Recent Intensification (2004-2020) of Permafrost Mass-Wasting in the Central Mackenzie Valley Foothills Is a Legacy of Past Forest Fire Disturbances
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10454412" target="_blank" >RIV/00216208:11310/22:10454412 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=daHV~9sPo1" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=daHV~9sPo1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2022GL100559" target="_blank" >10.1029/2022GL100559</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Recent Intensification (2004-2020) of Permafrost Mass-Wasting in the Central Mackenzie Valley Foothills Is a Legacy of Past Forest Fire Disturbances
Popis výsledku v původním jazyce
The effects of recent climate change are accelerating permafrost thaw, including ice-rich landscapes of the western Canadian Arctic. However, regional drivers of permafrost slope failure in hillslopes with warm, thin permafrost remain poorly understood. Repeat satellite imagery (1984-2020) indicates rapid increases in retrogressive thaw slumps (RTSs) and deep-seated permafrost landslides (DSPLs) since 2004, indicating a change in slope stability thresholds in an area that otherwise appeared thaw stable. The widespread occurrence of DSPL represents a contrasting geomorphic response to the RTS-dominated ice-rich permafrost landscapes. In this study area, RTS and DSPL occur predominantly in areas that were burned by forest fires in the 1990s, indicating a legacy thermal disturbance that preconditioned permafrost hillslopes for failure. The relations between historic fires and the later development of widespread permafrost slope failures represent an outstanding example of the complex interactions between inherited landscape sensitivity in ice-rich terrain and ongoing climate change.
Název v anglickém jazyce
Recent Intensification (2004-2020) of Permafrost Mass-Wasting in the Central Mackenzie Valley Foothills Is a Legacy of Past Forest Fire Disturbances
Popis výsledku anglicky
The effects of recent climate change are accelerating permafrost thaw, including ice-rich landscapes of the western Canadian Arctic. However, regional drivers of permafrost slope failure in hillslopes with warm, thin permafrost remain poorly understood. Repeat satellite imagery (1984-2020) indicates rapid increases in retrogressive thaw slumps (RTSs) and deep-seated permafrost landslides (DSPLs) since 2004, indicating a change in slope stability thresholds in an area that otherwise appeared thaw stable. The widespread occurrence of DSPL represents a contrasting geomorphic response to the RTS-dominated ice-rich permafrost landscapes. In this study area, RTS and DSPL occur predominantly in areas that were burned by forest fires in the 1990s, indicating a legacy thermal disturbance that preconditioned permafrost hillslopes for failure. The relations between historic fires and the later development of widespread permafrost slope failures represent an outstanding example of the complex interactions between inherited landscape sensitivity in ice-rich terrain and ongoing climate change.
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
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Geophysical Research Letters
ISSN
0094-8276
e-ISSN
1944-8007
Svazek periodika
49
Číslo periodika v rámci svazku
24
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
10
Strana od-do
e2022GL100559
Kód UT WoS článku
000924604600011
EID výsledku v databázi Scopus
2-s2.0-85145202358