Iceberg discharge influences ocean circulation, affects climate and increases global sea level. Icebergs are also known to gouge the seafloor in water depths limited by their keel depth, thus representing a hazard to subsea infrastructure. Here, we provide evidence that icebergs can affect the seafloor at depths greater than their keel depth by triggering submarine landslides. Using repeat bathymetric surveys from multibeam echo sounders, we investigate the cause of a submarine landslide that occurred in Southwind Fjord, Baffin Island, between September 2018 and September 2019. This landslide is shown to be closely associated with recently formed iceberg pits at its headscarp carved by an iceberg that grounded and that capsized in the fjord in early September 2018. Geotechnical data from a nearby sediment core indicate that the vertical loading induced by the iceberg grounding and capsizing is sufficient to trigger the observed landslide. These results imply that icebergs originating from the Arctic, Greenland and Antarctica are hazards thousands of kilometres away from their original source and can affect continental slopes by triggering submarine landslides. This process represents an additional source of marine geohazards, especially if climate change leads to increased iceberg discharge.

冰山排放影响海洋环流，影响气候并增加全球海平面。众所周知，冰山会在受其龙骨深度限制的水深中凿开海底，从而对海底基础设施构成威胁。在这里，我们提供的证据表明，冰山可以通过引发海底滑坡来影响深度大于其龙骨深度的海底。使用多波束回声测深仪的重复测深测量，我们调查了 2018 年 9 月至 2019 年 9 月期间在巴芬岛南风峡湾发生的海底山体滑坡的原因。该山体滑坡与最近在其头岩雕刻的冰山坑密切相关2018 年 9 月上旬在峡湾搁浅并倾覆的冰山。来自附近沉积物核心的岩土数据表明，冰山接地和倾覆引起的垂直载荷足以引发观察到的滑坡。这些结果表明，源自北极、格陵兰和南极洲的冰山距离其原始来源数千公里，并可能通过引发海底滑坡来影响大陆斜坡。这个过程代表了海洋地质灾害的另一个来源，特别是如果气候变化导致冰山排放增加。