Rémy Dominique auteur aut IRD Chen Yu auteur aut IRD Froger J. L. auteur aut IRD Bonvalot Sylvain auteur aut IRD Cordoba L. auteur aut IRD Fustos J. auteur aut IRD text journalArticle eng text/pdf born digital access We analyzed C band and L band interferometric synthetic aperture radar (InSAR) data acquired from 2003 to 2011 to search for volcanic deformations at Llaima volcano, Southern Andes (38.69 degrees S, 71.73 degrees W). There, specific environmental conditions (steep slopes, snow- or ice-capped summit, dense vegetation cover, and strong tropospheric artifacts) and limited amount of radar data available make it challenging to accurately measure ground surface displacement with InSAR. To overcome these difficulties, we first performed a careful analysis of the water vapor variations using Medium-Resolution Imaging Spectrometer and Moderate Resolution Imaging Spectroradiometer near-infrared water vapor products and then we inverted wrapped interferograms for both topographic correlated phase delays and a simple model source strength. In the light of our results, we conclude that there is no detectable ground displacement related to a deep magmatic source for the 2003-2011 period and that most of the fringes observed in the interferograms were produced by tropospheric delays. specialized InSAR atmospheric artifacts volcano ground deformation CHILI ANDES 066 064 126 42 10 3870-3879 2015 0094-8276 https://www.documentation.ird.fr/hor/fdi:010064737 10.1002/2015gl063872 0094-8276 [F B010064737] https://www.documentation.ird.fr/hor/fdi:010064737 https://www.documentation.ird.fr/intranet/publi/2015/07/010064737.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-07-29 2021-07-13 fdi:010064737 fre