AI 中文总结
本研究利用多源遥感数据与地形分析，重建2026年吉隆岩冰混合滑坡级联灾害的源-路径-受灾区系统，明确其观测限制，为高山灾害研究提供可重复的不确定性明确重建方法。
AI 中文摘要
2026年8月26日，中尼边境附近一处涉及岩石和冰川冰的高海拔滑坡，发展成沿通道流动的碎屑流与洪水级联灾害，抵达吉隆口岸/提姆雷。利用时间匹配的Sentinel-2、Landsat-9、PlanetScope和Sentinel-1影像、哥白尼数字高程模型（Copernicus DEM）地形分析，以及联合国卫星中心（UNOSAT）/哥白尼应急管理服务（Copernicus EMS）快速制图，我们重建了“源-路径-受灾区”系统。嵌套多传感器影像包将事件后变化/源地表约束为优选的1.009 km²（范围0.491-1.841 km²），而受地形和排水约束的代表性路径延伸21.843 km至吉隆口岸，落差约3396 m。事件前的Sentinel-2序列未显示明确的大规模地表变化；最后一张可用光学影像拍摄于灾害发生前45.85小时。全球降水测量任务（GPM）IMERG V07 Late和ERA5-Land均未将五个预设降水窗口归为异常湿润的上尾部分。相比之下，ERA5-Land的7天平均2米气温（9.43℃）和正积温总量（65.94℃·日）超过2001-2025年所有25个匹配年份，提供了区域热环境背景，但未给出触发因素的证据。快速制图划定了下游37.353 km²的受扰范围，包含695个建筑点和15.671 km的被损毁道路。这些是初步绘制的特征，并非完整的损害普查。我们的主要贡献是对整个级联灾害及其观测限制进行了明确不确定性、可重复的重建：开放地球观测数据可靠地约束了一级源范围、传播路径、环境背景和影响，而确切的脱离边缘、源体积、短暂的灾害前活动、启动机制和源尺度水文学仍未解决。
英文摘要
The 26 August 2026 Gyirong cascade connected a high-mountain failure to developed downstream valleys. Event-bracketing observations delineate a preferred changed/source surface of 1.01 km^2, within alternative interpreted envelopes of 0.49-1.84 km^2, and a representative 21.8 km source-to-port route descending 3.40 km. Across two precipitation products, five antecedent windows and six fixed spatial supports, all 60 matched-year ranks remain below the 90th-percentile wet threshold. The source-nearest 7-day temperature mean of 9.43 degrees C exceeds all 25 matched years from 2001-2025. Positive temperature anomalies extend to every tested support, but ranks vary from the 88th percentile to above all historical values. Within the subsequently affected 37.354 km^2 UNOSAT footprint, modelled built-up surface increases from 0.036 to 0.441 km^2 between 1975 and 2020; its fraction of the fixed area rises from 0.096% to 1.181%. Delivered rapid maps contain 695 building points and 15.671 km of roads graded destroyed. These measurements connect the physical footprint with environmental context and historical exposure development. They complement existing process reconstruction while leaving the initiation mechanism and the mechanical role of warming unresolved.
