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Title:	A compositional approach to stable isotope data analysis
Author:	Tolosana Delgado, Raimon; Otero Pérez, Neus; Soler i Gil, Albert
Other authors:	Mateu i Figueras, Glòria; Barceló i Vidal, Carles; Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada
Abstract:	Isotopic data are currently becoming an important source of information regardingsources, evolution and mixing processes of water in hydrogeologic systems. However, itis not clear how to treat with statistics the geochemical data and the isotopic datatogether. We propose to introduce the isotopic information as new parts, and applycompositional data analysis with the resulting increased composition. Results areequivalent to downscale the classical isotopic delta variables, because they are alreadyrelative (as needed in the compositional framework) and isotopic variations are almostalways very small. This methodology is illustrated and tested with the study of theLlobregat River Basin (Barcelona, NE Spain), where it is shown that, though verysmall, isotopic variations comp lement geochemical principal components, and help inthe better identification of pollution sources
Abstract:	Geologische Vereinigung; Institut d’Estadística de Catalunya; International Association for Mathematical Geology; Patronat de l’Escola Politècnica Superior de la Universitat de Girona; Fundació privada: Girona, Universitat i Futur; Càtedra Lluís Santaló d’Aplicacions de la Matemàtica; Consell Social de la Universitat de Girona; Ministerio de Ciencia i Tecnología.cat
Publication date:	2009-04-01
Subject(s):	-Isòtops -Estadístiques
Rights:	Consulteu les condicions d'ús d'aquest document en el repositori original:http://hdl.handle.net/10256/710
Document type:	Conference Object
Published by:	Universitat de Girona. Departament d’Informàtica i Matemàtica Aplicada
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