title: Correlation of the seasonal isotopic amplitude of precipitation with annual evaporation and altitude in alpine regions.
abstract: The time series of stable water isotope composition relative to IAEA-GNIP meteorological stations located in alpine zones are analyzed in order to study how the amplitude of the seasonal isotopic composition of precipitation (Aδ) varies along a vertical transect. A clear relationship between Aδ and local evaporation is obtained, with slopes of -0.87 ‰/100mm/yr and -7.3 ‰/100mm/yr for Aδ(18)O and Aδ(2)H, respectively. When all sampling points of the vertical transect receive the same moisture sources, then a linear relationship between Aδ and elevation is obtained, with vertical gradients of 0.16 ‰/100mm/yr and 1.46 ‰/100mm/yr forAδ(18)O and Aδ(2)H, respectively.
authors.affiliation: Department of Civil Engineering and Environment, Technical University of Catalonia (UPC), Barcelona, Spain. Electronic address: jjb.aquageo@gmail.com.
authors.forename: J
authors.initials: J
authors.lastname: Jódar
authors.affiliation: Department of Civil Engineering and Environment, Technical University of Catalonia (UPC), Barcelona, Spain. Electronic address: emilio.custodio@upc.edu.
authors.forename: E
authors.initials: E
authors.lastname: Custodio
authors.affiliation: Dipartimento di Scienze e Tecnologie Ambientali Biologiche e Farmaceutiche, Seconda Università di Napoli, Caserta, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, Italy. Electronic address: marcello.liotta@unina2.it.
authors.forename: M
authors.initials: M
authors.lastname: Liotta
authors.affiliation: Geological Institute of Spain (IGME), Spain. Electronic address: javier.lamban@igme.es.
authors.forename: L J
authors.initials: LJ
authors.lastname: Lambán
authors.affiliation: Departamento de Ciencias Geológicas, Universidad Católica del Norte UCN), Antofagasta, Chile; Centro para el Desarrollo de Tecnologías de Explotación Sustentable de Recursos Hídricos en Zonas Áridas (CEITSAZA), Antofagasta, Chile. Electronic address: cherrera@ucn.cl.
authors.forename: C
authors.initials: C
authors.lastname: Herrera
authors.affiliation: Geological Institute of Spain (IGME), Spain. Electronic address: s.martos@igme.es.
authors.forename: S
authors.initials: S
authors.lastname: Martos-Rosillo
authors.affiliation: Departamento del Agua, Centro Universitario Región Litoral Norte, Universidad de la República del Uruguay, Salto, Uruguay. Electronic address: gsapriza@gmail.com.
authors.forename: G
authors.initials: G
authors.lastname: Sapriza
authors.affiliation: Meteorological Service of Catalonia, Barcelona, Spain. Electronic address: tomeur@meteo.cat.
authors.forename: T
authors.initials: T
authors.lastname: Rigo
keywords: Alpine precipitation; Environmental isotopes; Evaporation; Moisture source regions; Seasonal isotopic amplitude