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dc.contributor.author
Nino Ruiz, Elias D.
dc.contributor.author
Consuegra Ortega, Randy S.
dc.contributor.author
Lucini, María Magdalena
dc.date.available
2024-07-16T15:06:17Z
dc.date.issued
2023-02
dc.identifier.citation
Nino Ruiz, Elias D.; Consuegra Ortega, Randy S.; Lucini, María Magdalena; Ensemble based methods for leapfrog integration in the simplified parameterizations, primitive‐equation dynamics model; John Wiley & Sons Ltd; Quarterly Journal of the Royal Meteorological Society; 149; 751; 2-2023; 573-587
dc.identifier.issn
0035-9009
dc.identifier.uri
http://hdl.handle.net/11336/240092
dc.description.abstract
This paper presents efficient and practical implementations of sequential dataassimilation methods for the Simplified Parameterizations, primitive-EquationDYnamics (SPEEDY) Model, a well-known numerical model, into the dataassimilation community for climate prediction. In the SPEEDY model, the timeevolution of dynamics is performed via the second-order Leapfrog integrationscheme; this time integrator relies on two steps: the position and the velocity. Thecomputational implementation of SPEEDY blends the time integrator and thespatial discretization of dynamics to accelerate algebraic computations. Thus,there is no access to the right-hand side function of the ordinary differentialequations governing the time evolution of model dynamics. Consequently, theSPEEDY model is often treated as a black box wherein positions and velocitieswork as inputs and outputs. Since observations in operational data assimilationonly match position states, we can exploit augmented vector states to propagateanalysis innovations frompositions to velocities. For this purpose, we formulatethree variants of ensemble-based filters and perform numerical experiments toassess their accuracies.We consider two scenarios for the experiments: an idealcase wherein positions and velocities can be observed and a more realistic onewherein measurements are only accessible for position states. Besides, we discussthe effects of the ensemble size on the accuracies of our formulations and,even more, the typical case in which velocities are not updated across assimilationsteps. The results reveal that all filter formulations? accuracies remainthe same in terms of Root-Mean-Square-Error by neglecting observations fromvelocities (a realistic scenario) even for cases wherein the number of measurementsdecreases to 6% of model components. Furthermore, for all discussedfilter implementations, the propagation of analysis increments from positionto velocities improves up to 100% the performance of filter implementationswherein velocities are not updated, a typical operational scenario.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ATMOSPHERIC GENERAL CIRCULATION MODEL
dc.subject
ENKF
dc.subject
LEAPFROG INTEGRATOR
dc.subject
LETKF
dc.subject.classification
Matemática Aplicada
dc.subject.classification
Matemáticas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Ensemble based methods for leapfrog integration in the simplified parameterizations, primitive‐equation dynamics model
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-07-16T12:27:26Z
dc.journal.volume
149
dc.journal.number
751
dc.journal.pagination
573-587
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Nino Ruiz, Elias D.. Universidad del Norte; Colombia
dc.description.fil
Fil: Consuegra Ortega, Randy S.. Universidad Nacional del Nordeste; Argentina
dc.description.fil
Fil: Lucini, María Magdalena. Universidad Nacional del Nordeste; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste; Argentina
dc.journal.title
Quarterly Journal of the Royal Meteorological Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/qj.4424
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/qj.4424
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