CODAMAT: a modern analogue techinque for compositional data
dc.contributor.author
dc.contributor.editor
dc.date.accessioned
2008-05-14T10:08:00Z
dc.date.available
2008-05-14T10:08:00Z
dc.date.issued
2008-05-28
dc.identifier.citation
'CODAMAT: a modern analogue techinque for compositional data' a CODAWORK’08. Girona: La Universitat, 2008 [consulta: 16 maig 2008]. Necessita Adobe Acrobat. Disponible a Internet a: http://hdl.handle.net/10256/739
dc.identifier.uri
dc.description.abstract
The quantitative estimation of Sea Surface Temperatures from fossils assemblages is a
fundamental issue in palaeoclimatic and paleooceanographic investigations. The
Modern Analogue Technique, a widely adopted method based on direct comparison of
fossil assemblages with modern coretop samples, was revised with the aim of
conforming it to compositional data analysis. The new CODAMAT method was
developed by adopting the Aitchison metric as distance measure. Modern coretop
datasets are characterised by a large amount of zeros. The zero replacement was carried
out by adopting a Bayesian approach to the zero replacement, based on a posterior
estimation of the parameter of the multinomial distribution. The number of modern
analogues from which reconstructing the SST was determined by means of a multiple
approach by considering the Proxies correlation matrix, Standardized Residual Sum of
Squares and Mean Squared Distance. This new CODAMAT method was applied to the
planktonic foraminiferal assemblages of a core recovered in the Tyrrhenian Sea.
Kew words: Modern analogues, Aitchison distance, Proxies correlation matrix,
Standardized Residual Sum of Squares
dc.description.sponsorship
Geologische Vereinigung; Institut d’Estadística de Catalunya; International Association for Mathematical Geology; Càtedra Lluís Santaló d’Aplicacions de la Matemàtica; Generalitat de Catalunya, Departament d’Innovació, Universitats i Recerca; Ministerio de Educación y Ciencia; Ingenio 2010.
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada
dc.rights
Tots els drets reservats
dc.subject
dc.title
CODAMAT: a modern analogue techinque for compositional data
dc.type
info:eu-repo/semantics/conferenceObject
dc.rights.accessRights
info:eu-repo/semantics/openAccess