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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/32876

    Título
    Influence of air parcel trajectories on CO2 and CH4 concentrations in the northern plateau of the Iberian Peninsula
    Autor
    Pérez Bartolomé, Isidro AlbertoAutoridad UVA Orcid
    Sánchez Gómez, María LuisaAutoridad UVA Orcid
    García Pérez, María ÁngelesAutoridad UVA
    Pardo Gómez, NuriaAutoridad UVA
    Año del Documento
    2018
    Editorial
    PERGAMON-ELSEVIER
    Documento Fuente
    Journal of Atmospheric and Solar-Terrestrial Physics, 2018 167 p. 58–65
    Zusammenfassung
    This study presents a simpler procedure for grouping air parcel back trajectories than others previously applied. Two-day air parcel back trajectories reaching an unpolluted site in the centre of the northern plateau of the Iberian Peninsula were calculated over a three-year period using the METEX model. A procedure based on the kernel density calculation was applied to the direction of each trajectory centroid to determine groups of trajectories. This method is much faster than the cluster procedure when it comes to retaining the directional details of groups. Seasonal analysis of six groups of trajectories revealed that the Atlantic origin prevailed against displacement from northern Europe. Moreover, Mediterranean and particularly African trajectories were infrequent, probably due to the rough peninsular orography in these directions. The location of air trajectories reaching the study site was described using a surface classification below the air parcels with improved spatial resolution compared to previous analyses. Local contribution was very marked, particularly in summer. Mean trajectories were calculated for each group together with meteorological features and CO2 and CH4 concentrations. Groups may be identified by their mean temperature, wind speed, elevation and distance values. However, only two groups should be considered when analysing the two trace gases, one for trajectories from the Atlantic Ocean and the second for trajectories from the continent. Contrasts of about 4 ppm for CO2 in summer and 0.023 ppm for CH4 in winter were observed, revealing that air trajectories from the Atlantic Ocean were cleaner than those arriving from the continent. These differences were attributed to higher air stagnation over land.
    Palabras Clave
    METEX
    South-western Europe
    Carbon dioxide
    Methane
    ISSN
    1364-6826
    Revisión por pares
    SI
    DOI
    10.1016/j.jastp.2017.10.015
    Patrocinador
    the Ministry of Economy and Competitiveness and ERDF funds (projects CGL2009-11979 and CGL2014-53948-P)
    Propietario de los Derechos
    Elsevier
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/32876
    Derechos
    restrictedAccess
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