July 8, 2021
A combination of satellite imagery and bathymetric surveys shows that a submarine landslide caused by the grounding of an iceberg occurred in Southwind Fjord in 2018. Bathymetric data from the CCGS Amundsen was used to identify other locations where grounding of icebergs could have caused submarine landslides. These results show that icebergs are hazardous over a great distance away from their source of origin and can affect the development of marine infrastructures.
Repeated surveys are key to identify this type of natural hazard. “Unlike the terrestrial environment where satellites take images every few days, it is very rare to have annual images of the seabed, especially in the Arctic”, says Alexandre Normandeau, researcher at Natural Resources Canada. He and a team of scientists will participate in the 2021 Expedition to survey the area again, map the morphology of the landslide with Amundsen Science’s ROV and study the benthic ecosystem recovery.