 |
| Titel |
LiDAR for monitoring mass movements in permafrost environments at the cirque Hinteres Langtal, Austria, between 2000 and 2008 |
| VerfasserIn |
M. Avian, A. Kellerer-Pirklbauer, A. Bauer |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 9, no. 4 ; Nr. 9, no. 4 (2009-07-07), S.1087-1094 |
| Datensatznummer |
250006873
|
| Publikation (Nr.) |
 copernicus.org/nhess-9-1087-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Permafrost areas receive more and more attention in terms of natural hazards
in recent years due to ongoing global warming. Active rockglaciers are
mixtures of debris and ice (of different origin) in high-relief environments
indicating permafrost conditions for a substantial period of time. Style and
velocity of the downward movement of this debris-ice-mass is influenced by
topoclimatic conditions. The rockglacier Hinteres Langtalkar is stage of
extensive modifications in the last decade as a consequence of an
extraordinary high surface movement. Terrestrial laserscanning (or LiDAR)
campaigns have been out once or twice per year since 2000 to monitor
surface dynamics at the highly active front of the rockglacier. High
resolution digital terrain models are the basis for annual and inter-annual
analysis of surface elevation changes. Results show that the observed area
shows predominantly positive surface elevation changes causing a consequent
lifting of the surface over the entire period. Nevertheless a decreasing
surface lifting of the observed area in the last three years leads to the
assumption that the material transport from the upper part declines in the
last years. Furthermore the rockglacier front is characterized by extensive
mass wasting and partly disintegration of the rockglacier body. As indicated
by the LiDAR results as well as from field evidence, this rockglacier front
seems to represent a permafrost influenced landslide. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|