INVESTIGADORES
EUILLADES Pablo Andres
artículos
Título:
A global database of composite volcano morphometry
Autor/es:
GROSSE, PABLO; PABLO EUILLADES; LEONARDO D. EUILLADES; BENJAMIN VAN WYK DE VRIES
Revista:
BULLETIN OF VOLCANOLOGY
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014 vol. 76 p. 1 - 16
ISSN:
0258-8900
Resumen:
We present a global database on the subaerial morphometry of composite volcanoes. Data was extracted from
the 90-m resolution Shuttle Radar Topography Mission
(SRTM) digital elevation model (DEM). The 759 volcanoes
included in the database are the composite (i.e., polygenetic)
volcanoes listed in the Smithsonian Institution Global
Volcanism Program (GVP) database that are covered by the
SRTM DEM, have a constructional topography and a basal
width larger than 2 km. The extent of each volcano edifice was
defined using the NETVOLC algorithm, which computes
outlines by minimizing a cost function based on breaks in
slope around the edifices. Morphometric parameters were then
calculated using the MORVOLC algorithm. The parameters
characterize and quantify volcano size (basal width, summit
width, height, and volume), profile shape (height/basal width
and summit width/basal width ratios), plan shape (ellipticity
and irregularity indexes), and slopes. In addition, 104 welldefined and relatively large summit craters/calderas were
manually delineated and specific parameters were computed.
Most parameters show large variation without clear separations,
indicating a continuum of volcano morphologies. Large overlap between the main GVP morphologic types highlights the
need for a more rigorous quantitative classification of volcano
morphology. The database will be maintained and updated
through a website under construction.