Detecting short-term evolution of Etnean scoria cones: a LIDAR-based approach |
| |
| Authors: | Alessandro Fornaciai Boris Behncke Massimiliano Favalli Marco Neri Simone Tarquini Enzo Boschi |
| |
| Institution: | (1) Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, via della Faggiola, 32, 56126 Pisa, Italy;(2) Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Piazza Roma, 2, 95123 Catania, Italy |
| |
| Abstract: | The 2001 and 2002–2003 flank eruptions on Mount Etna (Italy) were characterized by intense explosive activity which led to
the formation of two large monogenetic scoria cones (one from each eruption) on the upper southern flank of the volcano. Continuous
monitoring of Etna, especially during flank eruptions, has provided detailed information on the growth of these cones. They
differ in genesis, shape, and size. A set of high resolution (1 m) digital elevation models (DEMs) derived from light detection
and ranging (LIDAR) data collected during four different surveys (2004, 2005, 2006, and 2007) has been used to map morphology
and to extract the morphometric parameters of the scoria cones. By comparing LIDAR-derived DEMs with a pre-eruption (1998)
10 m DEM, the volume of the two scoria cones was calculated for the first time. Comparison of the LIDAR-derived DEMs revealed
in unprecedented detail morphological changes during scoria cone degradation. In particular, the morphologically more exposed
and structurally weaker 2002–2003 cone was eroded rapidly during the first few years after its emplacement mainly due to gravitational
instability of slopes and wind erosion. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
