Elevation-dependent shift of landslide activity in mountain permafrost regions of the Qilian Mountains

摘要: Increasing landslide activities in cold regions have been attributed to rising temperatures and consequent permafrost degradation. While previous studies have linked permafrost degradation to slope instability, the elevation-dependent effects of this degradation on landslide occurrences in the high-mountain regions of the Qinghai–Tibet Plateau (QTP) remain poorly understood, particularly concerning their spatial distribution and timing. This study addresses this gap by investigating the distribution and timing of landslides in the Babao River catchment, located in the southeastern Qilian Mountains of the northeastern QTP. Our results reveal a substantial increase in landslide events during the study period of 2009–2018: only 14 occurrences were recorded before and in 2009, 22 between 2010–2015, and 105 during 2016–2018. Notably, we observed an upward shift in the elevation of landslide occurrences, with an …