Distinct types of landslides in moraines associated with the post-LIA glacier thinning: Observations from the Kinzl Glacier, Huascaran, Peru
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F20%3A10442468" target="_blank" >RIV/00216208:11310/20:10442468 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/86652079:_____/20:00525198
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qPM1GvqQmc" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qPM1GvqQmc</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.scitotenv.2020.139997" target="_blank" >10.1016/j.scitotenv.2020.139997</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Distinct types of landslides in moraines associated with the post-LIA glacier thinning: Observations from the Kinzl Glacier, Huascaran, Peru
Popis výsledku v původním jazyce
The Kinzl Glacier is a unique dendritic-type glacier of the Peruvian Cordillera Blanca and is surrounded by well-developed Little Ice Age (UA) moraines. Based on field observations and analysis of historical photographs (since 1932) and remotely sensed images (since 1948), we interpret distinct mechanisms of landslides in these moraines and link them to glacier retreat and thinning. Three types of landslides are distinguished according to the cross-profile morphology: (i) type "N", (ii) type "M" and (iii) type "A". Our data show that sliding of type "N" is an ice-contact slope failure that occurs as a gradual process simultaneously to glacier downwasting. In contrast, type "A" can occur at any time once the glacier has downwasted below the sliding plane and cannot buttress the nearly vertical inner slopes of the moraine anymore. We further argue that the type "M" can gradually evolve from type "N" or can occur as an episodic event. Probably due to overconsolidation of moraine material, landslides of types "N" and "M" keep their shape during sliding and move in form of several hundred meters long unbroken blocks. In contrast type "A" is internally disintegrated during land silding. All investigated landslide types are characterized by increased width-length ratio and movement perpendicular to the direction of the flow of the glacier. We opine that the occurrence of these landslide types is directly or indirectly associated with glacial ice loss occurring since the end of the LIA. The observed landslides in the UA moraines of the Kinzl Glacier are unique in the regional context considering their estimated size on the order of 10(6) m(3) and contribute significantly to the paraglacial adjustment of moraine slopes and landform evolution in the post-LIA context. Apart from their role in moraine evolution, these landslides can trigger hazardous cascading process-chains in high-alpine environments. (C) 2020 Elsevier B.V. All rights reserved.
Název v anglickém jazyce
Distinct types of landslides in moraines associated with the post-LIA glacier thinning: Observations from the Kinzl Glacier, Huascaran, Peru
Popis výsledku anglicky
The Kinzl Glacier is a unique dendritic-type glacier of the Peruvian Cordillera Blanca and is surrounded by well-developed Little Ice Age (UA) moraines. Based on field observations and analysis of historical photographs (since 1932) and remotely sensed images (since 1948), we interpret distinct mechanisms of landslides in these moraines and link them to glacier retreat and thinning. Three types of landslides are distinguished according to the cross-profile morphology: (i) type "N", (ii) type "M" and (iii) type "A". Our data show that sliding of type "N" is an ice-contact slope failure that occurs as a gradual process simultaneously to glacier downwasting. In contrast, type "A" can occur at any time once the glacier has downwasted below the sliding plane and cannot buttress the nearly vertical inner slopes of the moraine anymore. We further argue that the type "M" can gradually evolve from type "N" or can occur as an episodic event. Probably due to overconsolidation of moraine material, landslides of types "N" and "M" keep their shape during sliding and move in form of several hundred meters long unbroken blocks. In contrast type "A" is internally disintegrated during land silding. All investigated landslide types are characterized by increased width-length ratio and movement perpendicular to the direction of the flow of the glacier. We opine that the occurrence of these landslide types is directly or indirectly associated with glacial ice loss occurring since the end of the LIA. The observed landslides in the UA moraines of the Kinzl Glacier are unique in the regional context considering their estimated size on the order of 10(6) m(3) and contribute significantly to the paraglacial adjustment of moraine slopes and landform evolution in the post-LIA context. Apart from their role in moraine evolution, these landslides can trigger hazardous cascading process-chains in high-alpine environments. (C) 2020 Elsevier B.V. All rights reserved.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10508 - Physical geography
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Science of the Total Environment
ISSN
0048-9697
e-ISSN
—
Svazek periodika
739
Číslo periodika v rámci svazku
October
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
15
Strana od-do
139997
Kód UT WoS článku
000561792100012
EID výsledku v databázi Scopus
2-s2.0-85086384650