Title Dynamics of "avalanching glaciers"; the case of the serac on Punta San Matteo (Forni Glacier, Valtellina, Italy) [Dinamica degli "avalanching glaciers"; il caso del seracco della Punta S. Matteo (Ghiacciaio dei Forni, Valtellina, Italia)]
Author Riccardi, A.; Scotti, R.; Sgrenzaroli, M.; Vassena, G.; Smiraglia, C.
Author Affil Riccardi, A., Universita di Milano, Dipartimento di Scienze della Terra "A. Desio", Milan, Italy. Other: Servizio Glaciologico Lombardo, Italy; Gexcel, Italy; Universita di Brescia, Italy
Source Memorie della Societa Geografica Italiana, 87(2), p.545-556, ; II convegno nazionale A. I. Geo, Turin, Italy, March 28- 30, 2007, V. Agnesi. Publisher: Societa Geografica Italiana, Rome, Italy. ISSN: 0391- 5190
Publication Date 2009
Notes In Italian with English summary. 17 refs. GeoRef Acc. No: 308654
Index Terms avalanches; geomorphology; geophysical surveys; glaciers; ice; lasers; mass movements (geology); photography; surveys; Alps; Italy--Valtellina; Europe; Forni Glacier; geologic hazards; geophysical methods; glacial features; Italy; laser methods; Lombardy Italy; mass movements; monitoring; natural hazards; Punta San Matteo; seracs; Southern Europe; Valtellina
Abstract Avalanching glaciers may be affected by periodic or occasional falls of ice (by breaking-off mechanism) giving rise to tragic events. These events have been rising the interest in the instability of avalanching glaciers. This contribution comes into this context. In summer 2003 a big fracture was observed on the North wall of Punta S. Matteo (Forni Glacier, Ortles-Cevedale Group, Italy). As this phenomenon developed a big unstable ice-mass, starting from May 2005, it was decided to survey Monte S. Matteo avalanching glacier (whose fall could involve the West sector of Forni Glacier thus representing an actual hazard for climbers, tourists, skiers and trekkers). The monitoring campaign consisted in collecting photographs (from May 2005 to March 2007) and in surveying the ice mass by total station (from July 2005 to November 2005). In addition, in May 2005 a laser scanner survey was performed. The collected photographs made it possible to draw the evolution of this unstable ice-mass. Data acquired with total station permitted to calculate displacements, velocities and flow direction of the unstable ice-mass. The laser scanner survey permitted to calculate the volume of the unstable ice- mass. Furthermore the role of air temperature conditions in the ice-mass evolution was also investigated.
Publication Type conference paper or compendium article
Record ID 65005531