im PublikationsserverTitelangaben
Rom, Jakob ; Haas, Florian
; Heckmann, Tobias ; Dremel, Fabian ; Fleischer, Fabian ; Altmann, Moritz ; Stark, Manuel ; Becht, Michael:
Establishing a record of extreme debris flow events in a high Alpine catchment since the end of the Little Ice Age using lichenometric dating.
In: Geografiska annaler : Series A, Physical geography. 105 (2023) 1.
- S. 47-63.
ISSN 0435-3676 ; 1468-0459
Volltext
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Link zum Volltext (externe URL): https://doi.org/10.1080/04353676.2023.2187531 |
Kurzfassung/Abstract
Establishing a record of large debris flow events in high Alpine areas prior to the availability of high resolution remote sensing data can be very challenging. In this study, we investigate the debris flow activity in two tributary valleys of the Horlachtal catchment in Tyrol, Austria between the end of the Little Ice Age at about 1850 and the first available area wide aerial images from 1947. To accomplish this, we calculated a local lichenometric calibration curve using the long axis diameters of the five largest Rhizocarpon lichen thalli at 51 different reference locations. Because of the interval-censored dating of most of the reference sites, we established a bootstrapping approach within the calibration curve calculation process. With the help of the lichenometric calibration data, we were able to date 47 old debris flow deposits in the study area. The results indicate no increasing or decreasing trends in frequencies of extreme debris flow events. In addition, the results point to a very local character of debris flow triggering precipitation events, as we can detect major differences in neighbouring valleys. Lichenometric derived datings also provide temporal informations about the end of debris flow activity at some sites in the study area and thus can contribute to a better understanding of debris flow systems.
Forschungsprojekte
Research Unit SEHAG - Sensitivity of high Alpine geosystems to climate change since 1850 (SEHAG)
Weitere Angaben
| Publikationsform: | Artikel |
|---|---|
| Schlagwörter: | Debris flows; lichenometry; central Alps; Horlachtal; extreme events |
| Sprache des Eintrags: | Englisch |
| Institutionen der Universität: | Mathematisch-Geographische Fakultät > Geographie > Lehrstuhl für Physische Geographie |
| DOI / URN / ID: | 10.1080/04353676.2023.2187531 |
| Open Access: Freie Zugänglichkeit des Volltexts?: | Nein |
| Peer-Review-Journal: | Ja |
| Verlag: | Wiley-Blackwell |
| Die Zeitschrift ist nachgewiesen in: | |
| Titel an der KU entstanden: | Ja |
| KU.edoc-ID: | 31777 |
Letzte Änderung: 19. Jul 2023 09:11
URL zu dieser Anzeige: https://edoc.ku.de/id/eprint/31777/
