Back to Search Start Over

Geomorphometric comparative analysis of Latin-American volcanoes

Authors :
Matteo Roverato
Sergio Camiz
M. Poscolieri
Source :
Journal of South American earth sciences 76 (2017): 47–62. doi:10.1016/j.jsames.2017.02.011, info:cnr-pdr/source/autori:Camiz S.; Poscolieri M.; Roverato M./titolo:Geomorphometric comparative analysis of Latin-American volcanoes/doi:10.1016%2Fj.jsames.2017.02.011/rivista:Journal of South American earth sciences/anno:2017/pagina_da:47/pagina_a:62/intervallo_pagine:47–62/volume:76
Publication Year :
2017
Publisher :
Elsevier BV, 2017.

Abstract

The geomorphometric classifications of three groups of volcanoes situated in the Andes Cordillera, Central America, and Mexico are performed and compared. Input data are eight local topographic gradients (i.e. elevation differences) obtained by processing each volcano raster ASTER-GDEM data. The pixels of each volcano DEM have been classified into 17 classes through a K-means clustering procedure following principal component analysis of the gradients. The spatial distribution of the classes, representing homogeneous terrain units, is shown on thematic colour maps, where colours are assigned according to mean slope and aspect class values. The interpretation of the geomorphometric classification of the volcanoes is based on the statistics of both gradients and morphometric parameters (slope, aspect and elevation). The latter were used for a comparison of the volcanoes, performed through classes' slope/aspect scatterplots and multidimensional methods. In this paper, we apply the mentioned methodology on 21 volcanoes, randomly chosen from Mexico to Patagonia, to show how it may contribute to detect geomorphological similarities and differences among them. As such, both its descriptive and graphical abilities may be a useful complement to future volcanological studies.

Details

ISSN :
08959811
Volume :
76
Database :
OpenAIRE
Journal :
Journal of South American Earth Sciences
Accession number :
edsair.doi.dedup.....c4713c2daaff5b8bdac43197935a671d