TY  - THES
A1  - Hermanns, Reginald L.
T1  - Spatial-temporal distribution of mountain-front collapse and formation of glant landslides in the arid andes of northwest Argentina (24-28° S, 65-68° W)
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Hermanns, Reginald L.
A1  - Strecker, Manfred
T1  - Structural and lithological controls on large quaternary bedrock landsliedes in NW-Argentina
Y1  - 1999
ER  - 
TY  - JOUR
A1  - Hermanns, Reginald L.
A1  - Trauth, Martin H.
A1  - McWilliams, Michael O.
A1  - Strecker, Manfred
T1  - Tephrochronologic Constraints on temporal Distribution of large Landslides in NW-Argentina
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Trauth, Martin H.
A1  - Alonso, Ricardo N.
A1  - Haselton, Kirk R.
A1  - Hermanns, Reginald L.
A1  - Strecker, Manfred
T1  - Climate change and mass movements in the NW Argentine Andes
Y1  - 2000
ER  - 
TY  - JOUR
A1  - Svennevig, Kristian
A1  - Hermanns, Reginald L.
A1  - Keiding, Marie
A1  - Binder, Daniel
A1  - Citterio, Michele
A1  - Dahl-Jensen, Trine
A1  - Mertl, Stefan
A1  - Sørensen, Erik Vest
A1  - Voss, Peter Henrik
T1  - A large frozen debris avalanche entraining warming permafrost ground-the June 2021 Assapaat landslibe, West Greenland
JF  - Landslides
N2  - A large landslide (frozen debris avalanche) occurred at Assapaat on the south coast of the Nuussuaq Peninsula in Central West Greenland on June 13, 2021, at 04:04 local time. We present a compilation of available data from field observations, photos, remote sensing, and seismic monitoring to describe the event. Analysis of these data in combination with an analysis of pre- and post-failure digital elevation models results in the first description of this type of landslide. The frozen debris avalanche initiated as a 6.9 * 10(6) m(3) failure of permafrozen talus slope and underlying colluvium and till at 600-880 m elevation. It entrained a large volume of permafrozen colluvium along its 2.4 km path in two subsequent entrainment phases accumulating a total volume between 18.3 * 10(6) and 25.9 * 10(6) m(3). About 3.9 * 10(6) m(3) is estimated to have entered the Vaigat strait; however, no tsunami was reported, or is evident in the field. This is probably because the second stage of entrainment along with a flattening of slope angle reduced the mobility of the frozen debris avalanche. We hypothesise that the initial talus slope failure is dynamically conditioned by warming of the ice matrix that binds the permafrozen talus slope. When the slope ice temperature rises to a critical level, its shear resistance is reduced, resulting in an unstable talus slope prone to failure. Likewise, we attribute the large-scale entrainment to increasing slope temperature and take the frozen debris avalanche as a strong sign that the permafrost in this region is increasingly at a critical state. Global warming is enhanced in the Arctic and frequent landslide events in the past decade in Western Greenland let us hypothesise that continued warming will lead to an increase in the frequency and magnitude of these types of landslides. Essential data for critical arctic slopes such as precipitation, snowmelt, and ground and surface temperature are still missing to further test this hypothesis. It is thus strongly required that research funds are made available to better predict the change of landslide threat in the Arctic.
KW  - Assapaat landslide
KW  - Slope temperature
KW  - Global warming
Y1  - 2022
U6  - https://doi.org/10.1007/s10346-022-01922-7
SN  - 1612-510X
SN  - 1612-5118
VL  - 19
SP  - 2549
EP  - 2567
PB  - Springer
CY  - Heidelberg
ER  -