TY - JOUR
T1 - Geomorphometric comparative analysis of Latin-American volcanoes
AU - Camiz, Sergio
AU - Poscolieri, Maurizio
AU - Roverato, Matteo
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/7/1
Y1 - 2017/7/1
N2 - 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.
AB - 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.
KW - Andes
KW - ASTER-DEM
KW - Central-America
KW - Classification
KW - Comparison
KW - Geomorphometry
KW - Local topographic gradients
KW - Mexico
KW - Volcanoes
UR - http://www.scopus.com/inward/record.url?scp=85014715661&partnerID=8YFLogxK
U2 - 10.1016/j.jsames.2017.02.011
DO - 10.1016/j.jsames.2017.02.011
M3 - Article
AN - SCOPUS:85014715661
SN - 0895-9811
VL - 76
SP - 47
EP - 62
JO - Journal of South American Earth Sciences
JF - Journal of South American Earth Sciences
ER -