Foundation]] (NSF) continued funding part of the development team through [[NCAR]] core funds. Many smaller ESMF-based application adoption projects were funded in domains as diverse as [[space weather]] and [[sediment]] transport.

Also at the end of the first funding cycle, the ESMF collaborators wrote a white paper on future directions for the ESMF. This paper formed the basis for a proposal to NSF to combine ESMF (and other software frameworks) with data services to create a computational environment that supports an end-to-end modeling [[workflow]].

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== Further reading ==

*{{Cite journal|doi=10.1177/1094342005056120|title=Design and Implementation of Components in the Earth System Modeling Framework|journal=International Journal of High Performance Computing Applications|volume=19|issue=3|pages=341|year=2005|authorsauthor=N. Collins; |author2=G. Theurich; |author3=C. DeLuca; |author4=M. Suarez; |author5=A. Trayanov; |author6=V. Balaji; |author7=P. Li; |author8=W. Yang; |author9=C. Hill; |author10=A. da Silva}}

*{{Cite journal|doi=10.1109/MCISE.2004.1255817|title=The architecture of the earth system modeling framework|journal=Computing in Science & Engineering|volume=6|pages=18|year=2004|last1=Hill|first1=C.|last2=Deluca|first2=C.|last3=Balaji|last4=Suarez|first4=M.|last5=Da Silva|first5=A.}}

*{{Cite journal|doi=10.1007/s12145-008-0016-1|title=Earth system curator: Metadata infrastructure for climate modeling|journal=Earth Science Informatics|volume=1|issue=3–4|pages=131-149131–149|year=2008|last1=Dunlap|first1=Rocky|last2=Mark|first2=Leo|last3=Rugaber|first3=Spencer|last4=Balaji|first4=V.|last5=Chastang|first5=Julien|last6=Cinquini|first6=Luca|last7=Deluca|first7=Cecelia|last8=Middleton|first8=Don|last9=Murphy|first9=Sylvia}}

==External links==

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{{Atmospheric, Oceanographic and Climate Models|state=expanded}}

{{Computer modeling}}

[[Category:Weather prediction]]

[[Category:Numerical climate and weather models]]