Spatial distribution characteristics of climate-induced landslides in the Eastern Himalayas  

作　　者：UWIZEYIMANA David LIU Weiming HUANG Yu HABUMUGISHA Jules Maurice ZHOU Yanlian YANG Zewen 

机构地区：[1]State Key Laboratory of Mountain Hazards and Engineering Resilience,Institute of Mountain Hazards and Environment,Chinese Academy of Sciences(CAS),Chengdu 610299,China [2]China–Pakistan Joint Research Center on Earth Sciences,CAS-HEC,Islamabad 45320,Pakistan [3]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Mountain Science》2024年第10期3396-3412,共17页山地科学学报（英文）

基　　金：supported by the Second Tibetan Plateau Scientific Expedition and Research (STEP) (2019QZKK0903);the National Natural Science Foundation of China (No. 42071017);the science and technology research program of the Chinese Academy of Sciences' Institute of Mountain Hazards and Environment (No.IMHE-ZDRW-03);the Alliance of International Science Organizations (ANSO) provided funding for a master's degree

摘　　要：Climate warming is constantly causing hydro-meteorological perturbations,especially in high-altitude mountainous regions,which lead to the occurrences of landslides.The impact of climatic variables(i.e.,precipitation and temperature)on the distribution of landslides in the eastern regions of the Himalayas is poorly understood.To address this,the current study analyzes the relationship between the spatial distribution of landslide characteristics and climatic variables from 2013 to 2021.Google Earth Engine(GEE)was employed to make landslide inventories using satellite data.The results show that 2163,6927,and 9601 landslides were heterogeneously distributed across the study area in 2013,2017,and 2021,respectively.The maximum annual temperature was positively correlated with the distribution of landslides,whereas precipitation was found to have a non-significant impact on the landslide distribution.Spatially,most of the landslides occurred in areas with maximum annual precipitation ranging from 800 to 1600 mm and maximum annual temperature above 15℃.However,in certain regions,earthquake disruptions marginally affected the occurrence of landslides.Landslides were highly distributed in areas with elevations ranging between 3000 and 5000 m above sea level,and many landslides occurred near the lower permafrost limit and close to glaciers.The latter indicates that temperature change-induced freeze-thaw action influences landslides in the region.Temperature changes have shown a positive correlation with the number of landslides within elevations,indicating that temperature affects their spatial distribution.Various climate projections suggest that the region will experience further warming,which will increase the likelihood of landslides in the future.Thus,it is crucial to enhance ground observation capabilities and climate datasets to effectively monitor and mitigate landslide risks.

关 键 词：Landslide inventory Climate variables Normalized difference vegetation index CRYOSPHERE Eastern Himalaya 

分 类 号：P467[天文地球—大气科学及气象学] P642.22