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TitleDetermination of glacier retreat at Nevado del Ruiz, Santa Isabel and Tolima volcanoes, Colombia through optical image and Din-SAR / Estimación del retroceso glaciar en los volcanes Nevado del Ruiz, Tolima y Santa Isabel, Colombia a través de imágenes ópticas y Din-SAR
AuthorMonterroso-Tobar, M F; Londoño-Bonilla, J M; Samsonov, S
SourceDYNA (Revista de la Facultad Nacional de Minas, Universidad Nacional de Colombia) 85, 206, 2018 p. 329-337, https://doi.org/10.15446/dyna.v85n206.66570 (Open Access)
Year2018
Alt SeriesNatural Resources Canada, Contribution Series 20180423
PublisherUniversidad Nacional de Colombia
Documentserial
Lang.English; Spanish
Mediapaper; on-line; digital
File formatpdf (Adobe® Reader®); xml
AreaParque Nacional Natural de Los Nevados; Nevado del Ruiz Volcano; Nevado de Santa Isabel Volcano; Nevado del Tolima Volcano; Colombia
Lat/Long WENS -75.5833 -75.1667 5.0000 4.5833
Subjectsenvironmental geology; hydrogeology; geophysics; glaciers; ice sheets; ice retreat; ice margins; tectonic setting; volcanoes; volcanic ash; remote sensing; satellite imagery; radar methods; spectral analyses; Landsat 8; Radarsat II; differential interferometric synthetic aperture radar (DinSAR); classification; coherence images; optical images; ice caps
Illustrationstables; location maps; geoscientific sketch maps; satellite images; bar graphs
ProgramMethodology, Remote Sensing Science
Released2018 09 01
AbstractWe performed a quantification of glacier retreat of Nevado del Ruiz Volcano (VNR), Nevado de Santa Isabel Volcano (VNSI) and Nevado del Tolima Volcano (VNT), using satellite images Landsat 8 OLI TIRS and coherence images obtained by DinSAR technique of Radarsat II images. Spectral indexes and supervised image classification were calculated to differentiate the ice boundary. Between 2010 and 2015 the ice sheet of the volcanoes under study has retreated 24%, 42% and 60% respectively. The coherence images show similar results as those obtained by optical images. The use of coherence images can be used for the delimitation of ice and rock in glacial areas. The ash on the ice sheet is a particular phenomenon on the VNR ice cap, which complicates the delimitation of the glacier surface for that volcano.
GEOSCAN ID313771