Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations

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dc.contributor.authorFauchereau, N
dc.contributor.authorPegram, G G S
dc.contributor.authorSinclair, S
dc.date.accessioned2021-10-08T07:04:14Z
dc.date.available2021-10-08T07:04:14Z
dc.date.issued2008
dc.description.abstractEmpirical Mode Decomposition (EMD) is applied here in two dimensions over the sphere to demonstrate its potential as a data-adaptive method of separating the different scales of spatial variability in a geophysical (climatological/meteorological) field. After a brief description of the basics of the EMD in 1 then 2 dimensions, the principles of its application on the sphere are explained, in particular via the use of a zonal equal area partitioning. EMD is first applied to an artificial dataset, demonstrating its capability in extracting the different (known) scales embedded in the field. The decomposition is then applied to a global mean surface temperature dataset, and we show qualitatively that it extracts successively larger scales of temperature variations related, for example, to topographic and large-scale, solar radiation forcing. We propose that EMD can be used as a global data-adaptive filter, which will be useful in analysing geophysical phenomena that arise as the result of forcings at multiple spatial scales.
dc.identifier.apacitationFauchereau, N., Pegram, G. G. S., & Sinclair, S. (2008). Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations. <i>Hydrology and Earth System Sciences Discussions</i>, 5(1), 405 - 435. http://hdl.handle.net/11427/34459en_ZA
dc.identifier.chicagocitationFauchereau, N, G G S Pegram, and S Sinclair "Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations." <i>Hydrology and Earth System Sciences Discussions</i> 5, 1. (2008): 405 - 435. http://hdl.handle.net/11427/34459en_ZA
dc.identifier.citationFauchereau, N., Pegram, G.G.S. & Sinclair, S. 2008. Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations. <i>Hydrology and Earth System Sciences Discussions.</i> 5(1):405 - 435. http://hdl.handle.net/11427/34459en_ZA
dc.identifier.issn1812-2108
dc.identifier.issn1812-2116
dc.identifier.ris TY - Journal Article AU - Fauchereau, N AU - Pegram, G G S AU - Sinclair, S AB - Empirical Mode Decomposition (EMD) is applied here in two dimensions over the sphere to demonstrate its potential as a data-adaptive method of separating the different scales of spatial variability in a geophysical (climatological/meteorological) field. After a brief description of the basics of the EMD in 1 then 2 dimensions, the principles of its application on the sphere are explained, in particular via the use of a zonal equal area partitioning. EMD is first applied to an artificial dataset, demonstrating its capability in extracting the different (known) scales embedded in the field. The decomposition is then applied to a global mean surface temperature dataset, and we show qualitatively that it extracts successively larger scales of temperature variations related, for example, to topographic and large-scale, solar radiation forcing. We propose that EMD can be used as a global data-adaptive filter, which will be useful in analysing geophysical phenomena that arise as the result of forcings at multiple spatial scales. DA - 2008 DB - OpenUCT DP - University of Cape Town IS - 1 J1 - Hydrology and Earth System Sciences Discussions LK - https://open.uct.ac.za PY - 2008 SM - 1812-2108 SM - 1812-2116 T1 - Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations TI - Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations UR - http://hdl.handle.net/11427/34459 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34459
dc.identifier.vancouvercitationFauchereau N, Pegram GGS, Sinclair S. Empirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations. Hydrology and Earth System Sciences Discussions. 2008;5(1):405 - 435. http://hdl.handle.net/11427/34459.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Oceanography
dc.publisher.facultyFaculty of Science
dc.sourceHydrology and Earth System Sciences Discussions
dc.source.journalissue1
dc.source.journalvolume5
dc.source.pagination405 - 435
dc.source.urihttps://dx.doi.org/10.5194/hess-12-933-2008
dc.subject.otherBurns
dc.subject.otherDisaster Planning
dc.subject.otherHumans
dc.subject.otherMass Casualty Incidents
dc.subject.otherNational Health Programs
dc.subject.otherPractice Guidelines as Topic
dc.subject.otherSocieties, Medical
dc.subject.otherSouth Africa
dc.titleEmpirical Mode Decomposition on the sphere: application to the spatial scales of surface temperature variations
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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