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DOI	10.1038/s41561-021-00767-4
	Submarine landslides triggered by iceberg collision with the seafloor
	Normandeau A.; MacKillop K.; Macquarrie M.; Richards C.; Bourgault D.; Campbell D.C.; Maselli V.; Philibert G.; Clarke J.H.
发表日期	2021
ISSN	17520894
起始页码	599
结束页码	605
卷号	14 期号:8
英文摘要	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. © 2021, Crown.
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206944
作者单位	Geological Survey of Canada (Atlantic), Natural Resources Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada; Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada; Institut des Sciences de la Mer, Université du Québec à Rimouski, Rimouski, QC, Canada; Department of Earth and Environmental Sciences, Dalhousie University, Halifax, NS, Canada; Center for Coastal and Ocean Mapping, University of New Hampshire, Durham, NH, United States
推荐引用方式 GB/T 7714	Normandeau A.,MacKillop K.,Macquarrie M.,et al. Submarine landslides triggered by iceberg collision with the seafloor[J],2021,14(8).
APA	Normandeau A..,MacKillop K..,Macquarrie M..,Richards C..,Bourgault D..,...&Clarke J.H..(2021).Submarine landslides triggered by iceberg collision with the seafloor.Nature Geoscience,14(8).
MLA	Normandeau A.,et al."Submarine landslides triggered by iceberg collision with the seafloor".Nature Geoscience 14.8(2021).