Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current

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dc.contributor.authorBackeberg, B C
dc.contributor.authorBertino, L
dc.contributor.authorJohannessen, J A
dc.date.accessioned2021-10-08T07:08:30Z
dc.date.available2021-10-08T07:08:30Z
dc.date.issued2009
dc.description.abstractA 4th order advection scheme is applied in a nested eddy-resolving Hybrid Coordinate Ocean Model (HYCOM) of the greater Agulhas Current system for the purpose of testing advanced numerics as a means for improving the model simulation for eventual operational implementation. Model validation techniques comparing sea surface height variations, sea level skewness and variogram analyses to satellite altimetry measurements quantify that generally the 4th order advection scheme improves the realism of the model simulation. The most striking improvement over the standard 2nd order momentum advection scheme, is that the Southern Agulhas Current is simulated as a well-defined meandering current, rather than a train of successive eddies. A better vertical structure and stronger poleward transports in the Agulhas Current core contribute toward a better southwestward penetration of the current, and its temperature field, implying a stronger Indo-Atlantic inter-ocean exchange. It is found that the transport, and hence this exchange, is sensitive to the occurrences of mesoscale features originating upstream in the Mozambique Channel and Southern East Madagascar Current, and that the improved HYCOM simulation is well suited for further studies of these inter-actions.
dc.identifier.apacitationBackeberg, B. C., Bertino, L., & Johannessen, J. A. (2009). Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current. <i>Ocean Science</i>, 5(2), 173 - 190. http://hdl.handle.net/11427/34594en_ZA
dc.identifier.chicagocitationBackeberg, B C, L Bertino, and J A Johannessen "Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current." <i>Ocean Science</i> 5, 2. (2009): 173 - 190. http://hdl.handle.net/11427/34594en_ZA
dc.identifier.citationBackeberg, B.C., Bertino, L. & Johannessen, J.A. 2009. Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current. <i>Ocean Science.</i> 5(2):173 - 190. http://hdl.handle.net/11427/34594en_ZA
dc.identifier.issn1812-0784
dc.identifier.issn1812-0792
dc.identifier.ris TY - Journal Article AU - Backeberg, B C AU - Bertino, L AU - Johannessen, J A AB - A 4th order advection scheme is applied in a nested eddy-resolving Hybrid Coordinate Ocean Model (HYCOM) of the greater Agulhas Current system for the purpose of testing advanced numerics as a means for improving the model simulation for eventual operational implementation. Model validation techniques comparing sea surface height variations, sea level skewness and variogram analyses to satellite altimetry measurements quantify that generally the 4th order advection scheme improves the realism of the model simulation. The most striking improvement over the standard 2nd order momentum advection scheme, is that the Southern Agulhas Current is simulated as a well-defined meandering current, rather than a train of successive eddies. A better vertical structure and stronger poleward transports in the Agulhas Current core contribute toward a better southwestward penetration of the current, and its temperature field, implying a stronger Indo-Atlantic inter-ocean exchange. It is found that the transport, and hence this exchange, is sensitive to the occurrences of mesoscale features originating upstream in the Mozambique Channel and Southern East Madagascar Current, and that the improved HYCOM simulation is well suited for further studies of these inter-actions. DA - 2009 DB - OpenUCT DP - University of Cape Town IS - 2 J1 - Ocean Science LK - https://open.uct.ac.za PY - 2009 SM - 1812-0784 SM - 1812-0792 T1 - Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current TI - Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current UR - http://hdl.handle.net/11427/34594 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34594
dc.identifier.vancouvercitationBackeberg BC, Bertino L, Johannessen JA. Evaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current. Ocean Science. 2009;5(2):173 - 190. http://hdl.handle.net/11427/34594.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Oceanography
dc.publisher.facultyFaculty of Science
dc.sourceOcean Science
dc.source.journalissue2
dc.source.journalvolume5
dc.source.pagination173 - 190
dc.source.urihttps://dx.doi.org/10.5194/os-5-173-2009
dc.subject.otherOceanography
dc.subject.otherOcean modelling
dc.subject.otherVDP::Matematikk og Naturvitenskap: 400
dc.subject.otherJournal article
dc.titleEvaluating two numerical advection schemes in HYCOM for eddy-resolving modelling of the Agulhas Current
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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