Técnicas geomáticas aplicadas al control de los glaciares rocosos. Comparación de los glaciares rocosos de Doesen (Alpes), Posets (Pirineos) y Corral del Veleta (Sierra Nevada)

Headnote

Abstract

There is no doubt that the study of glacial geomorphology can inform us about the climate changes that have taken place throughout the Quarternary Era. The analysis of a glacier in the present shows us the current impact of the climate upon it, and a continuous sequence of its behaviour could even be an indicator for predicting its future evolution.

In this article a comparative study is undertaken of three rocky glaciers: Doesen in the Austrian Alps, Posets in the Central Pyrenees, and Corral de Veleta in the Spanish Sierra Nevada. In these three glaciers annual measurements were made (2001-2008) of the horizontal and vertical displacement after the installation of control points (spikes and rods). In this study, geodesic data was not available for the Doesen glacier in the year 2003, nor for the Posets glacier in the years 2002, 2003, and 2004.

Headnote

On the other hand, there is thermal data for the floor of the rocky glacier of Corral de Veleta for the same years (the period 2001-2008) as the geomatic study. These thermal records allow us to observe the relation between summers with warmer recorded ground temperatures and greater dynamism. This behaviour could be similar to other rocky glaciers, although the geomorphological responses could vary in relation to the specific environment and local climatic conditions.

Key words: Geomatics, Rock glacier, Dynamic, Temperature.

Resumen

Sin lugar a dudas, el estudio de la geomorfologla glaciar puede informarnos de los cambios climáticos que se han producido a lo largo del Cuatemario. Su análisis en el pmsente nos indica la influencia actual del clima sobre ellos, incluso una secuencia continuada del comportamiento del mismo podrIa ser un indicador para la determinación de la evolución futura del glaciar analizado.

En este artIculo se realiza un estudio comparado de tms glaciares rocosos: Doesen (Alpes Austriacos), Posets (Pirineos Centrales) y Corral del Veleta (Sierra Nevada). En estos tres glaciams se han realizado mediciones anuales (2001-2008) del desplazamiento horizontal y vertical a partir de la instalación de puntos de control (clavos y varillas). En este estudio no se dispone de thtos geodésicos para el glaciar de Doesen en el aflo 2003, y para el glaciar de Posets en los aflos 2002, 2003 y 2004.

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