PERSONAL DE APOYO
FERRI HIDALGO Lidia
capítulos de libros
Título:
3.2 Special events
Autor/es:
L. E. ESPIZUA, P. PITTE AND L. FERRI HIDALGO
Libro:
Fluctuations of Glaciers 2000-2005 Vol IX
Editorial:
ICSU (FAGS) IUGG (IACS) UNEP UNESCO WMO
Referencias:
Lugar: Zurich; Año: 2007;
Resumen:
Horcones Inferior (AR 5006) glacier surge
L. E. Espizua, P. Pitte and L. Ferri Hidalgo (IANIGLA)
The Horcones Inferior glacier is located at 32º40´S latitude and 70º00´W longitude at the
south wall of Cerro Aconcagua (6,959 m a.s.l.), the highest peak in the Western
Hemisphere. It is a valley glacier covered by debris with thermokarst features, that
flows to the southeast. Between 1963 and 1984 the glacier front position did not show
significant changes. The glacier had a surge between 1984 and 1986 and stopped in
1989. It was about 10,5 km long between 1990 and 1997. From 1997 to 1999 the
glacier retreated 130 m based on field observation (Happold and Schrott, 1993; Unger et
al., 2000; 2005). A new surge event occurred in 2004. The evolution of the surge front
was detected through analysis of Landsat images and field observations. We can not
establish the exact time when the surge began, but on the image of 13 February 2003, in
the upper part of the glacier at 4175 m a.s.l., a wave of uncovered and covered ice
advanced 320 m since 10 February 1999. Between the images of 13 February 2003 and
8 February 2004, the ice-wave advanced 5.140 m with a mean velocity of 14.3 m/day
on the debris covered glacier. It reached an altitude of 3910 m a.s.l., 360 m upstream
from the stable front position that the glacier had in 2001, 2003 and 2004. On the image
of 25 January 2005, the surge advanced 3000 m with a mean velocity of 8.5 m/day and
surpassed the previous front position. The satellite image of 28 January 2006, shows
that the surge front advanced 440 m with a mean velocity of 1.2 m/day.
Happoldt, H. and Schrott, L., 1993. Horcones Inferior. In: IAHS/UNESCO (1993).
Fluctuations of Glaciers 19851990. Volume VI, pp 70. Zurich: World Glacier
Monitoring Service. Haeberli, W., Hoelzle, M. (Eds).
Unger, C., Espizua, L. E. and Bottero, R., 2000. Untersuchung von Gletscherständen im
tal des Río Mendoza (Zentralargentinische Anden) Kartierung eines Surge-Vorstosses
des Horcones Inferior. Zeitschrift für Gletscherkunde und Glazialgeologie. Band 36, S,
151-157.
Unger, C., Espizua, L. E. and Bottero, Horcones Inferior, 2005. In:. IAHS (ICSI)
UNEP UNESCO, (2005). Fluctuations of Glaciers 1995-2000. Volume VIII, pp 288.
Zurich: World Glacier Monitoring Service, Haeberli, W., Zemp, M., Frauenfelder, R.,
Hoelzle, M., Kääb, A. (Eds.).